proguard.classfile.io.ProgramClassReader Maven / Gradle / Ivy
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ProGuard is a free Java class file shrinker, optimizer, and obfuscator. It removes unused classes, fields, methods, and attributes. It then optimizes the bytecode. It then renames the remaining classes, fields, and methods using short meaningless names. Finally, it preverifies the processed code for Java 6 or for Java Micro Edition.
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/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2009 Eric Lafortune ([email protected])
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.io;
import proguard.classfile.*;
import proguard.classfile.attribute.*;
import proguard.classfile.attribute.annotation.*;
import proguard.classfile.attribute.annotation.visitor.*;
import proguard.classfile.attribute.preverification.*;
import proguard.classfile.attribute.preverification.visitor.*;
import proguard.classfile.attribute.visitor.*;
import proguard.classfile.constant.*;
import proguard.classfile.constant.visitor.ConstantVisitor;
import proguard.classfile.util.*;
import proguard.classfile.visitor.*;
import java.io.DataInput;
/**
* This ClassVisitor fills out the ProgramClass objects that it visits with data
* from the given DataInput object.
*
* @author Eric Lafortune
*/
public class ProgramClassReader
extends SimplifiedVisitor
implements ClassVisitor,
MemberVisitor,
ConstantVisitor,
AttributeVisitor,
InnerClassesInfoVisitor,
ExceptionInfoVisitor,
StackMapFrameVisitor,
VerificationTypeVisitor,
LineNumberInfoVisitor,
LocalVariableInfoVisitor,
LocalVariableTypeInfoVisitor,
AnnotationVisitor,
ElementValueVisitor
{
private final RuntimeDataInput dataInput;
/**
* Creates a new ProgramClassReader for reading from the given DataInput.
*/
public ProgramClassReader(DataInput dataInput)
{
this.dataInput = new RuntimeDataInput(dataInput);
}
// Implementations for ClassVisitor.
public void visitProgramClass(ProgramClass programClass)
{
// Read and check the magic number.
programClass.u4magic = dataInput.readInt();
ClassUtil.checkMagicNumber(programClass.u4magic);
// Read and check the version numbers.
int u2minorVersion = dataInput.readUnsignedShort();
int u2majorVersion = dataInput.readUnsignedShort();
programClass.u4version = ClassUtil.internalClassVersion(u2majorVersion,
u2minorVersion);
ClassUtil.checkVersionNumbers(programClass.u4version);
// Read the constant pool. Note that the first entry is not used.
programClass.u2constantPoolCount = dataInput.readUnsignedShort();
programClass.constantPool = new Constant[programClass.u2constantPoolCount];
for (int index = 1; index < programClass.u2constantPoolCount; index++)
{
Constant constant = createConstant();
constant.accept(programClass, this);
programClass.constantPool[index] = constant;
// Long constants and double constants take up two entries in the
// constant pool.
int tag = constant.getTag();
if (tag == ClassConstants.CONSTANT_Long ||
tag == ClassConstants.CONSTANT_Double)
{
programClass.constantPool[++index] = null;
}
}
// Read the general class information.
programClass.u2accessFlags = dataInput.readUnsignedShort();
programClass.u2thisClass = dataInput.readUnsignedShort();
programClass.u2superClass = dataInput.readUnsignedShort();
// Read the interfaces.
programClass.u2interfacesCount = dataInput.readUnsignedShort();
programClass.u2interfaces = new int[programClass.u2interfacesCount];
for (int index = 0; index < programClass.u2interfacesCount; index++)
{
programClass.u2interfaces[index] = dataInput.readUnsignedShort();
}
// Read the fields.
programClass.u2fieldsCount = dataInput.readUnsignedShort();
programClass.fields = new ProgramField[programClass.u2fieldsCount];
for (int index = 0; index < programClass.u2fieldsCount; index++)
{
ProgramField programField = new ProgramField();
this.visitProgramField(programClass, programField);
programClass.fields[index] = programField;
}
// Read the methods.
programClass.u2methodsCount = dataInput.readUnsignedShort();
programClass.methods = new ProgramMethod[programClass.u2methodsCount];
for (int index = 0; index < programClass.u2methodsCount; index++)
{
ProgramMethod programMethod = new ProgramMethod();
this.visitProgramMethod(programClass, programMethod);
programClass.methods[index] = programMethod;
}
// Read the class attributes.
programClass.u2attributesCount = dataInput.readUnsignedShort();
programClass.attributes = new Attribute[programClass.u2attributesCount];
for (int index = 0; index < programClass.u2attributesCount; index++)
{
Attribute attribute = createAttribute(programClass);
attribute.accept(programClass, this);
programClass.attributes[index] = attribute;
}
}
public void visitLibraryClass(LibraryClass libraryClass)
{
}
// Implementations for MemberVisitor.
public void visitProgramField(ProgramClass programClass, ProgramField programField)
{
// Read the general field information.
programField.u2accessFlags = dataInput.readUnsignedShort();
programField.u2nameIndex = dataInput.readUnsignedShort();
programField.u2descriptorIndex = dataInput.readUnsignedShort();
// Read the field attributes.
programField.u2attributesCount = dataInput.readUnsignedShort();
programField.attributes = new Attribute[programField.u2attributesCount];
for (int index = 0; index < programField.u2attributesCount; index++)
{
Attribute attribute = createAttribute(programClass);
attribute.accept(programClass, programField, this);
programField.attributes[index] = attribute;
}
}
public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
{
// Read the general method information.
programMethod.u2accessFlags = dataInput.readUnsignedShort();
programMethod.u2nameIndex = dataInput.readUnsignedShort();
programMethod.u2descriptorIndex = dataInput.readUnsignedShort();
// Read the method attributes.
programMethod.u2attributesCount = dataInput.readUnsignedShort();
programMethod.attributes = new Attribute[programMethod.u2attributesCount];
for (int index = 0; index < programMethod.u2attributesCount; index++)
{
Attribute attribute = createAttribute(programClass);
attribute.accept(programClass, programMethod, this);
programMethod.attributes[index] = attribute;
}
}
public void visitLibraryMember(LibraryClass libraryClass, LibraryMember libraryMember)
{
}
// Implementations for ConstantVisitor.
public void visitIntegerConstant(Clazz clazz, IntegerConstant integerConstant)
{
integerConstant.u4value = dataInput.readInt();
}
public void visitLongConstant(Clazz clazz, LongConstant longConstant)
{
longConstant.u8value = dataInput.readLong();
}
public void visitFloatConstant(Clazz clazz, FloatConstant floatConstant)
{
floatConstant.f4value = dataInput.readFloat();
}
public void visitDoubleConstant(Clazz clazz, DoubleConstant doubleConstant)
{
doubleConstant.f8value = dataInput.readDouble();
}
public void visitStringConstant(Clazz clazz, StringConstant stringConstant)
{
stringConstant.u2stringIndex = dataInput.readUnsignedShort();
}
public void visitUtf8Constant(Clazz clazz, Utf8Constant utf8Constant)
{
int u2length = dataInput.readUnsignedShort();
// Read the UTF-8 bytes.
byte[] bytes = new byte[u2length];
dataInput.readFully(bytes);
utf8Constant.setBytes(bytes);
}
public void visitAnyRefConstant(Clazz clazz, RefConstant refConstant)
{
refConstant.u2classIndex = dataInput.readUnsignedShort();
refConstant.u2nameAndTypeIndex = dataInput.readUnsignedShort();
}
public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
{
classConstant.u2nameIndex = dataInput.readUnsignedShort();
}
public void visitNameAndTypeConstant(Clazz clazz, NameAndTypeConstant nameAndTypeConstant)
{
nameAndTypeConstant.u2nameIndex = dataInput.readUnsignedShort();
nameAndTypeConstant.u2descriptorIndex = dataInput.readUnsignedShort();
}
// Implementations for AttributeVisitor.
public void visitUnknownAttribute(Clazz clazz, UnknownAttribute unknownAttribute)
{
// Read the unknown information.
byte[] info = new byte[unknownAttribute.u4attributeLength];
dataInput.readFully(info);
unknownAttribute.info = info;
}
public void visitSourceFileAttribute(Clazz clazz, SourceFileAttribute sourceFileAttribute)
{
sourceFileAttribute.u2sourceFileIndex = dataInput.readUnsignedShort();
}
public void visitSourceDirAttribute(Clazz clazz, SourceDirAttribute sourceDirAttribute)
{
sourceDirAttribute.u2sourceDirIndex = dataInput.readUnsignedShort();
}
public void visitInnerClassesAttribute(Clazz clazz, InnerClassesAttribute innerClassesAttribute)
{
// Read the inner classes.
innerClassesAttribute.u2classesCount = dataInput.readUnsignedShort();
innerClassesAttribute.classes = new InnerClassesInfo[innerClassesAttribute.u2classesCount];
for (int index = 0; index < innerClassesAttribute.u2classesCount; index++)
{
InnerClassesInfo innerClassesInfo = new InnerClassesInfo();
this.visitInnerClassesInfo(clazz, innerClassesInfo);
innerClassesAttribute.classes[index] = innerClassesInfo;
}
}
public void visitEnclosingMethodAttribute(Clazz clazz, EnclosingMethodAttribute enclosingMethodAttribute)
{
enclosingMethodAttribute.u2classIndex = dataInput.readUnsignedShort();
enclosingMethodAttribute.u2nameAndTypeIndex = dataInput.readUnsignedShort();
}
public void visitDeprecatedAttribute(Clazz clazz, DeprecatedAttribute deprecatedAttribute)
{
// This attribute does not contain any additional information.
}
public void visitSyntheticAttribute(Clazz clazz, SyntheticAttribute syntheticAttribute)
{
// This attribute does not contain any additional information.
}
public void visitSignatureAttribute(Clazz clazz, SignatureAttribute signatureAttribute)
{
signatureAttribute.u2signatureIndex = dataInput.readUnsignedShort();
}
public void visitConstantValueAttribute(Clazz clazz, Field field, ConstantValueAttribute constantValueAttribute)
{
constantValueAttribute.u2constantValueIndex = dataInput.readUnsignedShort();
}
public void visitExceptionsAttribute(Clazz clazz, Method method, ExceptionsAttribute exceptionsAttribute)
{
// Read the exceptions.
exceptionsAttribute.u2exceptionIndexTableLength = dataInput.readUnsignedShort();
exceptionsAttribute.u2exceptionIndexTable = new int[exceptionsAttribute.u2exceptionIndexTableLength];
for (int index = 0; index < exceptionsAttribute.u2exceptionIndexTableLength; index++)
{
exceptionsAttribute.u2exceptionIndexTable[index] = dataInput.readUnsignedShort();
}
}
public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
{
// Read the stack size and local variable frame size.
codeAttribute.u2maxStack = dataInput.readUnsignedShort();
codeAttribute.u2maxLocals = dataInput.readUnsignedShort();
// Read the byte code.
codeAttribute.u4codeLength = dataInput.readInt();
byte[] code = new byte[codeAttribute.u4codeLength];
dataInput.readFully(code);
codeAttribute.code = code;
// Read the exceptions.
codeAttribute.u2exceptionTableLength = dataInput.readUnsignedShort();
codeAttribute.exceptionTable = new ExceptionInfo[codeAttribute.u2exceptionTableLength];
for (int index = 0; index < codeAttribute.u2exceptionTableLength; index++)
{
ExceptionInfo exceptionInfo = new ExceptionInfo();
this.visitExceptionInfo(clazz, method, codeAttribute, exceptionInfo);
codeAttribute.exceptionTable[index] = exceptionInfo;
}
// Read the code attributes.
codeAttribute.u2attributesCount = dataInput.readUnsignedShort();
codeAttribute.attributes = new Attribute[codeAttribute.u2attributesCount];
for (int index = 0; index < codeAttribute.u2attributesCount; index++)
{
Attribute attribute = createAttribute(clazz);
attribute.accept(clazz, method, codeAttribute, this);
codeAttribute.attributes[index] = attribute;
}
}
public void visitStackMapAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapAttribute stackMapAttribute)
{
// Read the stack map frames (only full frames, without tag).
stackMapAttribute.u2stackMapFramesCount = dataInput.readUnsignedShort();
stackMapAttribute.stackMapFrames = new FullFrame[stackMapAttribute.u2stackMapFramesCount];
for (int index = 0; index < stackMapAttribute.u2stackMapFramesCount; index++)
{
FullFrame stackMapFrame = new FullFrame();
this.visitFullFrame(clazz, method, codeAttribute, index, stackMapFrame);
stackMapAttribute.stackMapFrames[index] = stackMapFrame;
}
}
public void visitStackMapTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, StackMapTableAttribute stackMapTableAttribute)
{
// Read the stack map frames.
stackMapTableAttribute.u2stackMapFramesCount = dataInput.readUnsignedShort();
stackMapTableAttribute.stackMapFrames = new StackMapFrame[stackMapTableAttribute.u2stackMapFramesCount];
for (int index = 0; index < stackMapTableAttribute.u2stackMapFramesCount; index++)
{
StackMapFrame stackMapFrame = createStackMapFrame();
stackMapFrame.accept(clazz, method, codeAttribute, 0, this);
stackMapTableAttribute.stackMapFrames[index] = stackMapFrame;
}
}
public void visitLineNumberTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberTableAttribute lineNumberTableAttribute)
{
// Read the line numbers.
lineNumberTableAttribute.u2lineNumberTableLength = dataInput.readUnsignedShort();
lineNumberTableAttribute.lineNumberTable = new LineNumberInfo[lineNumberTableAttribute.u2lineNumberTableLength];
for (int index = 0; index < lineNumberTableAttribute.u2lineNumberTableLength; index++)
{
LineNumberInfo lineNumberInfo = new LineNumberInfo();
this.visitLineNumberInfo(clazz, method, codeAttribute, lineNumberInfo);
lineNumberTableAttribute.lineNumberTable[index] = lineNumberInfo;
}
}
public void visitLocalVariableTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTableAttribute localVariableTableAttribute)
{
// Read the local variables.
localVariableTableAttribute.u2localVariableTableLength = dataInput.readUnsignedShort();
localVariableTableAttribute.localVariableTable = new LocalVariableInfo[localVariableTableAttribute.u2localVariableTableLength];
for (int index = 0; index < localVariableTableAttribute.u2localVariableTableLength; index++)
{
LocalVariableInfo localVariableInfo = new LocalVariableInfo();
this.visitLocalVariableInfo(clazz, method, codeAttribute, localVariableInfo);
localVariableTableAttribute.localVariableTable[index] = localVariableInfo;
}
}
public void visitLocalVariableTypeTableAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeTableAttribute localVariableTypeTableAttribute)
{
// Read the local variable types.
localVariableTypeTableAttribute.u2localVariableTypeTableLength = dataInput.readUnsignedShort();
localVariableTypeTableAttribute.localVariableTypeTable = new LocalVariableTypeInfo[localVariableTypeTableAttribute.u2localVariableTypeTableLength];
for (int index = 0; index < localVariableTypeTableAttribute.u2localVariableTypeTableLength; index++)
{
LocalVariableTypeInfo localVariableTypeInfo = new LocalVariableTypeInfo();
this.visitLocalVariableTypeInfo(clazz, method, codeAttribute, localVariableTypeInfo);
localVariableTypeTableAttribute.localVariableTypeTable[index] = localVariableTypeInfo;
}
}
public void visitAnyAnnotationsAttribute(Clazz clazz, AnnotationsAttribute annotationsAttribute)
{
// Read the annotations.
annotationsAttribute.u2annotationsCount = dataInput.readUnsignedShort();
annotationsAttribute.annotations = new Annotation[annotationsAttribute.u2annotationsCount];
for (int index = 0; index < annotationsAttribute.u2annotationsCount; index++)
{
Annotation annotation = new Annotation();
this.visitAnnotation(clazz, annotation);
annotationsAttribute.annotations[index] = annotation;
}
}
public void visitAnyParameterAnnotationsAttribute(Clazz clazz, Method method, ParameterAnnotationsAttribute parameterAnnotationsAttribute)
{
// Read the parameter annotations.
parameterAnnotationsAttribute.u2parametersCount = dataInput.readUnsignedByte();
// The java compilers of JDK 1.5, JDK 1.6, and Eclipse all count the
// number of parameters of constructors of non-static inner classes
// incorrectly. Fix it right here.
int parameterStart = 0;
if (method.getName(clazz).equals(ClassConstants.INTERNAL_METHOD_NAME_INIT))
{
int realParametersCount = ClassUtil.internalMethodParameterCount(method.getDescriptor(clazz));
parameterStart = realParametersCount - parameterAnnotationsAttribute.u2parametersCount;
parameterAnnotationsAttribute.u2parametersCount = realParametersCount;
}
parameterAnnotationsAttribute.u2parameterAnnotationsCount = new int[parameterAnnotationsAttribute.u2parametersCount];
parameterAnnotationsAttribute.parameterAnnotations = new Annotation[parameterAnnotationsAttribute.u2parametersCount][];
for (int parameterIndex = parameterStart; parameterIndex < parameterAnnotationsAttribute.u2parametersCount; parameterIndex++)
{
// Read the parameter annotations of the given parameter.
int u2annotationsCount = dataInput.readUnsignedShort();
Annotation[] annotations = new Annotation[u2annotationsCount];
for (int index = 0; index < u2annotationsCount; index++)
{
Annotation annotation = new Annotation();
this.visitAnnotation(clazz, annotation);
annotations[index] = annotation;
}
parameterAnnotationsAttribute.u2parameterAnnotationsCount[parameterIndex] = u2annotationsCount;
parameterAnnotationsAttribute.parameterAnnotations[parameterIndex] = annotations;
}
}
public void visitAnnotationDefaultAttribute(Clazz clazz, Method method, AnnotationDefaultAttribute annotationDefaultAttribute)
{
// Read the default element value.
ElementValue elementValue = createElementValue();
elementValue.accept(clazz, null, this);
annotationDefaultAttribute.defaultValue = elementValue;
}
// Implementations for InnerClassesInfoVisitor.
public void visitInnerClassesInfo(Clazz clazz, InnerClassesInfo innerClassesInfo)
{
innerClassesInfo.u2innerClassIndex = dataInput.readUnsignedShort();
innerClassesInfo.u2outerClassIndex = dataInput.readUnsignedShort();
innerClassesInfo.u2innerNameIndex = dataInput.readUnsignedShort();
innerClassesInfo.u2innerClassAccessFlags = dataInput.readUnsignedShort();
}
// Implementations for ExceptionInfoVisitor.
public void visitExceptionInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, ExceptionInfo exceptionInfo)
{
exceptionInfo.u2startPC = dataInput.readUnsignedShort();
exceptionInfo.u2endPC = dataInput.readUnsignedShort();
exceptionInfo.u2handlerPC = dataInput.readUnsignedShort();
exceptionInfo.u2catchType = dataInput.readUnsignedShort();
}
// Implementations for StackMapFrameVisitor.
public void visitSameZeroFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SameZeroFrame sameZeroFrame)
{
if (sameZeroFrame.getTag() == StackMapFrame.SAME_ZERO_FRAME_EXTENDED)
{
sameZeroFrame.u2offsetDelta = dataInput.readUnsignedShort();
}
}
public void visitSameOneFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, SameOneFrame sameOneFrame)
{
if (sameOneFrame.getTag() == StackMapFrame.SAME_ONE_FRAME_EXTENDED)
{
sameOneFrame.u2offsetDelta = dataInput.readUnsignedShort();
}
// Read the verification type of the stack entry.
VerificationType verificationType = createVerificationType();
verificationType.accept(clazz, method, codeAttribute, offset, this);
sameOneFrame.stackItem = verificationType;
}
public void visitLessZeroFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, LessZeroFrame lessZeroFrame)
{
lessZeroFrame.u2offsetDelta = dataInput.readUnsignedShort();
}
public void visitMoreZeroFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, MoreZeroFrame moreZeroFrame)
{
moreZeroFrame.u2offsetDelta = dataInput.readUnsignedShort();
// Read the verification types of the additional local variables.
moreZeroFrame.additionalVariables = new VerificationType[moreZeroFrame.additionalVariablesCount];
for (int index = 0; index < moreZeroFrame.additionalVariablesCount; index++)
{
VerificationType verificationType = createVerificationType();
verificationType.accept(clazz, method, codeAttribute, offset, this);
moreZeroFrame.additionalVariables[index] = verificationType;
}
}
public void visitFullFrame(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, FullFrame fullFrame)
{
fullFrame.u2offsetDelta = dataInput.readUnsignedShort();
// Read the verification types of the local variables.
fullFrame.variablesCount = dataInput.readUnsignedShort();
fullFrame.variables = new VerificationType[fullFrame.variablesCount];
for (int index = 0; index < fullFrame.variablesCount; index++)
{
VerificationType verificationType = createVerificationType();
verificationType.variablesAccept(clazz, method, codeAttribute, offset, index, this);
fullFrame.variables[index] = verificationType;
}
// Read the verification types of the stack entries.
fullFrame.stackCount = dataInput.readUnsignedShort();
fullFrame.stack = new VerificationType[fullFrame.stackCount];
for (int index = 0; index < fullFrame.stackCount; index++)
{
VerificationType verificationType = createVerificationType();
verificationType.stackAccept(clazz, method, codeAttribute, offset, index, this);
fullFrame.stack[index] = verificationType;
}
}
// Implementations for VerificationTypeVisitor.
public void visitAnyVerificationType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, VerificationType verificationType)
{
// Most verification types don't contain any additional information.
}
public void visitObjectType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, ObjectType objectType)
{
objectType.u2classIndex = dataInput.readUnsignedShort();
}
public void visitUninitializedType(Clazz clazz, Method method, CodeAttribute codeAttribute, int offset, UninitializedType uninitializedType)
{
uninitializedType.u2newInstructionOffset = dataInput.readUnsignedShort();
}
// Implementations for LineNumberInfoVisitor.
public void visitLineNumberInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LineNumberInfo lineNumberInfo)
{
lineNumberInfo.u2startPC = dataInput.readUnsignedShort();
lineNumberInfo.u2lineNumber = dataInput.readUnsignedShort();
}
// Implementations for LocalVariableInfoVisitor.
public void visitLocalVariableInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableInfo localVariableInfo)
{
localVariableInfo.u2startPC = dataInput.readUnsignedShort();
localVariableInfo.u2length = dataInput.readUnsignedShort();
localVariableInfo.u2nameIndex = dataInput.readUnsignedShort();
localVariableInfo.u2descriptorIndex = dataInput.readUnsignedShort();
localVariableInfo.u2index = dataInput.readUnsignedShort();
}
// Implementations for LocalVariableTypeInfoVisitor.
public void visitLocalVariableTypeInfo(Clazz clazz, Method method, CodeAttribute codeAttribute, LocalVariableTypeInfo localVariableTypeInfo)
{
localVariableTypeInfo.u2startPC = dataInput.readUnsignedShort();
localVariableTypeInfo.u2length = dataInput.readUnsignedShort();
localVariableTypeInfo.u2nameIndex = dataInput.readUnsignedShort();
localVariableTypeInfo.u2signatureIndex = dataInput.readUnsignedShort();
localVariableTypeInfo.u2index = dataInput.readUnsignedShort();
}
// Implementations for AnnotationVisitor.
public void visitAnnotation(Clazz clazz, Annotation annotation)
{
// Read the annotation type.
annotation.u2typeIndex = dataInput.readUnsignedShort();
// Read the element value pairs.
annotation.u2elementValuesCount = dataInput.readUnsignedShort();
annotation.elementValues = new ElementValue[annotation.u2elementValuesCount];
for (int index = 0; index < annotation.u2elementValuesCount; index++)
{
int u2elementNameIndex = dataInput.readUnsignedShort();
ElementValue elementValue = createElementValue();
elementValue.u2elementNameIndex = u2elementNameIndex;
elementValue.accept(clazz, annotation, this);
annotation.elementValues[index] = elementValue;
}
}
// Implementations for ElementValueVisitor.
public void visitConstantElementValue(Clazz clazz, Annotation annotation, ConstantElementValue constantElementValue)
{
constantElementValue.u2constantValueIndex = dataInput.readUnsignedShort();
}
public void visitEnumConstantElementValue(Clazz clazz, Annotation annotation, EnumConstantElementValue enumConstantElementValue)
{
enumConstantElementValue.u2typeNameIndex = dataInput.readUnsignedShort();
enumConstantElementValue.u2constantNameIndex = dataInput.readUnsignedShort();
}
public void visitClassElementValue(Clazz clazz, Annotation annotation, ClassElementValue classElementValue)
{
classElementValue.u2classInfoIndex = dataInput.readUnsignedShort();
}
public void visitAnnotationElementValue(Clazz clazz, Annotation annotation, AnnotationElementValue annotationElementValue)
{
// Read the annotation.
Annotation annotationValue = new Annotation();
this.visitAnnotation(clazz, annotationValue);
annotationElementValue.annotationValue = annotationValue;
}
public void visitArrayElementValue(Clazz clazz, Annotation annotation, ArrayElementValue arrayElementValue)
{
// Read the element values.
arrayElementValue.u2elementValuesCount = dataInput.readUnsignedShort();
arrayElementValue.elementValues = new ElementValue[arrayElementValue.u2elementValuesCount];
for (int index = 0; index < arrayElementValue.u2elementValuesCount; index++)
{
ElementValue elementValue = createElementValue();
elementValue.accept(clazz, annotation, this);
arrayElementValue.elementValues[index] = elementValue;
}
}
// Small utility methods.
private Constant createConstant()
{
int u1tag = dataInput.readUnsignedByte();
switch (u1tag)
{
case ClassConstants.CONSTANT_Utf8: return new Utf8Constant();
case ClassConstants.CONSTANT_Integer: return new IntegerConstant();
case ClassConstants.CONSTANT_Float: return new FloatConstant();
case ClassConstants.CONSTANT_Long: return new LongConstant();
case ClassConstants.CONSTANT_Double: return new DoubleConstant();
case ClassConstants.CONSTANT_String: return new StringConstant();
case ClassConstants.CONSTANT_Fieldref: return new FieldrefConstant();
case ClassConstants.CONSTANT_Methodref: return new MethodrefConstant();
case ClassConstants.CONSTANT_InterfaceMethodref: return new InterfaceMethodrefConstant();
case ClassConstants.CONSTANT_Class: return new ClassConstant();
case ClassConstants.CONSTANT_NameAndType: return new NameAndTypeConstant();
default: throw new RuntimeException("Unknown constant type ["+u1tag+"] in constant pool");
}
}
private Attribute createAttribute(Clazz clazz)
{
int u2attributeNameIndex = dataInput.readUnsignedShort();
int u4attributeLength = dataInput.readInt();
String attributeName = clazz.getString(u2attributeNameIndex);
Attribute attribute =
attributeName.equals(ClassConstants.ATTR_SourceFile) ? (Attribute)new SourceFileAttribute():
attributeName.equals(ClassConstants.ATTR_SourceDir) ? (Attribute)new SourceDirAttribute():
attributeName.equals(ClassConstants.ATTR_InnerClasses) ? (Attribute)new InnerClassesAttribute():
attributeName.equals(ClassConstants.ATTR_EnclosingMethod) ? (Attribute)new EnclosingMethodAttribute():
attributeName.equals(ClassConstants.ATTR_Deprecated) ? (Attribute)new DeprecatedAttribute():
attributeName.equals(ClassConstants.ATTR_Synthetic) ? (Attribute)new SyntheticAttribute():
attributeName.equals(ClassConstants.ATTR_Signature) ? (Attribute)new SignatureAttribute():
attributeName.equals(ClassConstants.ATTR_ConstantValue) ? (Attribute)new ConstantValueAttribute():
attributeName.equals(ClassConstants.ATTR_Exceptions) ? (Attribute)new ExceptionsAttribute():
attributeName.equals(ClassConstants.ATTR_Code) ? (Attribute)new CodeAttribute():
attributeName.equals(ClassConstants.ATTR_StackMap) ? (Attribute)new StackMapAttribute():
attributeName.equals(ClassConstants.ATTR_StackMapTable) ? (Attribute)new StackMapTableAttribute():
attributeName.equals(ClassConstants.ATTR_LineNumberTable) ? (Attribute)new LineNumberTableAttribute():
attributeName.equals(ClassConstants.ATTR_LocalVariableTable) ? (Attribute)new LocalVariableTableAttribute():
attributeName.equals(ClassConstants.ATTR_LocalVariableTypeTable) ? (Attribute)new LocalVariableTypeTableAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeVisibleAnnotations) ? (Attribute)new RuntimeVisibleAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeInvisibleAnnotations) ? (Attribute)new RuntimeInvisibleAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeVisibleParameterAnnotations) ? (Attribute)new RuntimeVisibleParameterAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_RuntimeInvisibleParameterAnnotations) ? (Attribute)new RuntimeInvisibleParameterAnnotationsAttribute():
attributeName.equals(ClassConstants.ATTR_AnnotationDefault) ? (Attribute)new AnnotationDefaultAttribute():
(Attribute)new UnknownAttribute(u4attributeLength);
attribute.u2attributeNameIndex = u2attributeNameIndex;
return attribute;
}
private StackMapFrame createStackMapFrame()
{
int u1tag = dataInput.readUnsignedByte();
return
u1tag < StackMapFrame.SAME_ONE_FRAME ? (StackMapFrame)new SameZeroFrame(u1tag) :
u1tag < StackMapFrame.SAME_ONE_FRAME_EXTENDED ? (StackMapFrame)new SameOneFrame(u1tag) :
u1tag < StackMapFrame.LESS_ZERO_FRAME ? (StackMapFrame)new SameOneFrame(u1tag) :
u1tag < StackMapFrame.SAME_ZERO_FRAME_EXTENDED ? (StackMapFrame)new LessZeroFrame(u1tag) :
u1tag < StackMapFrame.MORE_ZERO_FRAME ? (StackMapFrame)new SameZeroFrame(u1tag) :
u1tag < StackMapFrame.FULL_FRAME ? (StackMapFrame)new MoreZeroFrame(u1tag) :
(StackMapFrame)new FullFrame();
}
private VerificationType createVerificationType()
{
int u1tag = dataInput.readUnsignedByte();
switch (u1tag)
{
case VerificationType.INTEGER_TYPE: return new IntegerType();
case VerificationType.FLOAT_TYPE: return new FloatType();
case VerificationType.LONG_TYPE: return new LongType();
case VerificationType.DOUBLE_TYPE: return new DoubleType();
case VerificationType.TOP_TYPE: return new TopType();
case VerificationType.OBJECT_TYPE: return new ObjectType();
case VerificationType.NULL_TYPE: return new NullType();
case VerificationType.UNINITIALIZED_TYPE: return new UninitializedType();
case VerificationType.UNINITIALIZED_THIS_TYPE: return new UninitializedThisType();
default: throw new RuntimeException("Unknown verification type ["+u1tag+"] in stack map frame");
}
}
private ElementValue createElementValue()
{
int u1tag = dataInput.readUnsignedByte();
switch (u1tag)
{
case ClassConstants.INTERNAL_TYPE_BOOLEAN:
case ClassConstants.INTERNAL_TYPE_BYTE:
case ClassConstants.INTERNAL_TYPE_CHAR:
case ClassConstants.INTERNAL_TYPE_SHORT:
case ClassConstants.INTERNAL_TYPE_INT:
case ClassConstants.INTERNAL_TYPE_FLOAT:
case ClassConstants.INTERNAL_TYPE_LONG:
case ClassConstants.INTERNAL_TYPE_DOUBLE:
case ClassConstants.ELEMENT_VALUE_STRING_CONSTANT: return new ConstantElementValue(u1tag);
case ClassConstants.ELEMENT_VALUE_ENUM_CONSTANT: return new EnumConstantElementValue();
case ClassConstants.ELEMENT_VALUE_CLASS: return new ClassElementValue();
case ClassConstants.ELEMENT_VALUE_ANNOTATION: return new AnnotationElementValue();
case ClassConstants.ELEMENT_VALUE_ARRAY: return new ArrayElementValue();
default: throw new IllegalArgumentException("Unknown element value tag ["+u1tag+"]");
}
}
}