com.github.fieldintercept.util.JavaClassFile Maven / Gradle / Ivy
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package com.github.fieldintercept.util;
import java.io.*;
import java.lang.instrument.IllegalClassFormatException;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.nio.charset.Charset;
import java.util.*;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* java类文件
*
* ClassFile {
* u4 magic;
* u2 minor_version;
* u2 major_version;
* u2 constant_pool_count;
* cp_info constant_pool[constant_pool_count-1];
* u2 access_flags;
* u2 this_class;
* u2 super_class;
* u2 interfaces_count;
* u2 interfaces[interfaces_count];
* u2 fields_count;
* field_info fields[fields_count];
* u2 methods_count;
* method_info methods[methods_count];
* u2 attributes_count;
* attribute_info attributes[attributes_count];
* }
*
* class文件结构.官方文档 https://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html
* 参考文件 com.sun.org.apache.bcel.internal.classfile.ClassParser
*
* @author wangzihao
*/
public class JavaClassFile {
private static final Attribute[] EMPTY_ATTRIBUTES = {};
private static final Attribute.CodeException[] EMPTY_CODE_EXCEPTIONS = {};
private static final Attribute.LineNumber[] EMPTY_LINE_NUMBER_TABLE = {};
private static final Attribute.LocalVariable[] EMPTY_LOCAL_VARIABLE_TABLE = {};
private static final Attribute.InnerClass[] EMPTY_INNER_CLASSES = {};
private static final Attribute.StackMapEntry[] EMPTY_STACK_MAP_ENTRY = {};
private static final Attribute.StackMapFrame[] EMPTY_STACK_MAP_FRAME = {};
private static final Attribute.BootstrapMethod[] EMPTY_BOOT_STRAP_METHOD = {};
private static final Attribute.StackMapType[] EMPTY_STACK_MAP_TYPE = {};
private static final Attribute.MethodParameter[] EMPTY_METHOD_PARAMETER = {};
private static final int[] EMPTY_EXCEPTION_INDEX_TABLE = {};
private static final String[] EMPTY_STRING = {};
private static final Member.Type[] EMPTY_TYPE = {};
private long minorVersion;
private JavaVersion majorVersion;
private ConstantPool constantPool;
private int accessFlags;
private int thisClassIndex;
private int superClassIndex;
private int[] interfacesIndex;
private Member[] fields;
private Member[] methods;
private Attribute[] attributes;
private Class clazz;
public JavaClassFile(Class clazz) throws ClassNotFoundException, IOException, IllegalClassFormatException {
this(new ClassReader(clazz));
this.clazz = clazz;
}
public JavaClassFile(String path, String name) throws ClassNotFoundException, IOException, IllegalClassFormatException {
this(new ClassReader(path, name));
}
public JavaClassFile(InputStream in) throws IOException, IllegalClassFormatException {
this(new ClassReader(in));
}
public JavaClassFile(byte[] codes) throws IllegalClassFormatException {
this(new ClassReader(codes));
}
public JavaClassFile(ClassReader reader) throws IllegalClassFormatException {
int magic = reader.readInt32();
//第一位必须是 cafe babe
if (magic != 0xCAFEBABE) {
throw new IllegalClassFormatException("is not a Java .class file");
}
this.minorVersion = reader.readUint16();
this.majorVersion = JavaVersion.valueOf(reader.readUint16());
this.constantPool = readConstantPool(reader);
this.accessFlags = readAccessFlags(reader);
this.thisClassIndex = reader.readUint16();
this.superClassIndex = reader.readUint16();
this.interfacesIndex = reader.readUint16s();
this.fields = readMembers(reader, false);
this.methods = readMembers(reader, true);
this.attributes = readAttributes(reader, null);
reader.close();
}
/**
* Determine the name of the class file, relative to the containing
* package: e.g. "String.class"
*
* @param clazz the class
* @return the file name of the ".class" file
*/
public static String getClassFileName(Class clazz) {
Objects.requireNonNull(clazz, "Class must not be null");
String className = clazz.getName();
int lastDotIndex = className.lastIndexOf('.');
return className.substring(lastDotIndex + 1) + ".class";
}
private static String toJsonArray(Object array) {
if (array == null) {
return "null";
}
if (array instanceof Object[]) {
StringJoiner joiner = new StringJoiner(",", "[", "]");
for (Object e : (Object[]) array) {
if (e instanceof Number) {
joiner.add(e.toString());
} else if (e == null) {
joiner.add("null");
} else if (e.getClass().isArray()) {
joiner.add(toJsonArray(array));
} else if (e instanceof CharSequence) {
joiner.add("\"" + e + "\"");
} else {
joiner.add(e.toString());
}
}
return joiner.toString();
}
if (array instanceof byte[]) {
return Arrays.toString((byte[]) array);
}
if (array instanceof int[]) {
return Arrays.toString((int[]) array);
}
if (array instanceof short[]) {
return Arrays.toString((short[]) array);
}
if (array instanceof long[]) {
return Arrays.toString((long[]) array);
}
if (array instanceof double[]) {
return Arrays.toString((double[]) array);
}
return array.toString();
}
public static void main(String[] args) throws Exception {
JavaClassFile classFile = new JavaClassFile(LinkedHashMap.class);
//这里换成自己的class包路径
String path = "D:\\java\\github\\spring-boot-protocol\\target\\classes\\com\\github\\netty\\protocol\\servlet";
Map javaClassMap = new HashMap<>();
File[] files = new File(path).listFiles();
if (files != null) {
for (File file : files) {
String fileName = file.getName();
if (fileName.endsWith(".class")) {
JavaClassFile javaClassFile = new JavaClassFile(path, fileName);
List localVariables = Stream.of(javaClassFile.getMethods()).map(Member::getLocalVariableTable).collect(Collectors.toList());
javaClassMap.put(fileName, javaClassFile);
}
}
}
System.out.println("end..");
}
private int readAccessFlags(ClassReader reader) {
int accessFlags = reader.readUint16();
if ((accessFlags & Modifier.INTERFACE) != 0) {
accessFlags |= Modifier.ABSTRACT;
}
return accessFlags;
}
private ConstantPool readConstantPool(ClassReader reader) {
int constantPoolCount = reader.readUint16();
return new ConstantPool(constantPoolCount, reader);
}
private Member[] readMembers(ClassReader reader, boolean method) {
int memberCount = reader.readUint16();
Member[] members = new Member[memberCount];
for (int i = 0; i < members.length; i++) {
members[i] = new Member();
members[i].method = method;
members[i].classFile = this;
members[i].accessFlags = reader.readUint16();
members[i].nameIndex = reader.readUint16();
members[i].descriptorIndex = reader.readUint16();
members[i].name = constantPool.getUtf8(members[i].nameIndex);
members[i].descriptorName = constantPool.getUtf8(members[i].descriptorIndex);
members[i].attributes = readAttributes(reader, null);
}
return members;
}
private Attribute[] readAttributes(ClassReader reader, Attribute parent) {
int attributesCount = reader.readUint16();
if (attributesCount == 0) {
return EMPTY_ATTRIBUTES;
} else {
Attribute[] attributes = new Attribute[attributesCount];
for (int i = 0; i < attributes.length; i++) {
int attrNameIndex = reader.readUint16();
attributes[i] = new Attribute(attrNameIndex, reader.readInt32(), parent, reader);
}
return attributes;
}
}
public JavaVersion getMajorVersion() {
return majorVersion;
}
public Attribute[] getAttributes() {
return attributes;
}
public ConstantPool getConstantPool() {
return constantPool;
}
public int getAccessFlags() {
return accessFlags;
}
public Member[] getFields() {
return fields;
}
public Member[] getMethods() {
return methods;
}
public Member.Type getThisType() {
return Member.Type.getObjectType(getThisClassName());
}
public Class getThisClass() {
if (clazz == null) {
clazz = getThisType().resolveClass();
}
return clazz;
}
public String getThisClassName() {
return constantPool.getClassName(thisClassIndex);
}
public String getSuperClassName() {
if (superClassIndex != 0) {
return constantPool.getClassName(superClassIndex);
}
return "";
}
public JavaClassFile getSuperClassFile() throws IllegalClassFormatException, IOException, ClassNotFoundException {
if (superClassIndex != 0) {
return new JavaClassFile(getSuperClass());
}
return null;
}
public Member.Type getSuperType() {
if (superClassIndex != 0) {
return Member.Type.getObjectType(getSuperClassName());
} else {
return null;
}
}
public Class getSuperClass() {
if (superClassIndex != 0) {
return getSuperType().resolveClass();
} else {
return null;
}
}
public String[] getInterfaceNames() {
String[] interfaceNames = new String[interfacesIndex.length];
for (int i = 0; i < interfaceNames.length; i++) {
interfaceNames[i] = constantPool.getClassName(interfacesIndex[i]);
}
return interfaceNames;
}
public Member.Type[] getInterfaceTypes() {
String[] interfaceNames = getInterfaceNames();
Member.Type[] types = new Member.Type[interfaceNames.length];
for (int i = 0; i < interfaceNames.length; i++) {
types[i] = Member.Type.getObjectType(interfaceNames[i]);
}
return types;
}
public Class[] getInterfaceClasses() {
String[] interfaceNames = getInterfaceNames();
Class[] types = new Class[interfaceNames.length];
for (int i = 0; i < interfaceNames.length; i++) {
types[i] = Member.Type.getObjectType(interfaceNames[i]).resolveClass();
}
return types;
}
public Member getMethod(String methodName, Class[] parameterTypes, Class returnType) {
String methodDescriptor = Member.Type.getMethodDescriptor(parameterTypes, returnType);
for (Member method : methods) {
if (methodName.equals(method.getName())
&& methodDescriptor.equals(method.getDescriptorName())) {
return method;
}
}
return null;
}
public List getLocalVariableTableList() {
return Stream.of(getMethods()).map(Member::getLocalVariableTable).collect(Collectors.toList());
}
public boolean isInterface() {
return Modifier.isInterface(accessFlags);
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"majorVersion\":\"" + majorVersion + "\"")
.add("\"minorVersion\":" + minorVersion)
.add("\"accessFlags\":\"" + Modifier.toString(accessFlags) + "\"")
.add("\"thisClassIndex\":" + thisClassIndex)
.add("\"thisClassName\":\"" + getThisClassName() + "\"")
.add("\"superClassIndex\":" + superClassIndex)
.add("\"superClassName\":\"" + getSuperClassName() + "\"")
.add("\"interfaces\":" + toJsonArray(getInterfaceNames()))
.add("\"fields\":" + toJsonArray(getFields()))
.add("\"methods\":" + toJsonArray(getMethods()))
.add("\"attributes\":" + toJsonArray(attributes))
.add("\"constantPool\":" + toJsonArray(constantPool.constants))
.add("\"constantPoolDataLength\":" +
Arrays.stream(constantPool.constants)
.filter(Objects::nonNull)
.mapToInt(ConstantPool.ConstantInfo::length)
.sum())
.toString();
}
public enum JavaVersion {
/**
* Java ClassFile versions (the minor version is stored in the 16 most
* significant bits, and the
* major version in the 16 least significant bits).
*/
V1_1(3 << 16 | 45),
V1_2(0 << 16 | 46),
V1_3(0 << 16 | 47),
V1_4(0 << 16 | 48),
V1_5(0 << 16 | 49),
V1_6(0 << 16 | 50),
V1_7(0 << 16 | 51),
V1_8(0 << 16 | 52),
V9(0 << 16 | 53),
V10(0 << 16 | 54),
V11(0 << 16 | 55),
V12(0 << 16 | 56);
private long major;
JavaVersion(long major) {
this.major = major;
}
public static JavaVersion valueOf(long major) {
for (JavaVersion version : values()) {
if (version.major == major) {
return version;
}
}
throw new IllegalArgumentException("bad major");
}
public long getMajor() {
return major;
}
}
public static class ConstantPool {
private ConstantInfo[] constants;
public ConstantPool(int constantPoolCount, ClassReader reader) {
constants = new ConstantInfo[constantPoolCount];
// The constant_pool table is indexed from 1 to constant_pool_count - 1.
for (int i = 1; i < constantPoolCount; i++) {
ConstantInfo constantInfo = readConstantInfo(i, reader);
constants[i] = constantInfo;
// http://docs.oracle.com/javase/specs/jvms/se8/html/jvms-4.html#jvms-4.4.5
// All 8-byte constants take up two entries in the constant_pool table of the class file.
// If a CONSTANT_Long_info or CONSTANT_Double_info structure is the item in the constant_pool
// table at index n, then the next usable item in the pool is located at index n+2.
// The constant_pool index n+1 must be valid but is considered unusable.
if (constantInfo instanceof ConstantDoubleInfo
|| constantInfo instanceof ConstantLongInfo) {
i++;
}
}
}
private ConstantInfo readConstantInfo(int index, ClassReader reader) {
int tag = reader.readUint8();
ConstantInfo constantInfo;
switch (tag) {
case ConstantInfo.CONSTANT_INTEGER:
constantInfo = new ConstantIntegerInfo(index, reader);
break;
case ConstantInfo.CONSTANT_FLOAT:
constantInfo = new ConstantFloatInfo(index, reader);
break;
case ConstantInfo.CONSTANT_LONG:
constantInfo = new ConstantLongInfo(index, reader);
break;
case ConstantInfo.CONSTANT_DOUBLE:
constantInfo = new ConstantDoubleInfo(index, reader);
break;
case ConstantInfo.CONSTANT_UTF8:
constantInfo = new ConstantUtf8Info(index, reader);
break;
case ConstantInfo.CONSTANT_STRING:
constantInfo = new ConstantStringInfo(index, reader);
break;
case ConstantInfo.CONSTANT_CLASS:
constantInfo = new ConstantClassInfo(index, reader);
break;
case ConstantInfo.CONSTANT_FIELD_REF:
constantInfo = new ConstantFieldRefInfo(index, new ConstantMemberRefInfo(reader));
break;
case ConstantInfo.CONSTANT_METHOD_REF:
constantInfo = new ConstantMethodRefInfo(index, new ConstantMemberRefInfo(reader));
break;
case ConstantInfo.CONSTANT_INTERFACE_METHOD_REF:
constantInfo = new ConstantInterfaceMethodRefInfo(index, new ConstantMemberRefInfo(reader));
break;
case ConstantInfo.CONSTANT_NAME_AND_TYPE:
constantInfo = new ConstantNameAndTypeInfo(index, reader);
break;
case ConstantInfo.CONSTANT_METHOD_HANDLE:
constantInfo = new ConstantMethodHandleInfo(index, reader);
break;
case ConstantInfo.CONSTANT_INVOKE_DYNAMIC:
constantInfo = new ConstantInvokeDynamicInfo(index, reader);
break;
case ConstantInfo.CONSTANT_METHOD_TYPE:
constantInfo = new ConstantMethodTypeInfo(index, reader);
break;
default: {
//用户可以自定义解析器
System.out.println("Unkown constant pool tag: " + tag);
constantInfo = new ConstantUnkownInfo(index, tag);
break;
}
}
return constantInfo;
}
public ConstantMethodHandleInfo getConstantMethodHandleInfo(int index) {
return (ConstantMethodHandleInfo) getConstantInfo(index);
}
public ConstantInfo getConstantInfo(int index) {
return constants[index];
}
public ConstantNameAndTypeInfo getNameAndType(int index) {
return (ConstantNameAndTypeInfo) getConstantInfo(index);
}
public String getClassName(int index) {
return getUtf8(((ConstantClassInfo) getConstantInfo(index)).nameIndex);
}
public String getUtf8(int stringIndex) {
if (stringIndex == 0) {
return null;
}
return ((ConstantUtf8Info) getConstantInfo(stringIndex)).value();
}
public String getClassNameForToString(int index) {
if (index == 0) {
return null;
}
return getUtf8ForToString(((ConstantClassInfo) getConstantInfo(index)).nameIndex);
}
public String getUtf8ForToString(int stringIndex) {
if (stringIndex == 0) {
return null;
}
return ((ConstantUtf8Info) getConstantInfo(stringIndex)).valueToString();
}
public int getInteger(int index) {
return ((ConstantIntegerInfo) getConstantInfo(index)).value();
}
public double getDouble(int index) {
return ((ConstantDoubleInfo) getConstantInfo(index)).value();
}
public int getFloat(int index) {
return ((ConstantFloatInfo) getConstantInfo(index)).value();
}
public long getLong(int index) {
return ((ConstantLongInfo) getConstantInfo(index)).value();
}
public interface ConstantInfo {
int CONSTANT_UTF8 = 1;
int CONSTANT_INTEGER = 3;
int CONSTANT_FLOAT = 4;
int CONSTANT_LONG = 5;
int CONSTANT_DOUBLE = 6;
int CONSTANT_CLASS = 7;
int CONSTANT_STRING = 8;
int CONSTANT_FIELD_REF = 9;
int CONSTANT_METHOD_REF = 10;
int CONSTANT_INTERFACE_METHOD_REF = 11;
int CONSTANT_NAME_AND_TYPE = 12;
int CONSTANT_METHOD_HANDLE = 15;
int CONSTANT_METHOD_TYPE = 16;
int CONSTANT_INVOKE_DYNAMIC = 18;
String name();
int length();
}
public class ConstantStringInfo implements ConstantInfo {
private int stringIndex;
private int index;
public ConstantStringInfo(int index, ClassReader reader) {
this.index = index;
this.stringIndex = reader.readUint16();
}
public String value() {
return getUtf8(stringIndex);
}
@Override
public String name() {
return "String";
}
@Override
public int length() {
return 2;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"stringIndex\":" + stringIndex)
.add("\"value\":\"" + getUtf8ForToString(stringIndex) + "\"")
.toString();
}
}
public class ConstantDoubleInfo implements ConstantInfo {
private byte[] value;
private int index;
public ConstantDoubleInfo(int index, ClassReader reader) {
this.index = index;
value = reader.readInt8s(8);
}
public double value() {
long data = ((long) value[0] & 0xff) << 56 |
((long) value[1] & 0xff) << 48 |
((long) value[2] & 0xff) << 40 |
((long) value[3] & 0xff) << 32 |
((long) value[4] & 0xff) << 24 |
((long) value[5] & 0xff) << 16 |
((long) value[6] & 0xff) << 8 |
(long) value[7] & 0xff;
return Double.longBitsToDouble(data);
}
@Override
public String name() {
return "Double";
}
@Override
public int length() {
return 8;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"value\":" + toJsonArray(value))
.toString();
}
}
public class ConstantIntegerInfo implements ConstantInfo {
private int value;
private int index;
public ConstantIntegerInfo(int index, ClassReader reader) {
this.index = index;
this.value = reader.readInt32();
}
@Override
public String name() {
return "Integer";
}
public int value() {
return value;
}
@Override
public int length() {
return 4;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"value\":" + value)
.toString();
}
}
public class ConstantFloatInfo implements ConstantInfo {
private int value;
private int index;
public ConstantFloatInfo(int index, ClassReader reader) {
this.index = index;
value = reader.readInt32();
}
public int value() {
return value;
}
@Override
public String name() {
return "Float";
}
@Override
public int length() {
return 4;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"value\":" + value)
.toString();
}
}
public class ConstantLongInfo implements ConstantInfo {
private byte[] value;
private int index;
public ConstantLongInfo(int index, ClassReader reader) {
this.index = index;
value = reader.readInt8s(8);
}
public long value() {
long data = ((long) value[0] & 0xff) << 56 |
((long) value[1] & 0xff) << 48 |
((long) value[2] & 0xff) << 40 |
((long) value[3] & 0xff) << 32 |
((long) value[4] & 0xff) << 24 |
((long) value[5] & 0xff) << 16 |
((long) value[6] & 0xff) << 8 |
(long) value[7] & 0xff;
return data;
}
@Override
public String name() {
return "Long";
}
@Override
public int length() {
return 8;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"value\":" + toJsonArray(value))
.toString();
}
}
public class ConstantUtf8Info implements ConstantInfo {
private String value;
private String valueToString;
private int length;
private int index;
public ConstantUtf8Info(int index, ClassReader reader) {
this.index = index;
length = reader.readUint16();
byte[] bytes = reader.readInt8s(length);
value = new String(bytes, Charset.forName("UTF-8"));
}
public String value() {
return value;
}
private String valueToString() {
if (valueToString == null) {
valueToString = value.replace("\"", "\\\"")
.replace(":", "\\:")
.replace("{", "\\{")
.replace("}", "\\}")
.replace("[", "\\[")
.replace("]", "\\]");
}
return valueToString;
}
@Override
public String name() {
return "UTF8";
}
@Override
public int length() {
return length;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"value\":\"" + valueToString() + "\"")
.toString();
}
}
public class ConstantClassInfo implements ConstantInfo {
private int nameIndex;
private int index;
public ConstantClassInfo(int index, ClassReader reader) {
this.index = index;
this.nameIndex = reader.readUint16();
}
public String value() {
return getUtf8(nameIndex);
}
@Override
public String name() {
return "Class";
}
@Override
public int length() {
return 2;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"nameIndex\":" + nameIndex)
.add("\"name\":\"" + getUtf8ForToString(nameIndex) + "\"")
.toString();
}
}
public class ConstantFieldRefInfo implements ConstantInfo {
private ConstantMemberRefInfo memberRefInfo;
private int index;
public ConstantFieldRefInfo(int index, ConstantMemberRefInfo memberRefInfo) {
this.index = index;
this.memberRefInfo = memberRefInfo;
}
public ConstantMemberRefInfo value() {
return memberRefInfo;
}
@Override
public String name() {
return "FieldRef";
}
@Override
public int length() {
return 0;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"memberRef\":" + memberRefInfo)
.toString();
}
}
public class ConstantMemberRefInfo implements ConstantInfo {
private int classIndex;
private int nameAndTypeIndex;
public ConstantMemberRefInfo(ClassReader reader) {
classIndex = reader.readUint16();
nameAndTypeIndex = reader.readUint16();
}
public String className() {
return getClassName(classIndex);
}
public ConstantNameAndTypeInfo nameAndType() {
return getNameAndType(nameAndTypeIndex);
}
@Override
public String name() {
return "MemberRef";
}
@Override
public int length() {
return 4;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"classIndex\":" + classIndex)
.add("\"nameAndTypeIndex\":" + nameAndTypeIndex)
.add("\"class\":\"" + className() + "\"")
.add("\"nameAndType\":" + nameAndType())
.toString();
}
}
public class ConstantMethodRefInfo implements ConstantInfo {
private ConstantMemberRefInfo memberRefInfo;
private int index;
public ConstantMethodRefInfo(int index, ConstantMemberRefInfo memberRefInfo) {
this.index = index;
this.memberRefInfo = memberRefInfo;
}
@Override
public String name() {
return "MethodRef";
}
@Override
public int length() {
return 0;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"memberRef\":" + memberRefInfo)
.toString();
}
}
public class ConstantInterfaceMethodRefInfo implements ConstantInfo {
private ConstantMemberRefInfo memberRefInfo;
private int index;
public ConstantInterfaceMethodRefInfo(int index, ConstantMemberRefInfo memberRefInfo) {
this.index = index;
this.memberRefInfo = memberRefInfo;
}
@Override
public String name() {
return "InterfaceMethodRef";
}
@Override
public int length() {
return 0;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"memberRef\":" + memberRefInfo)
.toString();
}
}
public class ConstantNameAndTypeInfo implements ConstantInfo {
private int nameIndex;
private int descriptorIndex;
private int index;
public ConstantNameAndTypeInfo(int index, ClassReader reader) {
nameIndex = reader.readUint16();
this.index = index;
descriptorIndex = reader.readUint16();
}
@Override
public String name() {
return "NameAndType";
}
@Override
public int length() {
return 4;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"name\":\"" + getUtf8ForToString(nameIndex) + "\"")
.add("\"descriptor\":\"" + getUtf8ForToString(descriptorIndex) + "\"")
.add("\"nameIndex\":" + nameIndex)
.add("\"descriptorIndex\":" + descriptorIndex)
.toString();
}
}
public class ConstantMethodTypeInfo implements ConstantInfo {
private int descriptorIndex;
private int index;
public ConstantMethodTypeInfo(int index, ClassReader reader) {
this.index = index;
descriptorIndex = reader.readUint16();
}
@Override
public String name() {
return "MethodType";
}
@Override
public int length() {
return 2;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"descriptorIndex\":" + descriptorIndex)
.add("\"descriptor\":\"" + getUtf8ForToString(descriptorIndex) + "\"")
.toString();
}
}
public class ConstantMethodHandleInfo implements ConstantInfo {
private int referenceKind;
private int referenceIndex;
private int index;
public ConstantMethodHandleInfo(int index, ClassReader reader) {
this.index = index;
referenceKind = reader.readUint8();
referenceIndex = reader.readUint16();
}
@Override
public String name() {
return "MethodHandle";
}
@Override
public int length() {
return 6;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"referenceKind\":\"" + Opcodes.METHOD_HANDLES_NAMES[referenceKind] + "\"")
.add("\"referenceIndex\":" + referenceIndex)
.add("\"reference\":" + getConstantInfo(referenceIndex))
.toString();
}
}
public class ConstantInvokeDynamicInfo implements ConstantInfo {
private int bootstrapMethodAttrIndex;
private int nameAndTypeIndex;
private int index;
public ConstantInvokeDynamicInfo(int index, ClassReader reader) {
this.index = index;
bootstrapMethodAttrIndex = reader.readUint16();
nameAndTypeIndex = reader.readUint16();
}
public ConstantNameAndTypeInfo nameAndType() {
return getNameAndType(nameAndTypeIndex);
}
@Override
public String name() {
return "InvokeDynamic";
}
@Override
public int length() {
return 8;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"bootstrapMethodAttrIndex\":" + bootstrapMethodAttrIndex)
.add("\"nameAndTypeIndex\":" + nameAndTypeIndex)
.add("\"nameAndType\":" + nameAndType())
.toString();
}
}
public class ConstantUnkownInfo implements ConstantInfo {
private int tag;
private int index;
public ConstantUnkownInfo(int index, int tag) {
this.index = index;
this.tag = tag;
}
@Override
public String name() {
return "Unkown";
}
@Override
public int length() {
return 0;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"constant\":\"" + name() + "\"")
.add("\"length\":" + length())
.add("\"tag\":" + tag)
.toString();
}
}
}
public static class StaticConstructor implements java.lang.reflect.Member {
private static final int ACCESS_MODIFIERS =
Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE;
private final Member member;
public StaticConstructor(Member member) {
this.member = member;
}
@Override
public Class getDeclaringClass() {
return member.classFile.getThisClass();
}
@Override
public String getName() {
return member.name;
}
@Override
public int getModifiers() {
return member.accessFlags;
}
@Override
public boolean isSynthetic() {
return (member.accessFlags & 0x00001000) != 0;
}
@Override
public String toString() {
try {
StringBuilder sb = new StringBuilder();
boolean isDefault = member.isDefaultMethod();
int mod = getModifiers();
if (mod != 0 && !isDefault) {
sb.append(Modifier.toString(mod)).append(' ');
} else {
int access_mod = mod & ACCESS_MODIFIERS;
if (access_mod != 0) {
sb.append(Modifier.toString(access_mod)).append(' ');
}
if (isDefault) {
sb.append("default ");
}
mod = (mod & ~ACCESS_MODIFIERS);
if (mod != 0) {
sb.append(Modifier.toString(mod)).append(' ');
}
}
sb.append(getDeclaringClass().getTypeName());
sb.append('(');
Member.Type[] types = member.getMethodArgumentTypes();
for (int j = 0; j < types.length; j++) {
sb.append(types[j].getClassName());
if (j < (types.length - 1)) {
sb.append(",");
}
}
sb.append(')');
return sb.toString();
} catch (Exception e) {
return "<" + e + ">";
}
}
}
public static class Parameter{
private Member.Type type;
private String name;
public Member.Type getType() {
return type;
}
public String getName() {
return name;
}
@Override
public String toString() {
return name;
}
}
public static class Member {
private boolean method;
private int accessFlags;
private int nameIndex;
private int descriptorIndex;
private String name;
private String descriptorName;
private Attribute[] attributes;
private Class[] javaArgumentTypes;
private Type[] argumentTypes;
private String[] parameterNames;
private Parameter[] parameters;
private Attribute.MethodParameter[] methodParameters;
/**
* 局部变量, List, 这里存的是 List
*/
private Attribute.LocalVariable[] localVariables;
/**
* 局部变量的泛型 List, 这里存的是 ItemType
*/
private Attribute.LocalVariable[] localVariablesType;
private JavaClassFile classFile;
public int getAccessFlags() {
return accessFlags;
}
/**
* 获取入参在局部变量表的位置
*
* @return 局部变量表所在下标的数组
*/
public int[] getArgumentLocalVariableTableIndex() {
Type[] argumentTypes = getMethodArgumentTypes();
int[] lvtIndex = new int[argumentTypes.length];
int nextIndex = Modifier.isStatic(accessFlags) ? 0 : 1;//静态没有this
for (int i = 0; i < argumentTypes.length; i++) {
lvtIndex[i] = nextIndex;
if (argumentTypes[i] == Type.LONG_TYPE || argumentTypes[i] == Type.DOUBLE_TYPE) {
nextIndex += 2;
} else {
nextIndex++;
}
}
return lvtIndex;
}
public boolean isDefaultMethod() {
// Default methods are public non-abstract instance methods
// declared in an interface.
return method && ((accessFlags & (Modifier.ABSTRACT | Modifier.PUBLIC | Modifier.STATIC)) ==
Modifier.PUBLIC) && classFile.isInterface();
}
public boolean isStatic() {
return Modifier.isStatic(accessFlags);
}
public boolean isField() {
return !method;
}
public boolean isMethod() {
return method;
}
public boolean isConstructor() {
return method && "".equals(name);
}
public boolean isStaticConstructor() {
return method && isStatic() && "".equals(name);
}
public Type getFieldType() {
if (isField()) {
return Type.getType(getDescriptorName());
}
return null;
}
public Type getMethodReturnType() {
if (isMethod()) {
return Type.getReturnType(getDescriptorName());
}
return null;
}
public String getSignature() {
for (Attribute attribute : attributes) {
if (attribute.isSignature()) {
ConstantPool.ConstantUtf8Info utf8Info = (ConstantPool.ConstantUtf8Info) attribute.get("signature");
return utf8Info.value();
}
}
return null;
}
public Type getSignatureType() {
for (Attribute attribute : attributes) {
if (attribute.isSignature()) {
String signatureType = (String) attribute.get("signatureType");
return signatureType != null ? Type.getType(signatureType) : null;
}
}
return null;
}
public Class getSignatureClass() {
Type signatureType = getSignatureType();
return signatureType == null ? null : signatureType.resolveClass();
}
/**
* 获取泛型 多个嵌套那种复杂的用这个{@link #getMethodArgumentTypes}, 目前只支持单个泛型
* 自己想实现可以用原始数据自己解析 {@link #getSignature()}
*
* @return Type
*/
public Type getSignatureGenericType() {
for (Attribute attribute : attributes) {
if (attribute.isSignature()) {
String signatureGeneric = (String) attribute.get("signatureGeneric");
return signatureGeneric != null ? Type.getType(signatureGeneric) : null;
}
}
return null;
}
public Class getSignatureGenericClass() {
Type genericType = getSignatureGenericType();
return genericType == null ? null : genericType.resolveClass();
}
public Class getMethodReturnClass() {
if (isMethod()) {
return getMethodReturnType().resolveClass();
}
return null;
}
public Class getFieldClass() {
if (isField()) {
return getFieldType().resolveClass();
}
return null;
}
public Type[] getMethodArgumentTypes() {
if (argumentTypes == null) {
String signature = getSignature();
if (signature != null) {
int open = signature.indexOf('(');
int close = signature.lastIndexOf(')');
String substring = signature.substring(open == -1 ? 0 : open, close == -1 ? signature.length() : close + 1);
argumentTypes = Type.getArgumentTypes(substring);
} else if (isMethod()) {
argumentTypes = Type.getArgumentTypes(getDescriptorName());
}
}
return argumentTypes;
}
public Class[] getMethodArgumentClasses() {
if (javaArgumentTypes == null) {
Type[] argumentTypes = getMethodArgumentTypes();
Class[] javaArgumentTypes = new Class[argumentTypes.length];
for (int i = 0; i < argumentTypes.length; i++) {
javaArgumentTypes[i] = argumentTypes[i].resolveClass();
}
this.javaArgumentTypes = javaArgumentTypes;
}
return javaArgumentTypes;
}
public java.lang.reflect.Member toJavaMember() {
Class target = classFile.getThisClass();
if (isMethod()) {
Class[] argumentTypes = getMethodArgumentClasses();
try {
if (isConstructor()) {
return target.getDeclaredConstructor(argumentTypes);
} else if (isStaticConstructor()) {
return new StaticConstructor(this);
} else if (isStatic()) {
return target.getMethod(name, argumentTypes);
} else {
return target.getDeclaredMethod(name, argumentTypes);
}
} catch (NoSuchMethodException e) {
throw new IllegalStateException("toJavaMember error ", e);
}
} else {
try {
return target.getDeclaredField(name);
} catch (NoSuchFieldException e) {
throw new IllegalStateException("toJavaMember error ", e);
}
}
}
public Parameter[] getParameters() {
if (this.parameters == null) {
String[] parameterNames = getParameterNames();
Type[] methodArgumentTypes = getMethodArgumentTypes();
Parameter[] parameters = new Parameter[parameterNames.length];
for (int i = 0; i < parameters.length; i++) {
parameters[i] = new Parameter();
parameters[i].name = parameterNames[i];
parameters[i].type = methodArgumentTypes[i];
}
this.parameters = parameters;
}
return parameters;
}
public String[] getParameterNames() {
if (this.parameterNames == null) {
String[] parameterNames;
//获取入参在局部变量表的位置
int[] lvtIndices = getArgumentLocalVariableTableIndex();
if (lvtIndices.length == 0) {
parameterNames = EMPTY_STRING;
} else {
Attribute.LocalVariable[] localVariableTable = getLocalVariableTable();
if (localVariableTable == null || localVariableTable.length == 0) {
parameterNames = EMPTY_STRING;
} else {
parameterNames = new String[lvtIndices.length];
//变量局部变量表
for (int i = 0; i < localVariableTable.length; i++) {
int localVariableIndex = localVariableTable[i].index();
//根据入参位置,寻找方法入参的变量名称
for (int j = 0; j < lvtIndices.length; j++) {
if (localVariableIndex == lvtIndices[j]) {
parameterNames[j] = localVariableTable[i].name();
break;
}
}
}
}
}
this.parameterNames = parameterNames;
}
return this.parameterNames;
}
public String getName() {
return name;
}
public String getDescriptorName() {
return descriptorName;
}
public Attribute.LocalVariable[] getLocalVariableTable() {
if (localVariables == null) {
localVariables = findLocalVariable();
}
return localVariables;
}
public Attribute.LocalVariable[] getLocalVariableTypeTable() {
if (localVariablesType == null) {
localVariablesType = findLocalVariableTypeTable();
}
return localVariablesType;
}
public Attribute.MethodParameter[] getMethodParameters() {
if (methodParameters == null) {
methodParameters = findMethodParameters();
}
return methodParameters;
}
public Opcodes getOpcodes() {
if (this.attributes != null) {
for (Attribute attributeInfo : this.attributes) {
if (attributeInfo.isAttrCode()) {
return attributeInfo.getOpcodes();
}
}
}
return null;
}
public Attribute.CodeException[] getExceptionTable() {
if (this.attributes != null) {
for (Attribute attributeInfo : this.attributes) {
if (attributeInfo.isAttrCode()) {
return (Attribute.CodeException[]) attributeInfo.get("exceptionTable");
}
}
}
return null;
}
public Integer getMaxStack() {
if (this.attributes != null) {
for (Attribute attributeInfo : this.attributes) {
if (attributeInfo.isAttrCode()) {
return (Integer) attributeInfo.get("maxStack");
}
}
}
return null;
}
public Integer getMaxLocals() {
if (this.attributes != null) {
for (Attribute attributeInfo : this.attributes) {
if (attributeInfo.isAttrCode()) {
return (Integer) attributeInfo.get("maxLocals");
}
}
}
return null;
}
public Attribute.LineNumber[] getLineNumberTable() {
if (this.attributes != null) {
for (Attribute attributeInfo : this.attributes) {
if (!attributeInfo.isAttrCode()) {
continue;
}
Attribute[] codeAttributes = attributeInfo.attributes();
for (Attribute codeAttributeInfo : codeAttributes) {
if (codeAttributeInfo.isLineNumberTable()) {
return (Attribute.LineNumber[]) codeAttributeInfo.get("lineNumberTable");
}
}
}
}
return null;
}
public Attribute.StackMapFrame[] getStackMapTable() {
if (this.attributes != null) {
for (Attribute attributeInfo : this.attributes) {
if (!attributeInfo.isAttrCode()) {
continue;
}
Attribute[] codeAttributes = attributeInfo.attributes();
for (Attribute codeAttributeInfo : codeAttributes) {
if (codeAttributeInfo.isStackMapTable()) {
return (Attribute.StackMapFrame[]) codeAttributeInfo.get("entries");
}
}
}
}
return null;
}
public Attribute.Annotation[] getRuntimeVisibleAnnotations() {
if (this.attributes != null) {
for (Attribute attributeInfo : this.attributes) {
if (attributeInfo.isRuntimeVisibleAnnotations()) {
return (Attribute.Annotation[]) attributeInfo.get("annotations");
}
}
}
return null;
}
private Attribute.LocalVariable[] findLocalVariable() {
if (this.attributes == null) {
return EMPTY_LOCAL_VARIABLE_TABLE;
}
for (Attribute attributeInfo : this.attributes) {
if (!attributeInfo.isAttrCode()) {
continue;
}
Attribute[] codeAttributes = attributeInfo.attributes();
for (Attribute codeAttributeInfo : codeAttributes) {
if (codeAttributeInfo.isAttrLocalVariableTable()) {
return codeAttributeInfo.localVariableTable();
}
}
return EMPTY_LOCAL_VARIABLE_TABLE;
}
return EMPTY_LOCAL_VARIABLE_TABLE;
}
private Attribute.LocalVariable[] findLocalVariableTypeTable() {
if (this.attributes == null) {
return EMPTY_LOCAL_VARIABLE_TABLE;
}
for (Attribute attributeInfo : this.attributes) {
if (!attributeInfo.isAttrCode()) {
continue;
}
Attribute[] codeAttributes = attributeInfo.attributes();
for (Attribute codeAttributeInfo : codeAttributes) {
if (codeAttributeInfo.isAttrLocalVariableTypeTable()) {
return codeAttributeInfo.localVariableTable();
}
}
return EMPTY_LOCAL_VARIABLE_TABLE;
}
return EMPTY_LOCAL_VARIABLE_TABLE;
}
private Attribute.MethodParameter[] findMethodParameters() {
if (this.attributes == null) {
return EMPTY_METHOD_PARAMETER;
}
for (Attribute attributeInfo : this.attributes) {
if (attributeInfo.isMethodParameters()) {
return attributeInfo.methodParameters();
}
}
return EMPTY_METHOD_PARAMETER;
}
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(",", "{", "}");
joiner.add("\"accessFlags\":\"" + Modifier.toString(accessFlags) + "\"");
joiner.add("\"name\":\"" + getName() + "\"");
joiner.add("\"getDescriptorName\":\"" + getDescriptorName() + "\"");
joiner.add("\"attributes\":" + toJsonArray(attributes));
return joiner.toString();
}
public static final class Type {
/**
* The sort of the {@code void} type. See {@link #getSort}.
*/
public static final int VOID = 0;
/**
* The sort of the {@code boolean} type. See {@link #getSort}.
*/
public static final int BOOLEAN = 1;
/**
* The sort of the {@code char} type. See {@link #getSort}.
*/
public static final int CHAR = 2;
/**
* The sort of the {@code byte} type. See {@link #getSort}.
*/
public static final int BYTE = 3;
/**
* The sort of the {@code short} type. See {@link #getSort}.
*/
public static final int SHORT = 4;
/**
* The sort of the {@code int} type. See {@link #getSort}.
*/
public static final int INT = 5;
/**
* The sort of the {@code float} type. See {@link #getSort}.
*/
public static final int FLOAT = 6;
/**
* The sort of the {@code long} type. See {@link #getSort}.
*/
public static final int LONG = 7;
/**
* The sort of the {@code double} type. See {@link #getSort}.
*/
public static final int DOUBLE = 8;
/**
* The sort of array reference types. See {@link #getSort}.
*/
public static final int ARRAY = 9;
/**
* The sort of object reference types. See {@link #getSort}.
*/
public static final int OBJECT = 10;
/**
* The sort of method types. See {@link #getSort}.
*/
public static final int METHOD = 11;
/**
* The (private) sort of object reference types represented with an internal name.
*/
public static final int INTERNAL = 12;
/**
* The sort of object reference types. See {@link #getSort}.
*/
public static final int OBJECT_REF = 13;
/**
* The generic type
*/
public static final int GENERIC_TYPE_NAME = 14;
/**
* The descriptors of the primitive types.
*/
private static final String PRIMITIVE_DESCRIPTORS = "VZCBSIFJD";
/**
* The {@code void} type.
*/
public static final Type VOID_TYPE = new Type(VOID, PRIMITIVE_DESCRIPTORS, VOID, VOID + 1);
/**
* The {@code boolean} type.
*/
public static final Type BOOLEAN_TYPE =
new Type(BOOLEAN, PRIMITIVE_DESCRIPTORS, BOOLEAN, BOOLEAN + 1);
/**
* The {@code char} type.
*/
public static final Type CHAR_TYPE = new Type(CHAR, PRIMITIVE_DESCRIPTORS, CHAR, CHAR + 1);
/**
* The {@code byte} type.
*/
public static final Type BYTE_TYPE = new Type(BYTE, PRIMITIVE_DESCRIPTORS, BYTE, BYTE + 1);
/**
* The {@code short} type.
*/
public static final Type SHORT_TYPE = new Type(SHORT, PRIMITIVE_DESCRIPTORS, SHORT, SHORT + 1);
/**
* The {@code int} type.
*/
public static final Type INT_TYPE = new Type(INT, PRIMITIVE_DESCRIPTORS, INT, INT + 1);
/**
* The {@code float} type.
*/
public static final Type FLOAT_TYPE = new Type(FLOAT, PRIMITIVE_DESCRIPTORS, FLOAT, FLOAT + 1);
/**
* The {@code long} type.
*/
public static final Type LONG_TYPE = new Type(LONG, PRIMITIVE_DESCRIPTORS, LONG, LONG + 1);
/**
* The {@code double} type.
*/
public static final Type DOUBLE_TYPE =
new Type(DOUBLE, PRIMITIVE_DESCRIPTORS, DOUBLE, DOUBLE + 1);
/**
* Suffix for array class names: {@code "[]"}.
*/
private static final String ARRAY_SUFFIX = "[]";
/**
* Prefix for internal array class names: {@code "["}.
*/
private static final String INTERNAL_ARRAY_PREFIX = "[";
/**
* Prefix for internal non-primitive array class names: {@code "[L"}.
*/
private static final String NON_PRIMITIVE_ARRAY_PREFIX = "[L";
/**
* The package separator character: {@code '.'}.
*/
private static final char PACKAGE_SEPARATOR = '.';
/**
* Map with primitive wrapper type as key and corresponding primitive
* type as value, for example: Integer.class -> int.class.
*/
private static final Map, Class> PRIMITIVE_WRAPPER_TYPE_MAP = new IdentityHashMap<>(8);
/**
* Map with primitive type name as key and corresponding primitive
* type as value, for example: "int" -> "int.class".
*/
private static final Map> PRIMITIVE_TYPE_NAME_MAP = new HashMap<>(32);
/**
* Map with common Java language class name as key and corresponding Class as value.
* Primarily for efficient deserialization of remote invocations.
*/
private static final Map> COMMON_CLASS_CACHE = new HashMap<>(64);
static {
PRIMITIVE_WRAPPER_TYPE_MAP.put(Boolean.class, boolean.class);
PRIMITIVE_WRAPPER_TYPE_MAP.put(Byte.class, byte.class);
PRIMITIVE_WRAPPER_TYPE_MAP.put(Character.class, char.class);
PRIMITIVE_WRAPPER_TYPE_MAP.put(Double.class, double.class);
PRIMITIVE_WRAPPER_TYPE_MAP.put(Float.class, float.class);
PRIMITIVE_WRAPPER_TYPE_MAP.put(Integer.class, int.class);
PRIMITIVE_WRAPPER_TYPE_MAP.put(Long.class, long.class);
PRIMITIVE_WRAPPER_TYPE_MAP.put(Short.class, short.class);
// Map entry iteration is less expensive to initialize than forEach with lambdas
for (Map.Entry, Class> entry : PRIMITIVE_WRAPPER_TYPE_MAP.entrySet()) {
registerCommonClasses(entry.getKey());
}
Set> primitiveTypes = new HashSet<>(32);
primitiveTypes.addAll(PRIMITIVE_WRAPPER_TYPE_MAP.values());
Collections.addAll(primitiveTypes, boolean[].class, byte[].class, char[].class,
double[].class, float[].class, int[].class, long[].class, short[].class);
primitiveTypes.add(void.class);
for (Class primitiveType : primitiveTypes) {
PRIMITIVE_TYPE_NAME_MAP.put(primitiveType.getName(), primitiveType);
}
registerCommonClasses(Boolean[].class, Byte[].class, Character[].class, Double[].class,
Float[].class, Integer[].class, Long[].class, Short[].class);
registerCommonClasses(Number.class, Number[].class, String.class, String[].class,
Class.class, Class[].class, Object.class, Object[].class);
registerCommonClasses(Throwable.class, Exception.class, RuntimeException.class,
Error.class, StackTraceElement.class, StackTraceElement[].class);
registerCommonClasses(Enum.class, Iterable.class, Iterator.class, Enumeration.class,
Collection.class, List.class, Set.class, Map.class, Map.Entry.class, Optional.class);
Class[] javaLanguageInterfaceArray = {Serializable.class, Externalizable.class,
Closeable.class, AutoCloseable.class, Cloneable.class, Comparable.class};
registerCommonClasses(javaLanguageInterfaceArray);
}
/**
* The sort of this type. Either {@link #VOID}, {@link #BOOLEAN}, {@link #CHAR}, {@link #BYTE},
* {@link #SHORT}, {@link #INT}, {@link #FLOAT}, {@link #LONG}, {@link #DOUBLE}, {@link #ARRAY},
* {@link #OBJECT}, {@link #METHOD} or {@link #INTERNAL}.
*/
private final int sort;
/**
* A buffer containing the value of this field or method type. This value is an internal name for
* {@link #OBJECT} and {@link #INTERNAL} types, and a field or method descriptor in the other
* cases.
*
* For {@link #OBJECT} types, this field also contains the descriptor: the characters in
* [{@link #valueBegin},{@link #valueEnd}) contain the internal name, and those in [{@link
* #valueBegin} - 1, {@link #valueEnd} + 1) contain the descriptor.
*/
private final String valueBuffer;
/**
* The beginning index, inclusive, of the value of this Java field or method type in {@link
* #valueBuffer}. This value is an internal name for {@link #OBJECT} and {@link #INTERNAL} types,
* and a field or method descriptor in the other cases.
*/
private final int valueBegin;
/**
* The end index, exclusive, of the value of this Java field or method type in {@link
* #valueBuffer}. This value is an internal name for {@link #OBJECT} and {@link #INTERNAL} types,
* and a field or method descriptor in the other cases.
*/
private final int valueEnd;
private static final Type[] EMPTY_GENERIC_TYPES = {};
private Type[] genericTypes = EMPTY_GENERIC_TYPES;
// -----------------------------------------------------------------------------------------------
// Fields
// -----------------------------------------------------------------------------------------------
/**
* Constructs a reference type.
*
* @param sort the sort of this type, see {@link #sort}.
* @param valueBuffer a buffer containing the value of this field or method type.
* @param valueBegin the beginning index, inclusive, of the value of this field or method type in
* valueBuffer.
* @param valueEnd the end index, exclusive, of the value of this field or method type in
* valueBuffer.
*/
private Type(final int sort, final String valueBuffer, final int valueBegin, final int valueEnd) {
this.sort = sort;
this.valueBuffer = valueBuffer;
this.valueBegin = valueBegin;
this.valueEnd = valueEnd;
}
public Type[] getGenericTypes() {
return genericTypes;
}
public Type getGenericType(int index) {
if (index >= 0 && index < genericTypes.length) {
return genericTypes[index];
} else {
return null;
}
}
public Class resolveGenericClass(int index) {
if (index >= 0 && index < genericTypes.length) {
return genericTypes[index].resolveClass();
} else {
return null;
}
}
private void addGenericTypes(Type type) {
genericTypes = Arrays.copyOf(genericTypes, genericTypes.length + 1);
genericTypes[genericTypes.length - 1] = type;
}
private static Class resolvePrimitiveClassName(String name) {
Class result = null;
// Most class names will be quite long, considering that they
// SHOULD sit in a package, so a length check is worthwhile.
if (name != null && name.length() <= 8) {
// Could be a primitive - likely.
result = PRIMITIVE_TYPE_NAME_MAP.get(name);
}
return result;
}
public static Class forName(String name, ClassLoader classLoader)
throws ClassNotFoundException, LinkageError {
Class clazz = resolvePrimitiveClassName(name);
if (clazz == null) {
clazz = COMMON_CLASS_CACHE.get(name);
}
if (clazz != null) {
return clazz;
}
// "java.lang.String[]" style arrays
if (name.endsWith(ARRAY_SUFFIX)) {
String elementClassName = name.substring(0, name.length() - ARRAY_SUFFIX.length());
Class elementClass = forName(elementClassName, classLoader);
return Array.newInstance(elementClass, 0).getClass();
}
// "[Ljava.lang.String;" style arrays
if (name.startsWith(NON_PRIMITIVE_ARRAY_PREFIX) && name.endsWith(";")) {
String elementName = name.substring(NON_PRIMITIVE_ARRAY_PREFIX.length(), name.length() - 1);
Class elementClass = forName(elementName, classLoader);
return Array.newInstance(elementClass, 0).getClass();
}
// "[[I" or "[[Ljava.lang.String;" style arrays
if (name.startsWith(INTERNAL_ARRAY_PREFIX)) {
String elementName = name.substring(INTERNAL_ARRAY_PREFIX.length());
Class elementClass = forName(elementName, classLoader);
return Array.newInstance(elementClass, 0).getClass();
}
ClassLoader clToUse = classLoader;
if (clToUse == null) {
clToUse = getDefaultClassLoader();
}
try {
return Class.forName(name, false, clToUse);
} catch (ClassNotFoundException ex) {
int lastDotIndex = name.lastIndexOf(PACKAGE_SEPARATOR);
if (lastDotIndex != -1) {
String innerClassName =
name.substring(0, lastDotIndex) + '$' + name.substring(lastDotIndex + 1);
try {
return Class.forName(innerClassName, false, clToUse);
} catch (ClassNotFoundException ex2) {
// Swallow - let original exception get through
}
}
throw ex;
}
}
public static ClassLoader getDefaultClassLoader() {
ClassLoader cl = null;
try {
cl = Thread.currentThread().getContextClassLoader();
} catch (Throwable ex) {
// Cannot access thread context ClassLoader - falling back...
}
if (cl == null) {
// No thread context class loader -> use class loader of this class.
cl = Type.class.getClassLoader();
if (cl == null) {
// getClassLoader() returning null indicates the bootstrap ClassLoader
try {
cl = ClassLoader.getSystemClassLoader();
} catch (Throwable ex) {
// Cannot access system ClassLoader - oh well, maybe the caller can live with null...
}
}
}
return cl;
}
private static void registerCommonClasses(Class... commonClasses) {
for (Class clazz : commonClasses) {
COMMON_CLASS_CACHE.put(clazz.getName(), clazz);
}
}
// -----------------------------------------------------------------------------------------------
// Methods to get Type(s) from a descriptor, a reflected Method or Constructor, other types, etc.
// -----------------------------------------------------------------------------------------------
/**
* Returns the {@link Type} corresponding to the given type descriptor.
*
* @param typeDescriptor a field or method type descriptor.
* @return the {@link Type} corresponding to the given type descriptor.
*/
public static Type getType(final String typeDescriptor) {
return getTypeInternal(typeDescriptor, 0, typeDescriptor.length());
}
/**
* Returns the {@link Type} corresponding to the given class.
*
* @param clazz a class.
* @return the {@link Type} corresponding to the given class.
*/
public static Type getType(final Class clazz) {
if (clazz.isPrimitive()) {
if (clazz == Integer.TYPE) {
return INT_TYPE;
} else if (clazz == Void.TYPE) {
return VOID_TYPE;
} else if (clazz == Boolean.TYPE) {
return BOOLEAN_TYPE;
} else if (clazz == Byte.TYPE) {
return BYTE_TYPE;
} else if (clazz == Character.TYPE) {
return CHAR_TYPE;
} else if (clazz == Short.TYPE) {
return SHORT_TYPE;
} else if (clazz == Double.TYPE) {
return DOUBLE_TYPE;
} else if (clazz == Float.TYPE) {
return FLOAT_TYPE;
} else if (clazz == Long.TYPE) {
return LONG_TYPE;
} else {
throw new AssertionError();
}
} else {
return getType(getDescriptor(clazz));
}
}
/**
* Returns the method {@link Type} corresponding to the given constructor.
*
* @param constructor a {@link Constructor} object.
* @return the method {@link Type} corresponding to the given constructor.
*/
public static Type getType(final Constructor constructor) {
return getType(getConstructorDescriptor(constructor));
}
/**
* Returns the method {@link Type} corresponding to the given method.
*
* @param method a {@link Method} object.
* @return the method {@link Type} corresponding to the given method.
*/
public static Type getType(final Method method) {
return getType(getMethodDescriptor(method));
}
/**
* Returns the {@link Type} corresponding to the given internal name.
*
* @param internalName an internal name.
* @return the {@link Type} corresponding to the given internal name.
*/
public static Type getObjectType(final String internalName) {
return new Type(
internalName.charAt(0) == '[' ? ARRAY : INTERNAL, internalName, 0, internalName.length());
}
/**
* Returns the {@link Type} corresponding to the given method descriptor. Equivalent to
* Type.getType(methodDescriptor).
*
* @param methodDescriptor a method descriptor.
* @return the {@link Type} corresponding to the given method descriptor.
*/
public static Type getMethodType(final String methodDescriptor) {
return new Type(METHOD, methodDescriptor, 0, methodDescriptor.length());
}
/**
* Returns the method {@link Type} corresponding to the given argument and return types.
*
* @param returnType the return type of the method.
* @param argumentTypes the argument types of the method.
* @return the method {@link Type} corresponding to the given argument and return types.
*/
public static Type getMethodType(final Type returnType, final Type... argumentTypes) {
return getType(getMethodDescriptor(returnType, argumentTypes));
}
/**
* Returns the {@link Type} values corresponding to the argument types of the given method
* descriptor.
*
* @param methodDescriptor a method descriptor.
* @return the {@link Type} values corresponding to the argument types of the given method
* descriptor.
*/
public static Type[] getArgumentTypes(final String methodDescriptor) {
// Second step: create a Type instance for each argument type.
List argumentTypes = null;
// Skip the first character, which is always a '('.
int currentOffset = 1;
while (methodDescriptor != null && methodDescriptor.charAt(currentOffset) != ')') {
final int currentArgumentTypeOffset = currentOffset;
while (methodDescriptor.charAt(currentOffset) == '[') {
currentOffset++;
}
int genericCount = 0;
if (methodDescriptor.charAt(currentOffset++) == 'L') {
// Skip the argument descriptor content.
while (true) {
char c1 = methodDescriptor.charAt(currentOffset);
if (c1 == '<') {
int currentGenericCount = 0;
int typeOffsetEnd = currentArgumentTypeOffset;
List typeList = new ArrayList<>();
Type root = null;
while (true) {
char c = methodDescriptor.charAt(currentOffset);
if (c == '<') {
addGenericType(typeList, methodDescriptor, typeOffsetEnd, currentOffset);
if (root == null) {
root = typeList.get(0);
}
typeOffsetEnd = currentOffset + 1;
currentGenericCount++;
genericCount++;
} else if (c == '>') {
addGenericType(typeList, methodDescriptor, typeOffsetEnd, currentOffset - 1);
typeList.remove(typeList.size() - 1);
typeOffsetEnd = currentOffset;
currentGenericCount--;
} else if (currentGenericCount == 0) {
break;
}
currentOffset++;
}
if (argumentTypes == null) {
argumentTypes = new ArrayList<>(3);
}
argumentTypes.add(root);
} else if (c1 == ';') {
currentOffset++;
break;
} else {
currentOffset++;
}
}
}
if (genericCount == 0) {
if (argumentTypes == null) {
argumentTypes = new ArrayList<>(3);
}
argumentTypes.add(getTypeInternal(methodDescriptor, currentArgumentTypeOffset, currentOffset));
}
}
return argumentTypes == null ? EMPTY_TYPE : argumentTypes.toArray(new Type[argumentTypes.size()]);
}
private static void addGenericType(List typeList, String methodDescriptor, int begin, int end) {
String descriptor = methodDescriptor.substring(begin, end);
if (">".equals(descriptor)) {
return;
}
descriptor = descriptor.concat(";");
Type type = getTypeInternal(descriptor, 0, descriptor.length());
if (!typeList.isEmpty()) {
typeList.get(typeList.size() - 1).addGenericTypes(type);
}
typeList.add(type);
}
/**
* Returns the {@link Type} values corresponding to the argument types of the given method.
*
* @param method a method.
* @return the {@link Type} values corresponding to the argument types of the given method.
*/
public static Type[] getArgumentTypes(final Method method) {
Class[] classes = method.getParameterTypes();
Type[] types = new Type[classes.length];
for (int i = classes.length - 1; i >= 0; --i) {
types[i] = getType(classes[i]);
}
return types;
}
/**
* Returns the {@link Type} corresponding to the return type of the given method descriptor.
*
* @param methodDescriptor a method descriptor.
* @return the {@link Type} corresponding to the return type of the given method descriptor.
*/
public static Type getReturnType(final String methodDescriptor) {
// Skip the first character, which is always a '('.
int currentOffset = 1;
// Skip the argument types, one at a each loop iteration.
while (methodDescriptor.charAt(currentOffset) != ')') {
while (methodDescriptor.charAt(currentOffset) == '[') {
currentOffset++;
}
if (methodDescriptor.charAt(currentOffset++) == 'L') {
// Skip the argument descriptor content.
currentOffset = methodDescriptor.indexOf(';', currentOffset) + 1;
}
}
return getTypeInternal(methodDescriptor, currentOffset + 1, methodDescriptor.length());
}
/**
* Returns the {@link Type} corresponding to the return type of the given method.
*
* @param method a method.
* @return the {@link Type} corresponding to the return type of the given method.
*/
public static Type getReturnType(final Method method) {
return getType(method.getReturnType());
}
/**
* Returns the {@link Type} corresponding to the given field or method descriptor.
*
* @param descriptorBuffer a buffer containing the field or method descriptor.
* @param descriptorBegin the beginning index, inclusive, of the field or method descriptor in
* descriptorBuffer.
* @param descriptorEnd the end index, exclusive, of the field or method descriptor in
* descriptorBuffer.
* @return the {@link Type} corresponding to the given type descriptor.
*/
private static Type getTypeInternal(
final String descriptorBuffer, final int descriptorBegin, final int descriptorEnd) {
switch (descriptorBuffer.charAt(descriptorBegin)) {
case 'V':
return VOID_TYPE;
case 'Z':
return BOOLEAN_TYPE;
case 'C':
return CHAR_TYPE;
case 'B':
return BYTE_TYPE;
case 'S':
return SHORT_TYPE;
case 'I':
return INT_TYPE;
case 'F':
return FLOAT_TYPE;
case 'J':
return LONG_TYPE;
case 'D':
return DOUBLE_TYPE;
case '[':
return new Type(ARRAY, descriptorBuffer, descriptorBegin, descriptorEnd);
case 'L':
return new Type(OBJECT, descriptorBuffer, descriptorBegin + 1, descriptorEnd - 1);
case '*':
return new Type(OBJECT_REF, descriptorBuffer, descriptorBegin + 2, descriptorEnd - 1);
case '(':
return new Type(METHOD, descriptorBuffer, descriptorBegin, descriptorEnd);
case 'T':
return new Type(GENERIC_TYPE_NAME, descriptorBuffer, descriptorBegin + 1, descriptorEnd - 1);
default:
throw new IllegalArgumentException();
}
}
/**
* Returns the internal name of the given class. The internal name of a class is its fully
* qualified name, as returned by Class.getName(), where '.' are replaced by '/'.
*
* @param clazz an object or array class.
* @return the internal name of the given class.
*/
public static String getInternalName(final Class clazz) {
return clazz.getName().replace('.', '/');
}
/**
* Returns the descriptor corresponding to the given class.
*
* @param clazz an object class, a primitive class or an array class.
* @return the descriptor corresponding to the given class.
*/
public static String getDescriptor(final Class clazz) {
StringBuilder stringBuilder = new StringBuilder();
appendDescriptor(clazz, stringBuilder);
return stringBuilder.toString();
}
/**
* Returns the descriptor corresponding to the given constructor.
*
* @param constructor a {@link Constructor} object.
* @return the descriptor of the given constructor.
*/
public static String getConstructorDescriptor(final Constructor constructor) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append('(');
Class[] parameters = constructor.getParameterTypes();
for (Class parameter : parameters) {
appendDescriptor(parameter, stringBuilder);
}
return stringBuilder.append(")V").toString();
}
/**
* Returns the descriptor corresponding to the given argument and return types.
*
* @param returnType the return type of the method.
* @param argumentTypes the argument types of the method.
* @return the descriptor corresponding to the given argument and return types.
*/
public static String getMethodDescriptor(final Type returnType, final Type... argumentTypes) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append('(');
for (Type argumentType : argumentTypes) {
argumentType.appendDescriptor(stringBuilder);
}
stringBuilder.append(')');
returnType.appendDescriptor(stringBuilder);
return stringBuilder.toString();
}
// -----------------------------------------------------------------------------------------------
// Methods to get class names, internal names or descriptors.
// -----------------------------------------------------------------------------------------------
/**
* Returns the descriptor corresponding to the given method.
*
* @param method a {@link Method} object.
* @return the descriptor of the given method.
*/
public static String getMethodDescriptor(final Method method) {
return getMethodDescriptor(method.getParameterTypes(), method.getReturnType());
}
public static String getMethodDescriptor(Class[] parameterTypes, Class returnType) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append('(');
for (Class parameter : parameterTypes) {
appendDescriptor(parameter, stringBuilder);
}
stringBuilder.append(')');
appendDescriptor(returnType, stringBuilder);
return stringBuilder.toString();
}
/**
* Appends the descriptor of the given class to the given string builder.
*
* @param clazz the class whose descriptor must be computed.
* @param stringBuilder the string builder to which the descriptor must be appended.
*/
private static void appendDescriptor(final Class clazz, final StringBuilder stringBuilder) {
Class currentClass = clazz;
while (currentClass.isArray()) {
stringBuilder.append('[');
currentClass = currentClass.getComponentType();
}
if (currentClass.isPrimitive()) {
char descriptor;
if (currentClass == Integer.TYPE) {
descriptor = 'I';
} else if (currentClass == Void.TYPE) {
descriptor = 'V';
} else if (currentClass == Boolean.TYPE) {
descriptor = 'Z';
} else if (currentClass == Byte.TYPE) {
descriptor = 'B';
} else if (currentClass == Character.TYPE) {
descriptor = 'C';
} else if (currentClass == Short.TYPE) {
descriptor = 'S';
} else if (currentClass == Double.TYPE) {
descriptor = 'D';
} else if (currentClass == Float.TYPE) {
descriptor = 'F';
} else if (currentClass == Long.TYPE) {
descriptor = 'J';
} else {
throw new AssertionError();
}
stringBuilder.append(descriptor);
} else {
stringBuilder.append('L');
String name = currentClass.getName();
int nameLength = name.length();
for (int i = 0; i < nameLength; ++i) {
char car = name.charAt(i);
stringBuilder.append(car == '.' ? '/' : car);
}
stringBuilder.append(';');
}
}
/**
* Computes the size of the arguments and of the return value of a method.
*
* @param methodDescriptor a method descriptor.
* @return the size of the arguments of the method (plus one for the implicit this argument),
* argumentsSize, and the size of its return value, returnSize, packed into a single int i =
* {@code (argumentsSize << 2) | returnSize} (argumentsSize is therefore equal to {@code
* i >> 2}, and returnSize to {@code i & 0x03}).
*/
public static int getArgumentsAndReturnSizes(final String methodDescriptor) {
int argumentsSize = 1;
// Skip the first character, which is always a '('.
int currentOffset = 1;
int currentChar = methodDescriptor.charAt(currentOffset);
// Parse the argument types and compute their size, one at a each loop iteration.
while (currentChar != ')') {
if (currentChar == 'J' || currentChar == 'D') {
currentOffset++;
argumentsSize += 2;
} else {
while (methodDescriptor.charAt(currentOffset) == '[') {
currentOffset++;
}
if (methodDescriptor.charAt(currentOffset++) == 'L') {
// Skip the argument descriptor content.
currentOffset = methodDescriptor.indexOf(';', currentOffset) + 1;
}
argumentsSize += 1;
}
currentChar = methodDescriptor.charAt(currentOffset);
}
currentChar = methodDescriptor.charAt(currentOffset + 1);
if (currentChar == 'V') {
return argumentsSize << 2;
} else {
int returnSize = (currentChar == 'J' || currentChar == 'D') ? 2 : 1;
return argumentsSize << 2 | returnSize;
}
}
/**
* Returns the type of the elements of this array type. This method should only be used for an
* array type.
*
* @return Returns the type of the elements of this array type.
*/
public Type getElementType() {
final int numDimensions = getDimensions();
return getTypeInternal(valueBuffer, valueBegin + numDimensions, valueEnd);
}
/**
* Returns the argument types of methods of this type. This method should only be used for method
* types.
*
* @return the argument types of methods of this type.
*/
public Type[] getArgumentTypes() {
return getArgumentTypes(getDescriptor());
}
/**
* Returns the return type of methods of this type. This method should only be used for method
* types.
*
* @return the return type of methods of this type.
*/
public Type getReturnType() {
return getReturnType(getDescriptor());
}
public Class resolveClass() {
String className = getClassName();
try {
return forName(className, null);
} catch (IllegalAccessError err) {
throw new IllegalStateException("Readability mismatch in inheritance hierarchy of class [" +
className + "]: " + err.getMessage(), err);
} catch (LinkageError err) {
throw new IllegalArgumentException("Unresolvable class definition for class [" + className + "]", err);
} catch (ClassNotFoundException ex) {
throw new IllegalArgumentException("Could not find class [" + className + "]", ex);
}
}
/**
* Returns the binary name of the class corresponding to this type. This method must not be used
* on method types.
*
* @return the binary name of the class corresponding to this type.
*/
public String getClassName() {
switch (sort) {
case VOID:
return "void";
case BOOLEAN:
return "boolean";
case CHAR:
return "char";
case BYTE:
return "byte";
case SHORT:
return "short";
case INT:
return "int";
case FLOAT:
return "float";
case LONG:
return "long";
case DOUBLE:
return "double";
case ARRAY:
StringBuilder stringBuilder = new StringBuilder(getElementType().getClassName());
for (int i = getDimensions(); i > 0; --i) {
stringBuilder.append("[]");
}
return stringBuilder.toString();
case OBJECT:
case INTERNAL:
return valueBuffer.substring(valueBegin, valueEnd).replace('/', '.');
default:
throw new AssertionError();
}
}
/**
* Returns the internal name of the class corresponding to this object or array type. The internal
* name of a class is its fully qualified name (as returned by Class.getName(), where '.' are
* replaced by '/'). This method should only be used for an object or array type.
*
* @return the internal name of the class corresponding to this object type.
*/
public String getInternalName() {
return valueBuffer.substring(valueBegin, valueEnd);
}
/**
* Returns the descriptor corresponding to this type.
*
* @return the descriptor corresponding to this type.
*/
public String getDescriptor() {
if (sort == OBJECT) {
return valueBuffer.substring(valueBegin - 1, valueEnd + 1);
} else if (sort == INTERNAL) {
return new StringBuilder()
.append('L')
.append(valueBuffer, valueBegin, valueEnd)
.append(';')
.toString();
} else {
return valueBuffer.substring(valueBegin, valueEnd);
}
}
// -----------------------------------------------------------------------------------------------
// Methods to get the sort, dimension, size, and opcodes corresponding to a Type or descriptor.
// -----------------------------------------------------------------------------------------------
/**
* Appends the descriptor corresponding to this type to the given string buffer.
*
* @param stringBuilder the string builder to which the descriptor must be appended.
*/
private void appendDescriptor(final StringBuilder stringBuilder) {
if (sort == OBJECT) {
stringBuilder.append(valueBuffer, valueBegin - 1, valueEnd + 1);
} else if (sort == INTERNAL) {
stringBuilder.append('L').append(valueBuffer, valueBegin, valueEnd).append(';');
} else {
stringBuilder.append(valueBuffer, valueBegin, valueEnd);
}
}
/**
* Returns the sort of this type.
*
* @return {@link #VOID}, {@link #BOOLEAN}, {@link #CHAR}, {@link #BYTE}, {@link #SHORT}, {@link
* #INT}, {@link #FLOAT}, {@link #LONG}, {@link #DOUBLE}, {@link #ARRAY}, {@link #OBJECT} or
* {@link #METHOD}.
*/
public int getSort() {
return sort == INTERNAL ? OBJECT : sort;
}
/**
* Returns the number of dimensions of this array type. This method should only be used for an
* array type.
*
* @return the number of dimensions of this array type.
*/
public int getDimensions() {
int numDimensions = 1;
while (valueBuffer.charAt(valueBegin + numDimensions) == '[') {
numDimensions++;
}
return numDimensions;
}
/**
* Returns the size of values of this type. This method must not be used for method types.
*
* @return the size of values of this type, i.e., 2 for {@code long} and {@code double}, 0 for
* {@code void} and 1 otherwise.
*/
public int getSize() {
switch (sort) {
case VOID:
return 0;
case BOOLEAN:
case CHAR:
case BYTE:
case SHORT:
case INT:
case FLOAT:
case ARRAY:
case OBJECT:
case INTERNAL:
return 1;
case LONG:
case DOUBLE:
return 2;
default:
throw new AssertionError();
}
}
/**
* Returns the size of the arguments and of the return value of methods of this type. This method
* should only be used for method types.
*
* @return the size of the arguments of the method (plus one for the implicit this argument),
* argumentsSize, and the size of its return value, returnSize, packed into a single int i =
* {@code (argumentsSize << 2) | returnSize} (argumentsSize is therefore equal to {@code
* i >> 2}, and returnSize to {@code i & 0x03}).
*/
public int getArgumentsAndReturnSizes() {
return getArgumentsAndReturnSizes(getDescriptor());
}
/**
* Returns a JVM instruction opcode adapted to this {@link Type}. This method must not be used for
* method types.
*
* @param opcode a JVM instruction opcode. This opcode must be one of ILOAD, ISTORE, IALOAD,
* IASTORE, IADD, ISUB, IMUL, IDIV, IREM, INEG, ISHL, ISHR, IUSHR, IAND, IOR, IXOR and
* IRETURN.
* @return an opcode that is similar to the given opcode, but adapted to this {@link Type}. For
* example, if this type is {@code float} and {@code opcode} is IRETURN, this method returns
* FRETURN.
*/
public int getOpcode(final int opcode) {
if (opcode == Opcodes.IALOAD || opcode == Opcodes.IASTORE) {
switch (sort) {
case BOOLEAN:
case BYTE:
return opcode + (Opcodes.BALOAD - Opcodes.IALOAD);
case CHAR:
return opcode + (Opcodes.CALOAD - Opcodes.IALOAD);
case SHORT:
return opcode + (Opcodes.SALOAD - Opcodes.IALOAD);
case INT:
return opcode;
case FLOAT:
return opcode + (Opcodes.FALOAD - Opcodes.IALOAD);
case LONG:
return opcode + (Opcodes.LALOAD - Opcodes.IALOAD);
case DOUBLE:
return opcode + (Opcodes.DALOAD - Opcodes.IALOAD);
case ARRAY:
case OBJECT:
case INTERNAL:
return opcode + (Opcodes.AALOAD - Opcodes.IALOAD);
case METHOD:
case VOID:
throw new UnsupportedOperationException();
default:
throw new AssertionError();
}
} else {
switch (sort) {
case VOID:
if (opcode != Opcodes.IRETURN) {
throw new UnsupportedOperationException();
}
return Opcodes.RETURN;
case BOOLEAN:
case BYTE:
case CHAR:
case SHORT:
case INT:
return opcode;
case FLOAT:
return opcode + (Opcodes.FRETURN - Opcodes.IRETURN);
case LONG:
return opcode + (Opcodes.LRETURN - Opcodes.IRETURN);
case DOUBLE:
return opcode + (Opcodes.DRETURN - Opcodes.IRETURN);
case ARRAY:
case OBJECT:
case INTERNAL:
if (opcode != Opcodes.ILOAD && opcode != Opcodes.ISTORE && opcode != Opcodes.IRETURN) {
throw new UnsupportedOperationException();
}
return opcode + (Opcodes.ARETURN - Opcodes.IRETURN);
case METHOD:
throw new UnsupportedOperationException();
default:
throw new AssertionError();
}
}
}
// -----------------------------------------------------------------------------------------------
// Equals, hashCode and toString.
// -----------------------------------------------------------------------------------------------
/**
* Tests if the given object is equal to this type.
*
* @param object the object to be compared to this type.
* @return {@literal true} if the given object is equal to this type.
*/
@Override
public boolean equals(final Object object) {
if (this == object) {
return true;
}
if (!(object instanceof Type)) {
return false;
}
Type other = (Type) object;
if ((sort == INTERNAL ? OBJECT : sort) != (other.sort == INTERNAL ? OBJECT : other.sort)) {
return false;
}
int begin = valueBegin;
int end = valueEnd;
int otherBegin = other.valueBegin;
int otherEnd = other.valueEnd;
// Compare the values.
if (end - begin != otherEnd - otherBegin) {
return false;
}
for (int i = begin, j = otherBegin; i < end; i++, j++) {
if (valueBuffer.charAt(i) != other.valueBuffer.charAt(j)) {
return false;
}
}
return true;
}
/**
* Returns a hash code value for this type.
*
* @return a hash code value for this type.
*/
@Override
public int hashCode() {
int hashCode = 13 * (sort == INTERNAL ? OBJECT : sort);
if (sort >= ARRAY) {
for (int i = valueBegin, end = valueEnd; i < end; i++) {
hashCode = 17 * (hashCode + valueBuffer.charAt(i));
}
}
return hashCode;
}
/**
* Returns a string representation of this type.
*
* @return the descriptor of this type.
*/
@Override
public String toString() {
return getDescriptor();
}
}
}
public static class ClassReader implements Closeable {
/**
* 字节码数组
*/
private byte[] codes;
/**
* 当前读取数组的下标
*/
private int index;
/**
* 文件大小
*/
private int length;
/**
* 标记下标,用于回滚
*/
private int markIndex;
public ClassReader(String path, String fileName) throws IOException {
this(new FileInputStream(new File(path + File.separator + fileName)));
}
public ClassReader(Class clazz) throws IOException {
this(clazz.getResourceAsStream(getClassFileName(clazz)));
}
public ClassReader(InputStream in) throws IOException {
try {
byte[] buffer = new byte[in.available()];
ByteArrayOutputStream out = new ByteArrayOutputStream();
while (in.read(buffer) != -1) {
out.write(buffer);
}
this.codes = out.toByteArray();
this.length = this.codes.length;
} finally {
in.close();
}
}
public ClassReader(byte[] codes) {
this.codes = codes;
this.length = codes.length;
}
public void mark() {
this.markIndex = index;
}
public void reset() {
this.index = this.markIndex;
}
public int getIndex() {
return index;
}
public void setIndex(int index) {
this.index = index;
}
/**
* 读取8位-无符号
*
* @return 8位-无符号
*/
public short readUint8() {
return (short) (readInt8() & 0x0FF);
}
/**
* 读取8位-有符号
*
* @return 8位-有符号
*/
public byte readInt8() {
byte value = codes[index];
index = index + 1;
return value;
}
/**
* 读取16位-无符号
*
* @return 16位-无符号
*/
public int readUint16() {
return readInt16() & 0x0FFFF;
}
/**
* 读取16位-有符号
*
* @return 16位-有符号
*/
public int readInt16() {
int value = (short) (codes[index] << 8 | codes[index + 1] & 0xFF);
index = index + 2;
return value;
}
public int readUint32() {
return readInt32() & 0x0FFFF;
}
/**
* 读取32位-有符号
*
* @return 32位-有符号
*/
public int readInt32() {
int value = (codes[index] & 0xff) << 24 |
(codes[index + 1] & 0xff) << 16 |
(codes[index + 2] & 0xff) << 8 |
codes[index + 3] & 0xff;
index = index + 4;
return value;
}
/**
* 读取64位-无符号
*
* @return 64位-无符号
*/
public long readUint64() {
long value = ((long) codes[index] & 0xff) << 56 |
((long) codes[index + 1] & 0xff) << 48 |
((long) codes[index + 2] & 0xff) << 40 |
((long) codes[index + 3] & 0xff) << 32 |
((long) codes[index + 4] & 0xff) << 24 |
((long) codes[index + 5] & 0xff) << 16 |
((long) codes[index + 6] & 0xff) << 8 |
(long) codes[index + 7] & 0xff;
index = index + 8;
return value;
}
/**
* 读取16位-无符号-数组
*
* @return 16位-无符号-数组
*/
public int[] readUint16s() {
int length = readUint16();
int[] values = new int[length];
for (int i = 0; i < length; i++) {
values[i] = readUint16();
}
return values;
}
/**
* 读取8位-有符号-数组
*
* @param length 长度
* @return 8位-有符号-数组
*/
public byte[] readInt8s(int length) {
byte[] values = new byte[length];
for (int i = 0; i < length; i++) {
values[i] = readInt8();
}
return values;
}
/**
* 读取8位-无符号-数组
*
* @param length 长度
* @return 8位-无符号-数组
*/
public short[] readUInt8s(int length) {
short[] values = new short[length];
for (int i = 0; i < length; i++) {
values[i] = readUint8();
}
return values;
}
public byte[] getBytes() {
return codes;
}
public InputStream getInputStream() {
return new ByteArrayInputStream(codes);
}
@Override
public void close() {
this.codes = null;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"file\":\"" + length + "b, " + (length / 1024) + "kb\"")
.add("\"readIndex\":" + index)
.toString();
}
}
public static class Opcodes {
// Possible values for the type operand of the NEWARRAY instruction.
// See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-6.html#jvms-6.5.newarray.
public static final int T_BOOLEAN = 4;
public static final int T_CHAR = 5;
public static final int T_FLOAT = 6;
public static final int T_DOUBLE = 7;
public static final int T_BYTE = 8;
public static final int T_SHORT = 9;
public static final int T_INT = 10;
public static final int T_LONG = 11;
// Possible values for the reference_kind field of CONSTANT_MethodHandle_info structures.
// See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.4.8.
public static final int H_GETFIELD = 1;
public static final int H_GETSTATIC = 2;
public static final int H_PUTFIELD = 3;
public static final int H_PUTSTATIC = 4;
public static final int H_INVOKEVIRTUAL = 5;
public static final int H_INVOKESTATIC = 6;
public static final int H_INVOKESPECIAL = 7;
public static final int H_NEWINVOKESPECIAL = 8;
public static final int H_INVOKEINTERFACE = 9;
/**
* Table 5.4.3.5-A. Bytecode Behaviors for Method Handles
*/
public static final String[] METHOD_HANDLES_NAMES = {
null, "REF_getField", "REF_getStatic", "REF_putField",
"REF_putStatic", "REF_invokeVirtual", "REF_invokeStatic",
"REF_invokeSpecial", "REF_newInvokeSpecial", "REF_invokeInterface"
};
/**
* An expanded frame.
*
* A flag to expand the stack map frames. By default stack map frames are visited in their
* original format (i.e. "expanded" for classes whose version is less than V1_6, and "compressed"
* for the other classes). If this flag is set, stack map frames are always visited in expanded
* format (this option adds a decompression/compression step in ClassReader and ClassWriter which
* degrades performance quite a lot).
*/
public static final int F_NEW = -1;
/**
* A compressed frame with complete frame data.
*/
public static final int F_FULL = 0;
/**
* A compressed frame where locals are the same as the locals in the previous frame, except that
* additional 1-3 locals are defined, and with an empty stack.
*/
public static final int F_APPEND = 1;
/**
* A compressed frame where locals are the same as the locals in the previous frame, except that
* the last 1-3 locals are absent and with an empty stack.
*/
public static final int F_CHOP = 2;
/**
* A compressed frame with exactly the same locals as the previous frame and with an empty stack.
*/
public static final int F_SAME = 3;
/**
* A compressed frame with exactly the same locals as the previous frame and with a single value
* on the stack.
*/
public static final int F_SAME1 = 4;
// Standard stack map frame element types, .
public static final byte ITEM_TOP = 0;
public static final byte ITEM_INTEGER = 1;
public static final byte ITEM_FLOAT = 2;
public static final byte ITEM_DOUBLE = 3;
public static final byte ITEM_LONG = 4;
public static final byte ITEM_NULL = 5;
public static final byte ITEM_UNINITIALIZED_THIS = 6;
public static final byte ITEM_OBJECT = 7;
public static final byte ITEM_UNINITIALIZED = 8;
// The JVM opcode values (with the MethodVisitor method name used to visit them in comment, and
// where '-' means 'same method name as on the previous line').
// See https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-6.html.
/**
* Java VM opcodes.
*/
public static final short NOP = 0;
public static final short ACONST_NULL = 1;
public static final short ICONST_M1 = 2;
public static final short ICONST_0 = 3;
public static final short ICONST_1 = 4;
public static final short ICONST_2 = 5;
public static final short ICONST_3 = 6;
public static final short ICONST_4 = 7;
public static final short ICONST_5 = 8;
public static final short LCONST_0 = 9;
public static final short LCONST_1 = 10;
public static final short FCONST_0 = 11;
public static final short FCONST_1 = 12;
public static final short FCONST_2 = 13;
public static final short DCONST_0 = 14;
public static final short DCONST_1 = 15;
public static final short BIPUSH = 16;
public static final short SIPUSH = 17;
public static final short LDC = 18;
public static final short LDC_W = 19;
public static final short LDC2_W = 20;
public static final short ILOAD = 21;
public static final short LLOAD = 22;
public static final short FLOAD = 23;
public static final short DLOAD = 24;
public static final short ALOAD = 25;
public static final short ILOAD_0 = 26;
public static final short ILOAD_1 = 27;
public static final short ILOAD_2 = 28;
public static final short ILOAD_3 = 29;
public static final short LLOAD_0 = 30;
public static final short LLOAD_1 = 31;
public static final short LLOAD_2 = 32;
public static final short LLOAD_3 = 33;
public static final short FLOAD_0 = 34;
public static final short FLOAD_1 = 35;
public static final short FLOAD_2 = 36;
public static final short FLOAD_3 = 37;
public static final short DLOAD_0 = 38;
public static final short DLOAD_1 = 39;
public static final short DLOAD_2 = 40;
public static final short DLOAD_3 = 41;
public static final short ALOAD_0 = 42;
public static final short ALOAD_1 = 43;
public static final short ALOAD_2 = 44;
public static final short ALOAD_3 = 45;
public static final short IALOAD = 46;
public static final short LALOAD = 47;
public static final short FALOAD = 48;
public static final short DALOAD = 49;
public static final short AALOAD = 50;
public static final short BALOAD = 51;
public static final short CALOAD = 52;
public static final short SALOAD = 53;
public static final short ISTORE = 54;
public static final short LSTORE = 55;
public static final short FSTORE = 56;
public static final short DSTORE = 57;
public static final short ASTORE = 58;
public static final short ISTORE_0 = 59;
public static final short ISTORE_1 = 60;
public static final short ISTORE_2 = 61;
public static final short ISTORE_3 = 62;
public static final short LSTORE_0 = 63;
public static final short LSTORE_1 = 64;
public static final short LSTORE_2 = 65;
public static final short LSTORE_3 = 66;
public static final short FSTORE_0 = 67;
public static final short FSTORE_1 = 68;
public static final short FSTORE_2 = 69;
public static final short FSTORE_3 = 70;
public static final short DSTORE_0 = 71;
public static final short DSTORE_1 = 72;
public static final short DSTORE_2 = 73;
public static final short DSTORE_3 = 74;
public static final short ASTORE_0 = 75;
public static final short ASTORE_1 = 76;
public static final short ASTORE_2 = 77;
public static final short ASTORE_3 = 78;
public static final short IASTORE = 79;
public static final short LASTORE = 80;
public static final short FASTORE = 81;
public static final short DASTORE = 82;
public static final short AASTORE = 83;
public static final short BASTORE = 84;
public static final short CASTORE = 85;
public static final short SASTORE = 86;
public static final short POP = 87;
public static final short POP2 = 88;
public static final short DUP = 89;
public static final short DUP_X1 = 90;
public static final short DUP_X2 = 91;
public static final short DUP2 = 92;
public static final short DUP2_X1 = 93;
public static final short DUP2_X2 = 94;
public static final short SWAP = 95;
public static final short IADD = 96;
public static final short LADD = 97;
public static final short FADD = 98;
public static final short DADD = 99;
public static final short ISUB = 100;
public static final short LSUB = 101;
public static final short FSUB = 102;
public static final short DSUB = 103;
public static final short IMUL = 104;
public static final short LMUL = 105;
public static final short FMUL = 106;
public static final short DMUL = 107;
public static final short IDIV = 108;
public static final short LDIV = 109;
public static final short FDIV = 110;
public static final short DDIV = 111;
public static final short IREM = 112;
public static final short LREM = 113;
public static final short FREM = 114;
public static final short DREM = 115;
public static final short INEG = 116;
public static final short LNEG = 117;
public static final short FNEG = 118;
public static final short DNEG = 119;
public static final short ISHL = 120;
public static final short LSHL = 121;
public static final short ISHR = 122;
public static final short LSHR = 123;
public static final short IUSHR = 124;
public static final short LUSHR = 125;
public static final short IAND = 126;
public static final short LAND = 127;
public static final short IOR = 128;
public static final short LOR = 129;
public static final short IXOR = 130;
public static final short LXOR = 131;
public static final short IINC = 132;
public static final short I2L = 133;
public static final short I2F = 134;
public static final short I2D = 135;
public static final short L2I = 136;
public static final short L2F = 137;
public static final short L2D = 138;
public static final short F2I = 139;
public static final short F2L = 140;
public static final short F2D = 141;
public static final short D2I = 142;
public static final short D2L = 143;
public static final short D2F = 144;
public static final short I2B = 145;
public static final short INT2BYTE = 145; // Old notion
public static final short I2C = 146;
public static final short INT2CHAR = 146; // Old notion
public static final short I2S = 147;
public static final short INT2SHORT = 147; // Old notion
public static final short LCMP = 148;
public static final short FCMPL = 149;
public static final short FCMPG = 150;
public static final short DCMPL = 151;
public static final short DCMPG = 152;
public static final short IFEQ = 153;
public static final short IFNE = 154;
public static final short IFLT = 155;
public static final short IFGE = 156;
public static final short IFGT = 157;
public static final short IFLE = 158;
public static final short IF_ICMPEQ = 159;
public static final short IF_ICMPNE = 160;
public static final short IF_ICMPLT = 161;
public static final short IF_ICMPGE = 162;
public static final short IF_ICMPGT = 163;
public static final short IF_ICMPLE = 164;
public static final short IF_ACMPEQ = 165;
public static final short IF_ACMPNE = 166;
public static final short GOTO = 167;
public static final short JSR = 168;
public static final short RET = 169;
public static final short TABLESWITCH = 170;
public static final short LOOKUPSWITCH = 171;
public static final short IRETURN = 172;
public static final short LRETURN = 173;
public static final short FRETURN = 174;
public static final short DRETURN = 175;
public static final short ARETURN = 176;
public static final short RETURN = 177;
public static final short GETSTATIC = 178;
public static final short PUTSTATIC = 179;
public static final short GETFIELD = 180;
public static final short PUTFIELD = 181;
public static final short INVOKEVIRTUAL = 182;
public static final short INVOKESPECIAL = 183;
public static final short INVOKENONVIRTUAL = 183; // Old name in JDK 1.0
public static final short INVOKESTATIC = 184;
public static final short INVOKEINTERFACE = 185;
public static final short NEW = 187;
public static final short NEWARRAY = 188;
public static final short ANEWARRAY = 189;
public static final short ARRAYLENGTH = 190;
public static final short ATHROW = 191;
public static final short CHECKCAST = 192;
public static final short INSTANCEOF = 193;
public static final short MONITORENTER = 194;
public static final short MONITOREXIT = 195;
public static final short WIDE = 196;
public static final short MULTIANEWARRAY = 197;
public static final short IFNULL = 198;
public static final short IFNONNULL = 199;
public static final short GOTO_W = 200;
public static final short JSR_W = 201;
/**
* Non-legal opcodes, may be used by JVM internally.
*/
public static final short BREAKPOINT = 202;
public static final short LDC_QUICK = 203;
public static final short LDC_W_QUICK = 204;
public static final short LDC2_W_QUICK = 205;
public static final short GETFIELD_QUICK = 206;
public static final short PUTFIELD_QUICK = 207;
public static final short GETFIELD2_QUICK = 208;
public static final short PUTFIELD2_QUICK = 209;
public static final short GETSTATIC_QUICK = 210;
public static final short PUTSTATIC_QUICK = 211;
public static final short GETSTATIC2_QUICK = 212;
public static final short PUTSTATIC2_QUICK = 213;
public static final short INVOKEVIRTUAL_QUICK = 214;
public static final short INVOKENONVIRTUAL_QUICK = 215;
public static final short INVOKESUPER_QUICK = 216;
public static final short INVOKESTATIC_QUICK = 217;
public static final short INVOKEINTERFACE_QUICK = 218;
public static final short INVOKEVIRTUALOBJECT_QUICK = 219;
public static final short NEW_QUICK = 221;
public static final short ANEWARRAY_QUICK = 222;
public static final short MULTIANEWARRAY_QUICK = 223;
public static final short CHECKCAST_QUICK = 224;
public static final short INSTANCEOF_QUICK = 225;
public static final short INVOKEVIRTUAL_QUICK_W = 226;
public static final short GETFIELD_QUICK_W = 227;
public static final short PUTFIELD_QUICK_W = 228;
public static final short IMPDEP1 = 254;
public static final short IMPDEP2 = 255;
public static final String ILLEGAL_OPCODE = "";
public static final String ILLEGAL_TYPE = "";
/**
* Names of opcodes.
*/
public static final String[] OPCODE_NAMES = {
"nop", "aconst_null", "iconst_m1", "iconst_0", "iconst_1",
"iconst_2", "iconst_3", "iconst_4", "iconst_5", "lconst_0",
"lconst_1", "fconst_0", "fconst_1", "fconst_2", "dconst_0",
"dconst_1", "bipush", "sipush", "ldc", "ldc_w", "ldc2_w", "iload",
"lload", "fload", "dload", "aload", "iload_0", "iload_1", "iload_2",
"iload_3", "lload_0", "lload_1", "lload_2", "lload_3", "fload_0",
"fload_1", "fload_2", "fload_3", "dload_0", "dload_1", "dload_2",
"dload_3", "aload_0", "aload_1", "aload_2", "aload_3", "iaload",
"laload", "faload", "daload", "aaload", "baload", "caload", "saload",
"istore", "lstore", "fstore", "dstore", "astore", "istore_0",
"istore_1", "istore_2", "istore_3", "lstore_0", "lstore_1",
"lstore_2", "lstore_3", "fstore_0", "fstore_1", "fstore_2",
"fstore_3", "dstore_0", "dstore_1", "dstore_2", "dstore_3",
"astore_0", "astore_1", "astore_2", "astore_3", "iastore", "lastore",
"fastore", "dastore", "aastore", "bastore", "castore", "sastore",
"pop", "pop2", "dup", "dup_x1", "dup_x2", "dup2", "dup2_x1",
"dup2_x2", "swap", "iadd", "ladd", "fadd", "dadd", "isub", "lsub",
"fsub", "dsub", "imul", "lmul", "fmul", "dmul", "idiv", "ldiv",
"fdiv", "ddiv", "irem", "lrem", "frem", "drem", "ineg", "lneg",
"fneg", "dneg", "ishl", "lshl", "ishr", "lshr", "iushr", "lushr",
"iand", "land", "ior", "lor", "ixor", "lxor", "iinc", "i2l", "i2f",
"i2d", "l2i", "l2f", "l2d", "f2i", "f2l", "f2d", "d2i", "d2l", "d2f",
"i2b", "i2c", "i2s", "lcmp", "fcmpl", "fcmpg",
"dcmpl", "dcmpg", "ifeq", "ifne", "iflt", "ifge", "ifgt", "ifle",
"if_icmpeq", "if_icmpne", "if_icmplt", "if_icmpge", "if_icmpgt",
"if_icmple", "if_acmpeq", "if_acmpne", "goto", "jsr", "ret",
"tableswitch", "lookupswitch", "ireturn", "lreturn", "freturn",
"dreturn", "areturn", "return", "getstatic", "putstatic", "getfield",
"putfield", "invokevirtual", "invokespecial", "invokestatic",
"invokeinterface", ILLEGAL_OPCODE, "new", "newarray", "anewarray",
"arraylength", "athrow", "checkcast", "instanceof", "monitorenter",
"monitorexit", "wide", "multianewarray", "ifnull", "ifnonnull",
"goto_w", "jsr_w", "breakpoint", ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE, ILLEGAL_OPCODE,
ILLEGAL_OPCODE, "impdep1", "impdep2"
};
private short[] opcodes;
public Opcodes(short[] opcodes) {
this.opcodes = opcodes;
}
public short[] getOpcodes() {
return opcodes;
}
public String getOpcodeName(int pc) {
return OPCODE_NAMES[opcodes[pc]];
}
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(",", "[", "]");
for (int i = 0; i < opcodes.length; i++) {
int opcode = opcodes[i];
String name = OPCODE_NAMES[opcode];
joiner.add("{\"index\":" + i + ",\"opcode\":" + opcode + ",\"name\":\"" + name + "\"}");
}
return joiner.toString();
}
}
public class Attribute extends LinkedHashMap {
public Attribute(int attrNameIndex, int length, Attribute parent, ClassReader reader) {
String attrName = constantPool.getUtf8(attrNameIndex);
put("attrNameIndex", attrNameIndex);
put("attrName", attrName);
put("length", length);
try {
reader.mark();
decode(attrName, length, parent, reader);
} catch (Exception e) {
put("decodeAttributeException", e.toString());
reader.reset();
byte[] decodeAttributeExceptionBytes = reader.readInt8s(length);
put("decodeAttributeExceptionBytes", decodeAttributeExceptionBytes);
}
}
public Opcodes getOpcodes() {
return (Opcodes) get("opcodes");
}
private void decode(String attrName, int length, Attribute parent, ClassReader reader) {
switch (attrName) {
case "ConstantValue": {
int constantValueIndex = reader.readUint16();
put("constantValueIndex", constantValueIndex);
put("constantValue", constantPool.getConstantInfo(constantValueIndex));
break;
}
case "SourceFile": {
int sourceFileIndex = reader.readUint16();
put("sourceFileIndex", sourceFileIndex);
put("sourceFileName", constantPool.getUtf8(sourceFileIndex));
break;
}
case "Code": {
put("maxStack", reader.readUint16());
put("maxLocals", reader.readUint16());
int codeLength = reader.readInt32();
short[] opcodes = reader.readUInt8s(codeLength);
put("opcodes", new Opcodes(opcodes));
int codeExceptionsLength = reader.readUint16();
CodeException[] codeExceptions;
if (codeExceptionsLength == 0) {
codeExceptions = EMPTY_CODE_EXCEPTIONS;
} else {
codeExceptions = new CodeException[codeExceptionsLength];
for (int i = 0; i < codeExceptions.length; i++) {
codeExceptions[i] = new CodeException(reader.readUint16(), reader.readUint16(), reader.readUint16(), reader.readUint16());
}
}
put("exceptionTable", codeExceptions);
put("attributes", readAttributes(reader, this));
break;
}
case "Exceptions": {
int exceptionIndexTableLength = reader.readUint16();
int[] exceptionIndexTable;
String[] exceptionNameTable;
if (exceptionIndexTableLength == 0) {
exceptionIndexTable = EMPTY_EXCEPTION_INDEX_TABLE;
exceptionNameTable = EMPTY_STRING;
} else {
exceptionIndexTable = new int[exceptionIndexTableLength];
for (int i = 0; i < exceptionIndexTable.length; i++) {
exceptionIndexTable[i] = reader.readUint16();
}
exceptionNameTable = new String[exceptionIndexTable.length];
for (int i = 0; i < exceptionIndexTable.length; i++) {
exceptionNameTable[i] = constantPool.getClassNameForToString(exceptionIndexTable[i]);
}
}
put("exceptionIndexTable", exceptionIndexTable);
put("exceptionNameTable", exceptionNameTable);
break;
}
case "LineNumberTable": {
int lineNumberTableLength = reader.readUint16();
LineNumber[] lineNumberTable;
if (lineNumberTableLength == 0) {
lineNumberTable = EMPTY_LINE_NUMBER_TABLE;
} else {
Opcodes opcodes = parent.getOpcodes();
lineNumberTable = new LineNumber[lineNumberTableLength];
for (int i = 0; i < lineNumberTable.length; i++) {
lineNumberTable[i] = new LineNumber(reader.readUint16(), reader.readUint16(), opcodes);
}
}
put("lineNumberTable", lineNumberTable);
break;
}
case "LocalVariableTable":
case "LocalVariableTypeTable": {
int localVariableTableLength = reader.readUint16();
LocalVariable[] localVariableTable;
if (localVariableTableLength == 0) {
localVariableTable = EMPTY_LOCAL_VARIABLE_TABLE;
} else {
localVariableTable = new LocalVariable[localVariableTableLength];
}
for (int i = 0; i < localVariableTable.length; i++) {
localVariableTable[i] = new LocalVariable(
reader.readUint16(), reader.readUint16(),
reader.readUint16(), reader.readUint16(), reader.readUint16());
}
put("localVariableTable", localVariableTable);
break;
}
case "InnerClasses": {
int numberOfClassesLength = reader.readUint16();
InnerClass[] numberOfClasses;
if (numberOfClassesLength == 0) {
numberOfClasses = EMPTY_INNER_CLASSES;
} else {
numberOfClasses = new InnerClass[numberOfClassesLength];
}
for (int i = 0; i < numberOfClasses.length; i++) {
numberOfClasses[i] = new InnerClass(
reader.readUint16(), reader.readUint16(),
reader.readUint16(), reader.readUint16());
}
put("numberOfClasses", numberOfClasses);
break;
}
case "Synthetic": {
if (length > 0) {
byte[] syntheticBytes = reader.readInt8s(length);
put("bytes", syntheticBytes);
System.err.println("Synthetic attribute with length > 0");
}
break;
}
case "Deprecated": {
if (length > 0) {
byte[] deprecatedBytes = reader.readInt8s(length);
put("bytes", deprecatedBytes);
System.err.println("Deprecated attribute with length > 0");
}
break;
}
case "PMGClass": {
put("pmgClassIndex", reader.readUint16());
put("pmgIndex", reader.readUint16());
break;
}
case "Signature": {
int signatureIndex = reader.readUint16();
ConstantPool.ConstantUtf8Info info = (ConstantPool.ConstantUtf8Info) constantPool.getConstantInfo(signatureIndex);
String signature = info.value();
StringBuilder typeBuilder = new StringBuilder();
StringBuilder genericBuilder = new StringBuilder();
// 复杂的暂时没实现. Ljava/util/Map;>;
// Ljava/util/List;
int count = 0;
boolean generic = false;
for (int i = 0; i < signature.length(); i++) {
char c = signature.charAt(i);
if (c == '<') {
generic = true;
} else if (c == '>') {
generic = false;
} else if (c == ';') {
count++;
genericBuilder.append(';');
} else if (generic) {
genericBuilder.append(c);
} else {
typeBuilder.append(c);
}
}
put("signatureIndex", signatureIndex);
put("signature", info);
if (count == 1) {
put("signatureType", typeBuilder.toString());
put("signatureGeneric", genericBuilder.toString());
}
break;
}
case "StackMap": {
int stackMapsLength = reader.readUint16();
StackMapEntry[] stackMaps;
if (stackMapsLength == 0) {
stackMaps = EMPTY_STACK_MAP_ENTRY;
} else {
stackMaps = new StackMapEntry[stackMapsLength];
for (int i = 0; i < stackMaps.length; i++) {
int byteCodeOffset = reader.readInt16();
int typesOfLocalsSize = reader.readUint16();
StackMapEntry stackMapEntry = new StackMapEntry(byteCodeOffset, typesOfLocalsSize);
for (int j = 0; j < stackMapEntry.typesOfLocals.length; j++) {
stackMapEntry.typesOfLocals[j] = new StackMapType(reader);
}
stackMaps[i] = stackMapEntry;
}
}
put("map", stackMaps);
break;
}
case "StackMapTable": {
int numberOfEntries = reader.readUint16();
StackMapFrame[] entries;
if (numberOfEntries == 0) {
entries = EMPTY_STACK_MAP_FRAME;
} else {
entries = new StackMapFrame[numberOfEntries];
for (int i = 0; i < numberOfEntries; i++) {
entries[i] = new StackMapFrame(reader);
}
}
put("entries", entries);
break;
}
case "RuntimeVisibleAnnotations": {
int numberOfAnnotations = reader.readUint16();
Annotation[] annotations = new Annotation[numberOfAnnotations];
for (int i = 0; i < numberOfAnnotations; i++) {
annotations[i] = new Annotation(reader, i);
}
put("annotations", annotations);
break;
}
case "BootstrapMethods": {
int numberOfBootstrapMethods = reader.readUint16();
BootstrapMethod[] bootstrapMethods;
if (numberOfBootstrapMethods == 0) {
bootstrapMethods = EMPTY_BOOT_STRAP_METHOD;
} else {
bootstrapMethods = new BootstrapMethod[numberOfBootstrapMethods];
}
put("bootstrapMethods", bootstrapMethods);
for (int i = 0; i < bootstrapMethods.length; i++) {
bootstrapMethods[i] = new BootstrapMethod(reader);
}
break;
}
case "MethodParameters": {
int parametersCount = reader.readUint8();
MethodParameter[] methodParameters;
if (parametersCount == 0) {
methodParameters = EMPTY_METHOD_PARAMETER;
} else {
methodParameters = new MethodParameter[parametersCount];
}
put("methodParameters", methodParameters);
for (int i = 0; i < methodParameters.length; i++) {
methodParameters[i] = new MethodParameter(reader, i);
}
break;
}
default: {
byte[] unkownBytes = reader.readInt8s(length);
put("unkownBytes", unkownBytes);
break;
}
}
}
public int length() {
return (int) get("length");
}
public String attrName() {
return (String) get("attrName");
}
public boolean isAttrLocalVariableTable() {
return "LocalVariableTable".equals(attrName());
}
public boolean isAttrLocalVariableTypeTable() {
return "LocalVariableTypeTable".equals(attrName());
}
public boolean isAttrCode() {
return "Code".equals(attrName());
}
public boolean isMethodParameters() {
return "MethodParameters".equals(attrName());
}
public boolean isRuntimeVisibleAnnotations() {
return "RuntimeVisibleAnnotations".equals(attrName());
}
public boolean isStackMapTable() {
return "StackMapTable".equals(attrName());
}
public boolean isLineNumberTable() {
return "LineNumberTable".equals(attrName());
}
public boolean isSignature() {
return "Signature".equals(attrName());
}
public LocalVariable[] localVariableTable() {
Object localVariableTable = get("localVariableTable");
if (localVariableTable instanceof LocalVariable[]) {
return (LocalVariable[]) localVariableTable;
}
return null;
}
public MethodParameter[] methodParameters() {
Object methodParameters = get("methodParameters");
if (methodParameters instanceof MethodParameter[]) {
return (MethodParameter[]) methodParameters;
}
return null;
}
public Attribute[] attributes() {
Object attributes = get("attributes");
if (attributes instanceof Attribute[]) {
return (Attribute[]) attributes;
}
return null;
}
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(",", "{", "}");
Iterator> i = entrySet().iterator();
while (i.hasNext()) {
Map.Entry e = i.next();
String key = e.getKey();
Object value = e.getValue();
if (value instanceof Number) {
joiner.add("\"" + key + "\":" + value);
} else if (value == null) {
joiner.add("\"" + key + "\":null");
} else if (value.getClass().isArray()) {
joiner.add("\"" + key + "\":" + toJsonArray(value));
} else if (value instanceof CharSequence) {
joiner.add("\"" + key + "\":\"" + value + "\"");
} else {
joiner.add("\"" + key + "\":" + value);
}
}
return joiner.toString();
}
public class CodeException {
private int startPc;
private int endPc;
private int handlerPc;
private int catchType;
public CodeException(int startPc, int endPc, int handlerPc, int catchType) {
this.startPc = startPc;
this.endPc = endPc;
this.handlerPc = handlerPc;
this.catchType = catchType;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"startPc\":" + startPc)
.add("\"endPc\":" + endPc)
.add("\"handlerPc\":" + handlerPc)
.add("\"catchType\":" + catchType)
.toString();
}
}
public class LineNumber {
private int startPc; // Program Counter (PC) corresponds to line
private int lineNumber; // number in source file
private Opcodes opcodes;
public LineNumber(int startPc, int lineNumber, Opcodes opcodes) {
this.startPc = startPc;
this.lineNumber = lineNumber;
this.opcodes = opcodes;
}
public Opcodes getOpcodes() {
return opcodes;
}
public int getLineNumber() {
return lineNumber;
}
public int getStartPc() {
return startPc;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"startPcName\":\"" + opcodes.getOpcodeName(startPc) + "\"")
.add("\"startPc\":" + startPc)
.add("\"lineNumber\":" + lineNumber)
.toString();
}
}
public class LocalVariable {
private int startPc; // Range in which the variable is valid
private int length;
private int nameIndex; // Index in constant pool of variable name
private int signatureIndex; // Index of variable signature
private int index; // Variable is `index'th local variable on this method's frame.
public LocalVariable(int startPc, int length, int nameIndex, int signatureIndex, int index) {
this.startPc = startPc;
this.length = length;
this.nameIndex = nameIndex;
this.signatureIndex = signatureIndex;
this.index = index;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"name\":\"" + constantPool.getUtf8ForToString(nameIndex) + "\"")
.add("\"signatureName\":\"" + constantPool.getUtf8ForToString(signatureIndex) + "\"")
.add("\"startPc\":" + startPc)
.add("\"length\":" + length)
.add("\"nameIndex\":" + nameIndex)
.add("\"signatureIndex\":" + signatureIndex)
.toString();
}
public int startPc() {
return startPc;
}
public int nameIndex() {
return nameIndex;
}
public int signatureIndex() {
return signatureIndex;
}
public int index() {
return index;
}
public int length() {
return length;
}
public String name() {
return constantPool.getUtf8(nameIndex);
}
public String signatureName() {
return constantPool.getUtf8(signatureIndex);
}
}
public class InnerClass {
private int innerClassIndex;
private int outerClassIndex;
private int innerNameIndex;
private int innerAccessFlags;
public InnerClass(int innerClassIndex, int outerClassIndex, int innerNameIndex, int innerAccessFlags) {
this.innerClassIndex = innerClassIndex;
this.outerClassIndex = outerClassIndex;
this.innerNameIndex = innerNameIndex;
this.innerAccessFlags = innerAccessFlags;
}
public String innerName() {
if (innerNameIndex == 0) {
return null;
} else {
return constantPool.getUtf8(innerNameIndex);
}
}
public String innerClassName() {
return constantPool.getClassName(innerClassIndex);
}
public String outerClassName() {
if (outerClassIndex == 0) {
return null;
} else {
return constantPool.getClassName(outerClassIndex);
}
}
@Override
public String toString() {
String innerName = constantPool.getUtf8ForToString(innerNameIndex);
String toStringInnerName = innerName == null ? "null" : "\"" + innerName + "\"";
String outerClassName = constantPool.getClassNameForToString(outerClassIndex);
String toStringOuterClassName = outerClassName == null ? "null" : "\"" + outerClassName + "\"";
return new StringJoiner(",", "{", "}")
.add("\"innerAccessFlags\":\"" + Modifier.toString(innerAccessFlags) + "\"")
.add("\"innerName\":" + toStringInnerName)
.add("\"innerClassName\":\"" + innerClassName() + "\"")
.add("\"outerClassName\":" + toStringOuterClassName)
.add("\"innerNameIndex\":" + innerNameIndex)
.add("\"innerClassIndex\":" + innerClassIndex)
.add("\"outerClassIndex\":" + outerClassIndex)
.toString();
}
}
public class StackMapEntry {
private int byteCodeOffset;
private StackMapType[] typesOfLocals;
public StackMapEntry(int byteCodeOffset, int typesOfLocalsSize) {
this.byteCodeOffset = byteCodeOffset;
if (typesOfLocalsSize == 0) {
this.typesOfLocals = EMPTY_STACK_MAP_TYPE;
} else {
this.typesOfLocals = new StackMapType[typesOfLocalsSize];
}
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"byteCodeOffset\":" + byteCodeOffset)
.add("\"typesOfLocals\":\"" + toJsonArray(typesOfLocals))
.toString();
}
}
public class StackMapType {
private byte type;
private int objectVariableIndex = -1;
private int offset = -1;
public StackMapType(ClassReader reader) {
type = reader.readInt8();
if (type == Opcodes.ITEM_OBJECT) {
objectVariableIndex = reader.readInt16();
} else if (type == Opcodes.ITEM_UNINITIALIZED) {
offset = reader.readInt16();
}
}
public String getTypeName() {
switch (type) {
case Opcodes.ITEM_TOP: {
return "top";
}
case Opcodes.ITEM_INTEGER: {
return "integer";
}
case Opcodes.ITEM_FLOAT: {
return "float";
}
case Opcodes.ITEM_DOUBLE: {
return "double";
}
case Opcodes.ITEM_LONG: {
return "long";
}
case Opcodes.ITEM_NULL: {
return "null";
}
case Opcodes.ITEM_UNINITIALIZED_THIS: {
return "uninitializedThis";
}
case Opcodes.ITEM_OBJECT: {
return "object";
}
case Opcodes.ITEM_UNINITIALIZED: {
return "uninitialized";
}
default: {
return "unkown";
}
}
}
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(",", "{", "}")
.add("\"type\":" + type)
.add("\"typeName\":\"" + getTypeName() + "\"");
if (type == Opcodes.ITEM_OBJECT) {
joiner.add("\"objectVariableIndex\":" + objectVariableIndex);
joiner.add("\"objectVariable\":\"" + constantPool.getClassNameForToString(objectVariableIndex) + "\"");
}
if (type == Opcodes.ITEM_UNINITIALIZED) {
joiner.add("\"offset\":" + offset);
}
return joiner.toString();
}
}
public class StackMapFrame {
private short frameType;
private String frameTypeName;
private Integer offsetDelta;
private StackMapType[] stacks;
private StackMapType[] locals;
public StackMapFrame(ClassReader reader) {
frameType = reader.readUint8();
if (frameType >= 0 && frameType <= 63) {
frameTypeName = "same";
} else if (frameType >= 64 && frameType <= 127) {
frameTypeName = "same_locals_1_stack_item_frame";
stacks = new StackMapType[]{new StackMapType(reader)};
} else if (frameType == 247) {
frameTypeName = "same_locals_1_stack_item_frame_extended";
offsetDelta = reader.readUint16();
stacks = new StackMapType[]{new StackMapType(reader)};
} else if (frameType >= 248 && frameType <= 250) {
frameTypeName = "chop_frame";
offsetDelta = reader.readUint16();
} else if (frameType == 251) {
frameTypeName = "same_frame_extended";
offsetDelta = reader.readUint16();
} else if (frameType >= 252 && frameType <= 254) {
frameTypeName = "append_frame";
offsetDelta = reader.readUint16();
locals = new StackMapType[frameType - 251];
for (int i = 0; i < locals.length; i++) {
locals[i] = new StackMapType(reader);
}
} else if (frameType == 255) {
frameTypeName = "full_frame";
offsetDelta = reader.readUint16();
locals = new StackMapType[reader.readUint16()];
for (int i = 0; i < locals.length; i++) {
locals[i] = new StackMapType(reader);
}
stacks = new StackMapType[reader.readUint16()];
for (int i = 0; i < stacks.length; i++) {
stacks[i] = new StackMapType(reader);
}
}
}
public short getFrameType() {
return frameType;
}
public String getFrameTypeName() {
return frameTypeName;
}
public Integer getOffsetDelta() {
return offsetDelta;
}
public StackMapType[] getStacks() {
return stacks;
}
public StackMapType[] getLocals() {
return locals;
}
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(",", "{", "}")
.add("\"frameType\":" + frameType)
.add("\"frameTypeName\":\"" + frameTypeName + "\"");
if (offsetDelta != null) {
joiner.add("\"offsetDelta\":" + offsetDelta);
}
if (stacks != null) {
joiner.add("\"stacks\":" + toJsonArray(stacks));
}
if (locals != null) {
joiner.add("\"locals\":" + toJsonArray(locals));
}
return joiner.toString();
}
}
public class MethodParameter {
public static final int FINAL = 0x00000010;
public static final int SYNTHETIC = 0x00001000;
public static final int MANDATED = 0x00008000;
/**
* 项目的值name_index必须为零或constant_pool 表中的有效索引。
* 如果该项的值name_index为零，则该parameters元素表示没有名称的形式参数。
* 如果项目的值name_index不为零，则constant_pool该索引处的 条目必须是一个 CONSTANT_Utf8_info结构
*/
private int nameIndex;
/**
* 0x0010 ( ACC_FINAL)
* 表示已声明形式参数 final。
*
* 0x1000 ( ACC_SYNTHETIC)
* 表示根据编写源代码的语言规范（JLS §13.1），形参未在源代码中显式或隐式声明。（形参是生成此class文件的编译器的实现工件 。）
*
* 0x8000 ( ACC_MANDATED)
* 表示根据编写源代码的语言规范（JLS §13.1），在源代码中隐式声明了形参。
*/
private int accessFlags;
private int index;
public MethodParameter(ClassReader reader, int index) {
this.index = index;
this.nameIndex = reader.readUint16();
this.accessFlags = reader.readUint16();
}
public String getName() {
String realName = getRealName();
if (realName == null || realName.isEmpty()) {
return "arg" + index;
} else {
return realName;
}
}
public String getRealName() {
return constantPool.getUtf8ForToString(nameIndex);
}
public int getAccessFlags() {
return accessFlags;
}
public int getIndex() {
return index;
}
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"name\":\"" + constantPool.getUtf8ForToString(nameIndex) + "\"")
.add("\"nameIndex\":" + nameIndex)
.add("\"accessFlags\":" + accessFlags)
.add("\"accFinal\":" + ((accessFlags & FINAL) != 0))
.add("\"accSynthetic\":" + ((accessFlags & SYNTHETIC) != 0))
.add("\"accMandated\":" + ((accessFlags & MANDATED) != 0));
return joiner.toString();
}
}
public class BootstrapMethod {
private int bootstrapMethodRef;
private int[] bootstrapArguments;
public BootstrapMethod(ClassReader reader) {
this.bootstrapMethodRef = reader.readUint16();
this.bootstrapArguments = new int[reader.readUint16()];
for (int i = 0; i < bootstrapArguments.length; i++) {
this.bootstrapArguments[i] = reader.readUint16();
}
}
@Override
public String toString() {
ConstantPool.ConstantInfo[] infos = new ConstantPool.ConstantInfo[bootstrapArguments.length];
for (int i = 0; i < bootstrapArguments.length; i++) {
int bootstrapArgument = bootstrapArguments[i];
infos[i] = constantPool.getConstantInfo(bootstrapArgument);
}
StringJoiner joiner = new StringJoiner(",", "{", "}")
.add("\"bootstrapMethod\":" + constantPool.getConstantMethodHandleInfo(bootstrapMethodRef))
.add("\"bootstrapArguments\":" + Arrays.toString(infos));
return joiner.toString();
}
}
public class Annotation {
private int index;
private int typeIndex;
private ElementValue[] elementValues;
public Annotation(ClassReader reader, int index) {
this.index = index;
this.typeIndex = reader.readUint16();
this.elementValues = new ElementValue[reader.readUint16()];
for (int i = 0; i < elementValues.length; i++) {
int valueIndex = reader.readUint16();
char tag = (char) reader.readInt8();
this.elementValues[i] = newElementValue(tag, reader, i);
this.elementValues[i].valueIndex = valueIndex;
}
}
public ElementValue newElementValue(char tag, ClassReader reader, int index) {
ElementValue newElementValue;
switch (tag) {
case 'e': {
EnumElementValue elementValue = new EnumElementValue();
elementValue.typeNameIndex = reader.readUint16();
elementValue.constNameIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case '@': {
AnnotationElementValue elementValue = new AnnotationElementValue();
elementValue.annotationValue = new Annotation(reader, index);
newElementValue = elementValue;
break;
}
case 'c': {
ClassElementValue elementValue = new ClassElementValue();
elementValue.classInfoIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case '[': {
ArrayElementValue elementValue = new ArrayElementValue();
ElementValue[] elementValues = new ElementValue[reader.readUint16()];
for (int i = 0; i < elementValues.length; i++) {
char elementTag = (char) reader.readInt8();
elementValues[i] = newElementValue(elementTag, reader, i);
}
elementValue.arrayValue = elementValues;
newElementValue = elementValue;
break;
}
case 'B': {
ByteElementValue elementValue = new ByteElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 'C': {
CharElementValue elementValue = new CharElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 'D': {
DoubleElementValue elementValue = new DoubleElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 'F': {
FloatElementValue elementValue = new FloatElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 'I': {
IntElementValue elementValue = new IntElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 'J': {
LongElementValue elementValue = new LongElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 'S': {
ShortElementValue elementValue = new ShortElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 'Z': {
BooleanElementValue elementValue = new BooleanElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
case 's': {
StringElementValue elementValue = new StringElementValue();
elementValue.constValueIndex = reader.readUint16();
newElementValue = elementValue;
break;
}
default: {
throw new IllegalStateException("a unkown annotation tag. tag = '" + tag + "'");
}
}
newElementValue.tag = tag;
return newElementValue;
}
@Override
public String toString() {
return new StringJoiner(",", "{", "}")
.add("\"index\":" + index)
.add("\"typeIndex\":" + typeIndex)
.add("\"type\":\"" + constantPool.getUtf8ForToString(typeIndex) + "\"")
.add("\"elementValues\":" + toJsonArray(elementValues))
.toString();
}
public class ElementValue {
protected int valueIndex;
protected char tag;
@Override
public String toString() {
StringJoiner joiner = new StringJoiner(",", "{", "}")
.add("\"tag\":\"" + tag + "\"")
.add("\"type\":\"" + getClass().getSimpleName() + "\"");
if (valueIndex != 0) {
joiner.add("\"valueIndex\":" + valueIndex);
joiner.add("\"value\":\"" + constantPool.getUtf8ForToString(valueIndex) + "\"");
}
toStringAppend(joiner);
return joiner.toString();
}
public void toStringAppend(StringJoiner joiner) {
}
}
public class ClassElementValue extends ElementValue {
private int classInfoIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"classInfoIndex\":" + classInfoIndex)
.add("\"classInfo\":\"" + constantPool.getUtf8ForToString(classInfoIndex) + "\"");
}
}
public class StringElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":\"" + constantPool.getUtf8ForToString(constValueIndex) + "\"");
}
}
public class ByteElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getInteger(constValueIndex));
}
}
public class CharElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getInteger(constValueIndex));
}
}
public class DoubleElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getDouble(constValueIndex));
}
}
public class FloatElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getFloat(constValueIndex));
}
}
public class IntElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getInteger(constValueIndex));
}
}
public class LongElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getLong(constValueIndex));
}
}
public class ShortElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getInteger(constValueIndex));
}
}
public class BooleanElementValue extends ElementValue {
private int constValueIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constValueIndex\":" + constValueIndex)
.add("\"constValue\":" + constantPool.getInteger(constValueIndex));
}
}
public class ArrayElementValue extends ElementValue {
private ElementValue[] arrayValue;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"arrayValue\":" + toJsonArray(arrayValue))
.add("\"length\":" + arrayValue.length);
}
}
public class AnnotationElementValue extends ElementValue {
private Annotation annotationValue;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"annotationValue\":" + annotationValue);
}
}
public class EnumElementValue extends ElementValue {
private int constNameIndex;
private int typeNameIndex;
@Override
public void toStringAppend(StringJoiner joiner) {
joiner.add("\"constNameIndex\":" + constNameIndex)
.add("\"constName\":\"" + constantPool.getUtf8ForToString(constNameIndex) + "\"")
.add("\"typeNameIndex\":" + typeNameIndex)
.add("\"typeName\":\"" + constantPool.getUtf8ForToString(typeNameIndex) + "\"");
}
}
}
}
}