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org.objectweb.asm.util.Printer Maven / Gradle / Ivy
Utilities for ASM, a very small and fast Java bytecode manipulation framework
// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm.util;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ConstantDynamic;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import org.objectweb.asm.TypePath;
/**
* An abstract converter from visit events to text.
*
* @author Eric Bruneton
*/
public abstract class Printer {
/** The names of the Java Virtual Machine opcodes. */
public static final String[] OPCODES = {
"NOP", // 0 (0x0)
"ACONST_NULL", // 1 (0x1)
"ICONST_M1", // 2 (0x2)
"ICONST_0", // 3 (0x3)
"ICONST_1", // 4 (0x4)
"ICONST_2", // 5 (0x5)
"ICONST_3", // 6 (0x6)
"ICONST_4", // 7 (0x7)
"ICONST_5", // 8 (0x8)
"LCONST_0", // 9 (0x9)
"LCONST_1", // 10 (0xa)
"FCONST_0", // 11 (0xb)
"FCONST_1", // 12 (0xc)
"FCONST_2", // 13 (0xd)
"DCONST_0", // 14 (0xe)
"DCONST_1", // 15 (0xf)
"BIPUSH", // 16 (0x10)
"SIPUSH", // 17 (0x11)
"LDC", // 18 (0x12)
"LDC_W", // 19 (0x13)
"LDC2_W", // 20 (0x14)
"ILOAD", // 21 (0x15)
"LLOAD", // 22 (0x16)
"FLOAD", // 23 (0x17)
"DLOAD", // 24 (0x18)
"ALOAD", // 25 (0x19)
"ILOAD_0", // 26 (0x1a)
"ILOAD_1", // 27 (0x1b)
"ILOAD_2", // 28 (0x1c)
"ILOAD_3", // 29 (0x1d)
"LLOAD_0", // 30 (0x1e)
"LLOAD_1", // 31 (0x1f)
"LLOAD_2", // 32 (0x20)
"LLOAD_3", // 33 (0x21)
"FLOAD_0", // 34 (0x22)
"FLOAD_1", // 35 (0x23)
"FLOAD_2", // 36 (0x24)
"FLOAD_3", // 37 (0x25)
"DLOAD_0", // 38 (0x26)
"DLOAD_1", // 39 (0x27)
"DLOAD_2", // 40 (0x28)
"DLOAD_3", // 41 (0x29)
"ALOAD_0", // 42 (0x2a)
"ALOAD_1", // 43 (0x2b)
"ALOAD_2", // 44 (0x2c)
"ALOAD_3", // 45 (0x2d)
"IALOAD", // 46 (0x2e)
"LALOAD", // 47 (0x2f)
"FALOAD", // 48 (0x30)
"DALOAD", // 49 (0x31)
"AALOAD", // 50 (0x32)
"BALOAD", // 51 (0x33)
"CALOAD", // 52 (0x34)
"SALOAD", // 53 (0x35)
"ISTORE", // 54 (0x36)
"LSTORE", // 55 (0x37)
"FSTORE", // 56 (0x38)
"DSTORE", // 57 (0x39)
"ASTORE", // 58 (0x3a)
"ISTORE_0", // 59 (0x3b)
"ISTORE_1", // 60 (0x3c)
"ISTORE_2", // 61 (0x3d)
"ISTORE_3", // 62 (0x3e)
"LSTORE_0", // 63 (0x3f)
"LSTORE_1", // 64 (0x40)
"LSTORE_2", // 65 (0x41)
"LSTORE_3", // 66 (0x42)
"FSTORE_0", // 67 (0x43)
"FSTORE_1", // 68 (0x44)
"FSTORE_2", // 69 (0x45)
"FSTORE_3", // 70 (0x46)
"DSTORE_0", // 71 (0x47)
"DSTORE_1", // 72 (0x48)
"DSTORE_2", // 73 (0x49)
"DSTORE_3", // 74 (0x4a)
"ASTORE_0", // 75 (0x4b)
"ASTORE_1", // 76 (0x4c)
"ASTORE_2", // 77 (0x4d)
"ASTORE_3", // 78 (0x4e)
"IASTORE", // 79 (0x4f)
"LASTORE", // 80 (0x50)
"FASTORE", // 81 (0x51)
"DASTORE", // 82 (0x52)
"AASTORE", // 83 (0x53)
"BASTORE", // 84 (0x54)
"CASTORE", // 85 (0x55)
"SASTORE", // 86 (0x56)
"POP", // 87 (0x57)
"POP2", // 88 (0x58)
"DUP", // 89 (0x59)
"DUP_X1", // 90 (0x5a)
"DUP_X2", // 91 (0x5b)
"DUP2", // 92 (0x5c)
"DUP2_X1", // 93 (0x5d)
"DUP2_X2", // 94 (0x5e)
"SWAP", // 95 (0x5f)
"IADD", // 96 (0x60)
"LADD", // 97 (0x61)
"FADD", // 98 (0x62)
"DADD", // 99 (0x63)
"ISUB", // 100 (0x64)
"LSUB", // 101 (0x65)
"FSUB", // 102 (0x66)
"DSUB", // 103 (0x67)
"IMUL", // 104 (0x68)
"LMUL", // 105 (0x69)
"FMUL", // 106 (0x6a)
"DMUL", // 107 (0x6b)
"IDIV", // 108 (0x6c)
"LDIV", // 109 (0x6d)
"FDIV", // 110 (0x6e)
"DDIV", // 111 (0x6f)
"IREM", // 112 (0x70)
"LREM", // 113 (0x71)
"FREM", // 114 (0x72)
"DREM", // 115 (0x73)
"INEG", // 116 (0x74)
"LNEG", // 117 (0x75)
"FNEG", // 118 (0x76)
"DNEG", // 119 (0x77)
"ISHL", // 120 (0x78)
"LSHL", // 121 (0x79)
"ISHR", // 122 (0x7a)
"LSHR", // 123 (0x7b)
"IUSHR", // 124 (0x7c)
"LUSHR", // 125 (0x7d)
"IAND", // 126 (0x7e)
"LAND", // 127 (0x7f)
"IOR", // 128 (0x80)
"LOR", // 129 (0x81)
"IXOR", // 130 (0x82)
"LXOR", // 131 (0x83)
"IINC", // 132 (0x84)
"I2L", // 133 (0x85)
"I2F", // 134 (0x86)
"I2D", // 135 (0x87)
"L2I", // 136 (0x88)
"L2F", // 137 (0x89)
"L2D", // 138 (0x8a)
"F2I", // 139 (0x8b)
"F2L", // 140 (0x8c)
"F2D", // 141 (0x8d)
"D2I", // 142 (0x8e)
"D2L", // 143 (0x8f)
"D2F", // 144 (0x90)
"I2B", // 145 (0x91)
"I2C", // 146 (0x92)
"I2S", // 147 (0x93)
"LCMP", // 148 (0x94)
"FCMPL", // 149 (0x95)
"FCMPG", // 150 (0x96)
"DCMPL", // 151 (0x97)
"DCMPG", // 152 (0x98)
"IFEQ", // 153 (0x99)
"IFNE", // 154 (0x9a)
"IFLT", // 155 (0x9b)
"IFGE", // 156 (0x9c)
"IFGT", // 157 (0x9d)
"IFLE", // 158 (0x9e)
"IF_ICMPEQ", // 159 (0x9f)
"IF_ICMPNE", // 160 (0xa0)
"IF_ICMPLT", // 161 (0xa1)
"IF_ICMPGE", // 162 (0xa2)
"IF_ICMPGT", // 163 (0xa3)
"IF_ICMPLE", // 164 (0xa4)
"IF_ACMPEQ", // 165 (0xa5)
"IF_ACMPNE", // 166 (0xa6)
"GOTO", // 167 (0xa7)
"JSR", // 168 (0xa8)
"RET", // 169 (0xa9)
"TABLESWITCH", // 170 (0xaa)
"LOOKUPSWITCH", // 171 (0xab)
"IRETURN", // 172 (0xac)
"LRETURN", // 173 (0xad)
"FRETURN", // 174 (0xae)
"DRETURN", // 175 (0xaf)
"ARETURN", // 176 (0xb0)
"RETURN", // 177 (0xb1)
"GETSTATIC", // 178 (0xb2)
"PUTSTATIC", // 179 (0xb3)
"GETFIELD", // 180 (0xb4)
"PUTFIELD", // 181 (0xb5)
"INVOKEVIRTUAL", // 182 (0xb6)
"INVOKESPECIAL", // 183 (0xb7)
"INVOKESTATIC", // 184 (0xb8)
"INVOKEINTERFACE", // 185 (0xb9)
"INVOKEDYNAMIC", // 186 (0xba)
"NEW", // 187 (0xbb)
"NEWARRAY", // 188 (0xbc)
"ANEWARRAY", // 189 (0xbd)
"ARRAYLENGTH", // 190 (0xbe)
"ATHROW", // 191 (0xbf)
"CHECKCAST", // 192 (0xc0)
"INSTANCEOF", // 193 (0xc1)
"MONITORENTER", // 194 (0xc2)
"MONITOREXIT", // 195 (0xc3)
"WIDE", // 196 (0xc4)
"MULTIANEWARRAY", // 197 (0xc5)
"IFNULL", // 198 (0xc6)
"IFNONNULL" // 199 (0xc7)
};
/**
* The names of the {@code operand} values of the {@link
* org.objectweb.asm.MethodVisitor#visitIntInsn} method when {@code opcode} is {@code NEWARRAY}.
*/
public static final String[] TYPES = {
"",
"",
"",
"",
"T_BOOLEAN",
"T_CHAR",
"T_FLOAT",
"T_DOUBLE",
"T_BYTE",
"T_SHORT",
"T_INT",
"T_LONG"
};
/** The names of the {@code tag} field values for {@link org.objectweb.asm.Handle}. */
public static final String[] HANDLE_TAG = {
"",
"H_GETFIELD",
"H_GETSTATIC",
"H_PUTFIELD",
"H_PUTSTATIC",
"H_INVOKEVIRTUAL",
"H_INVOKESTATIC",
"H_INVOKESPECIAL",
"H_NEWINVOKESPECIAL",
"H_INVOKEINTERFACE"
};
/** Message of the UnsupportedOperationException thrown by methods which must be overridden. */
private static final String UNSUPPORTED_OPERATION = "Must be overridden";
/**
* The ASM API version implemented by this class. The value of this field must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link Opcodes#ASM7_EXPERIMENTAL}.
*/
protected final int api;
/**
* A buffer that can be used to create strings.
*
* @deprecated
*/
@Deprecated protected final StringBuffer buf;
/** The builder used to build strings in the various visit methods. */
protected final StringBuilder stringBuilder;
/**
* The text to be printed. Since the code of methods is not necessarily visited in sequential
* order, one method after the other, but can be interlaced (some instructions from method one,
* then some instructions from method two, then some instructions from method one again...), it is
* not possible to print the visited instructions directly to a sequential stream. A class is
* therefore printed in a two steps process: a string tree is constructed during the visit, and
* printed to a sequential stream at the end of the visit. This string tree is stored in this
* field, as a string list that can contain other string lists, which can themselves contain other
* string lists, and so on.
*/
public final List text;
// -----------------------------------------------------------------------------------------------
// Constructor
// -----------------------------------------------------------------------------------------------
/**
* Constructs a new {@link Printer}.
*
* @param api the ASM API version implemented by this printer. Must be one of {@link
* Opcodes#ASM4}, {@link Opcodes#ASM5}, {@link Opcodes#ASM6} or {@link
* Opcodes#ASM7_EXPERIMENTAL}.
*/
protected Printer(final int api) {
this.api = api;
this.buf = null;
this.stringBuilder = new StringBuilder();
this.text = new ArrayList();
}
// -----------------------------------------------------------------------------------------------
// Classes
// -----------------------------------------------------------------------------------------------
/**
* Class header. See {@link org.objectweb.asm.ClassVisitor#visit}.
*
* @param version the class version. The minor version is stored in the 16 most significant bits,
* and the major version in the 16 least significant bits.
* @param access the class's access flags (see {@link Opcodes}). This parameter also indicates if
* the class is deprecated.
* @param name the internal name of the class (see {@link
* org.objectweb.asm.Type#getInternalName()}).
* @param signature the signature of this class. May be null if the class is not a
* generic one, and does not extend or implement generic classes or interfaces.
* @param superName the internal of name of the super class (see {@link
* org.objectweb.asm.Type#getInternalName()}). For interfaces, the super class is {@link
* Object}. May be null , but only for the {@link Object} class.
* @param interfaces the internal names of the class's interfaces (see {@link
* org.objectweb.asm.Type#getInternalName()}). May be null .
*/
public abstract void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces);
/**
* Class source. See {@link org.objectweb.asm.ClassVisitor#visitSource}.
*
* @param source the name of the source file from which the class was compiled. May be
* null .
* @param debug additional debug information to compute the correspondence between source and
* compiled elements of the class. May be null .
*/
public abstract void visitSource(String source, String debug);
/**
* Module. See {@link org.objectweb.asm.ClassVisitor#visitModule}.
*
* @param name the fully qualified name (using dots) of the module.
* @param access the module access flags, among {@code ACC_OPEN}, {@code ACC_SYNTHETIC} and {@code
* ACC_MANDATED}.
* @param version the module version, or null .
* @return the printer.
*/
public Printer visitModule(final String name, final int access, final String version) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Experimental, use at your own risk. This method will be renamed when it becomes stable, this
* will break existing code using it . Nest host class. See {@link
* org.objectweb.asm.ClassVisitor#visitNestHostExperimental}.
*
* Visits the nest host class of the class. A nest is a set of classes of the same package that
* share access to their private members. One of these classes, called the host, lists the other
* members of the nest, which in turn should link to the host of their nest. This method must be
* called only once and only if the visited class is a non-host member of a nest. A class is
* implicitly its own nest, so it's invalid to call this method with the visited class name as
* argument.
*
* @param nestHost the internal name of the host class of the nest.
* @deprecated This API is experimental.
*/
@Deprecated
public void visitNestHostExperimental(final String nestHost) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Class outer class. See {@link org.objectweb.asm.ClassVisitor#visitOuterClass}.
*
* @param owner internal name of the enclosing class of the class.
* @param name the name of the method that contains the class, or null if the class is
* not enclosed in a method of its enclosing class.
* @param descriptor the descriptor of the method that contains the class, or null if the
* class is not enclosed in a method of its enclosing class.
*/
public abstract void visitOuterClass(String owner, String name, String descriptor);
/**
* Class annotation. See {@link org.objectweb.asm.ClassVisitor#visitAnnotation}.
*
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public abstract Printer visitClassAnnotation(String descriptor, boolean visible);
/**
* Class type annotation. See {@link org.objectweb.asm.ClassVisitor#visitTypeAnnotation}.
*
* @param typeRef a reference to the annotated type. The sort of this type reference must be
* {@link org.objectweb.asm.TypeReference#CLASS_TYPE_PARAMETER}, {@link
* org.objectweb.asm.TypeReference#CLASS_TYPE_PARAMETER_BOUND} or {@link
* org.objectweb.asm.TypeReference#CLASS_EXTENDS}. See {@link
* org.objectweb.asm.TypeReference}.
* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
* static inner type within 'typeRef'. May be null if the annotation targets
* 'typeRef' as a whole.
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public Printer visitClassTypeAnnotation(
final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Class attribute. See {@link org.objectweb.asm.ClassVisitor#visitAttribute}.
*
* @param attribute an attribute.
*/
public abstract void visitClassAttribute(Attribute attribute);
/**
* Experimental, use at your own risk. This method will be renamed when it becomes stable, this
* will break existing code using it . Nest member name. See {@link
* org.objectweb.asm.ClassVisitor#visitNestMemberExperimental}.
*
*
Visits a member of the nest. A nest is a set of classes of the same package that share
* access to their private members. One of these classes, called the host, lists the other members
* of the nest, which in turn should link to the host of their nest. This method must be called
* only if the visited class is the host of a nest. A nest host is implicitly a member of its own
* nest, so it's invalid to call this method with the visited class name as argument.
*
* @param nestMember the internal name of a nest member.
* @deprecated This API is experimental.
*/
@Deprecated
public void visitNestMemberExperimental(final String nestMember) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Class inner name. See {@link org.objectweb.asm.ClassVisitor#visitInnerClass}.
*
* @param name the internal name of an inner class (see {@link
* org.objectweb.asm.Type#getInternalName()}).
* @param outerName the internal name of the class to which the inner class belongs (see {@link
* org.objectweb.asm.Type#getInternalName()}). May be null for not member classes.
* @param innerName the (simple) name of the inner class inside its enclosing class. May be
* null for anonymous inner classes.
* @param access the access flags of the inner class as originally declared in the enclosing
* class.
*/
public abstract void visitInnerClass(String name, String outerName, String innerName, int access);
/**
* Class field. See {@link org.objectweb.asm.ClassVisitor#visitField}.
*
* @param access the field's access flags (see {@link Opcodes}). This parameter also indicates if
* the field is synthetic and/or deprecated.
* @param name the field's name.
* @param descriptor the field's descriptor (see {@link org.objectweb.asm.Type}).
* @param signature the field's signature. May be null if the field's type does not use
* generic types.
* @param value the field's initial value. This parameter, which may be null if the field
* does not have an initial value, must be an {@link Integer}, a {@link Float}, a {@link
* Long}, a {@link Double} or a {@link String} (for int , float ,
* long or String fields respectively). This parameter is only used for
* static fields . Its value is ignored for non static fields, which must be initialized
* through bytecode instructions in constructors or methods.
* @return the printer.
*/
public abstract Printer visitField(
int access, String name, String descriptor, String signature, Object value);
/**
* Class method. See {@link org.objectweb.asm.ClassVisitor#visitMethod}.
*
* @param access the method's access flags (see {@link Opcodes}). This parameter also indicates if
* the method is synthetic and/or deprecated.
* @param name the method's name.
* @param descriptor the method's descriptor (see {@link org.objectweb.asm.Type}).
* @param signature the method's signature. May be null if the method parameters, return
* type and exceptions do not use generic types.
* @param exceptions the internal names of the method's exception classes (see {@link
* org.objectweb.asm.Type#getInternalName()}). May be null .
* @return the printer.
*/
public abstract Printer visitMethod(
int access, String name, String descriptor, String signature, String[] exceptions);
/** Class end. See {@link org.objectweb.asm.ClassVisitor#visitEnd}. */
public abstract void visitClassEnd();
// -----------------------------------------------------------------------------------------------
// Modules
// -----------------------------------------------------------------------------------------------
/**
* Module main class. See {@link org.objectweb.asm.ModuleVisitor#visitMainClass}.
*
* @param mainClass the internal name of the main class of the current module.
*/
public void visitMainClass(final String mainClass) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Module package. See {@link org.objectweb.asm.ModuleVisitor#visitPackage}.
*
* @param packaze the internal name of a package.
*/
public void visitPackage(final String packaze) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Module require. See {@link org.objectweb.asm.ModuleVisitor#visitRequire}.
*
* @param module the fully qualified name (using dots) of the dependence.
* @param access the access flag of the dependence among {@code ACC_TRANSITIVE}, {@code
* ACC_STATIC_PHASE}, {@code ACC_SYNTHETIC} and {@code ACC_MANDATED}.
* @param version the module version at compile time, or null .
*/
public void visitRequire(final String module, final int access, final String version) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Module export. See {@link org.objectweb.asm.ModuleVisitor#visitExport}.
*
* @param packaze the internal name of the exported package.
* @param access the access flag of the exported package, valid values are among {@code
* ACC_SYNTHETIC} and {@code ACC_MANDATED}.
* @param modules the fully qualified names (using dots) of the modules that can access the public
* classes of the exported package, or null .
*/
public void visitExport(final String packaze, final int access, final String... modules) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Module open. See {@link org.objectweb.asm.ModuleVisitor#visitOpen}.
*
* @param packaze the internal name of the opened package.
* @param access the access flag of the opened package, valid values are among {@code
* ACC_SYNTHETIC} and {@code ACC_MANDATED}.
* @param modules the fully qualified names (using dots) of the modules that can use deep
* reflection to the classes of the open package, or null .
*/
public void visitOpen(final String packaze, final int access, final String... modules) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Module use. See {@link org.objectweb.asm.ModuleVisitor#visitUse}.
*
* @param service the internal name of the service.
*/
public void visitUse(final String service) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Module provide. See {@link org.objectweb.asm.ModuleVisitor#visitProvide}.
*
* @param service the internal name of the service.
* @param providers the internal names of the implementations of the service (there is at least
* one provider).
*/
public void visitProvide(final String service, final String... providers) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/** Module end. See {@link org.objectweb.asm.ModuleVisitor#visitEnd}. */
public void visitModuleEnd() {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
// -----------------------------------------------------------------------------------------------
// Annotations
// -----------------------------------------------------------------------------------------------
/**
* Annotation value. See {@link org.objectweb.asm.AnnotationVisitor#visit}.
*
* @param name the value name.
* @param value the actual value, whose type must be {@link Byte}, {@link Boolean}, {@link
* Character}, {@link Short}, {@link Integer} , {@link Long}, {@link Float}, {@link Double},
* {@link String} or {@link org.objectweb.asm.Type} of {@link org.objectweb.asm.Type#OBJECT}
* or {@link org.objectweb.asm.Type#ARRAY} sort. This value can also be an array of byte,
* boolean, short, char, int, long, float or double values (this is equivalent to using {@link
* #visitArray} and visiting each array element in turn, but is more convenient).
*/
public abstract void visit(String name, Object value);
/**
* Annotation enum value. See {@link org.objectweb.asm.AnnotationVisitor#visitEnum}.
*
* @param name the value name.
* @param descriptor the class descriptor of the enumeration class.
* @param value the actual enumeration value.
*/
public abstract void visitEnum(String name, String descriptor, String value);
/**
* Nested annotation value. See {@link org.objectweb.asm.AnnotationVisitor#visitAnnotation}.
*
* @param name the value name.
* @param descriptor the class descriptor of the nested annotation class.
* @return the printer.
*/
public abstract Printer visitAnnotation(String name, String descriptor);
/**
* Annotation array value. See {@link org.objectweb.asm.AnnotationVisitor#visitArray}.
*
* @param name the value name.
* @return the printer.
*/
public abstract Printer visitArray(String name);
/** Annotation end. See {@link org.objectweb.asm.AnnotationVisitor#visitEnd}. */
public abstract void visitAnnotationEnd();
// -----------------------------------------------------------------------------------------------
// Fields
// -----------------------------------------------------------------------------------------------
/**
* Field annotation. See {@link org.objectweb.asm.FieldVisitor#visitAnnotation}.
*
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public abstract Printer visitFieldAnnotation(String descriptor, boolean visible);
/**
* Field type annotation. See {@link org.objectweb.asm.FieldVisitor#visitTypeAnnotation}.
*
* @param typeRef a reference to the annotated type. The sort of this type reference must be
* {@link org.objectweb.asm.TypeReference#FIELD}. See {@link org.objectweb.asm.TypeReference}.
* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
* static inner type within 'typeRef'. May be null if the annotation targets
* 'typeRef' as a whole.
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public Printer visitFieldTypeAnnotation(
final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Field attribute. See {@link org.objectweb.asm.FieldVisitor#visitAttribute}.
*
* @param attribute an attribute.
*/
public abstract void visitFieldAttribute(Attribute attribute);
/** Field end. See {@link org.objectweb.asm.FieldVisitor#visitEnd}. */
public abstract void visitFieldEnd();
// -----------------------------------------------------------------------------------------------
// Methods
// -----------------------------------------------------------------------------------------------
/**
* Method parameter. See {@link org.objectweb.asm.MethodVisitor#visitParameter(String, int)}.
*
* @param name parameter name or null if none is provided.
* @param access the parameter's access flags, only ACC_FINAL , ACC_SYNTHETIC
* or/and ACC_MANDATED are allowed (see {@link Opcodes}).
*/
public void visitParameter(final String name, final int access) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Method default annotation. See {@link org.objectweb.asm.MethodVisitor#visitAnnotationDefault}.
*
* @return the printer.
*/
public abstract Printer visitAnnotationDefault();
/**
* Method annotation. See {@link org.objectweb.asm.MethodVisitor#visitAnnotation}.
*
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public abstract Printer visitMethodAnnotation(String descriptor, boolean visible);
/**
* Method type annotation. See {@link org.objectweb.asm.MethodVisitor#visitTypeAnnotation}.
*
* @param typeRef a reference to the annotated type. The sort of this type reference must be
* {@link org.objectweb.asm.TypeReference#METHOD_TYPE_PARAMETER}, {@link
* org.objectweb.asm.TypeReference#METHOD_TYPE_PARAMETER_BOUND}, {@link
* org.objectweb.asm.TypeReference#METHOD_RETURN}, {@link
* org.objectweb.asm.TypeReference#METHOD_RECEIVER}, {@link
* org.objectweb.asm.TypeReference#METHOD_FORMAL_PARAMETER} or {@link
* org.objectweb.asm.TypeReference#THROWS}. See {@link org.objectweb.asm.TypeReference}.
* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
* static inner type within 'typeRef'. May be null if the annotation targets
* 'typeRef' as a whole.
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public Printer visitMethodTypeAnnotation(
final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Number of method parameters that can have annotations. See {@link
* org.objectweb.asm.MethodVisitor#visitAnnotableParameterCount}.
*
* @param parameterCount the number of method parameters than can have annotations. This number
* must be less or equal than the number of parameter types in the method descriptor. It can
* be strictly less when a method has synthetic parameters and when these parameters are
* ignored when computing parameter indices for the purpose of parameter annotations (see
* https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
* @param visible true to define the number of method parameters that can have
* annotations visible at runtime, false to define the number of method parameters
* that can have annotations invisible at runtime.
* @return the printer.
*/
public Printer visitAnnotableParameterCount(final int parameterCount, final boolean visible) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Method parameter annotation. See {@link
* org.objectweb.asm.MethodVisitor#visitParameterAnnotation}.
*
* @param parameter the parameter index. This index must be strictly smaller than the number of
* parameters in the method descriptor, and strictly smaller than the parameter count
* specified in {@link #visitAnnotableParameterCount}. Important note: a parameter index i
* is not required to correspond to the i'th parameter descriptor in the method
* descriptor , in particular in case of synthetic parameters (see
* https://docs.oracle.com/javase/specs/jvms/se9/html/jvms-4.html#jvms-4.7.18).
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public abstract Printer visitParameterAnnotation(
int parameter, String descriptor, boolean visible);
/**
* Method attribute. See {@link org.objectweb.asm.MethodVisitor#visitAttribute}.
*
* @param attribute an attribute.
*/
public abstract void visitMethodAttribute(Attribute attribute);
/** Method start. See {@link org.objectweb.asm.MethodVisitor#visitCode}. */
public abstract void visitCode();
/**
* Method stack frame. See {@link org.objectweb.asm.MethodVisitor#visitFrame}.
*
* @param type the type of this stack map frame. Must be {@link Opcodes#F_NEW} for expanded
* frames, or {@link Opcodes#F_FULL}, {@link Opcodes#F_APPEND}, {@link Opcodes#F_CHOP}, {@link
* Opcodes#F_SAME} or {@link Opcodes#F_APPEND}, {@link Opcodes#F_SAME1} for compressed frames.
* @param nLocal the number of local variables in the visited frame.
* @param local the local variable types in this frame. This array must not be modified. Primitive
* types are represented by {@link Opcodes#TOP}, {@link Opcodes#INTEGER}, {@link
* Opcodes#FLOAT}, {@link Opcodes#LONG}, {@link Opcodes#DOUBLE}, {@link Opcodes#NULL} or
* {@link Opcodes#UNINITIALIZED_THIS} (long and double are represented by a single element).
* Reference types are represented by String objects (representing internal names), and
* uninitialized types by Label objects (this label designates the NEW instruction that
* created this uninitialized value).
* @param nStack the number of operand stack elements in the visited frame.
* @param stack the operand stack types in this frame. This array must not be modified. Its
* content has the same format as the "local" array.
*/
public abstract void visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack);
/**
* Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitInsn}
*
* @param opcode the opcode of the instruction to be visited. This opcode is either 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, IALOAD, LALOAD,
* FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, 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, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I,
* D2L, D2F, I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN, FRETURN,
* DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW, MONITORENTER, or MONITOREXIT.
*/
public abstract void visitInsn(int opcode);
/**
* Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitIntInsn}.
*
* @param opcode the opcode of the instruction to be visited. This opcode is either BIPUSH, SIPUSH
* or NEWARRAY.
* @param operand the operand of the instruction to be visited..class constants, for classes whose version is
* 49, a {@link Type} of METHOD sort for MethodType, a {@link Handle} for MethodHandle
* constants, for classes whose version is 51 or a {@link ConstantDynamic} for a constant
* dynamic for classes whose version is 55.
*/
public abstract void visitLdcInsn(Object value);
/**
* Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitIincInsn}.
*
* @param var index of the local variable to be incremented.
* @param increment amount to increment the local variable by.
*/
public abstract void visitIincInsn(int var, int increment);
/**
* Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitTableSwitchInsn}.
*
* @param min the minimum key value.
* @param max the maximum key value.
* @param dflt beginning of the default handler block.
* @param labels beginnings of the handler blocks. labels[i] is the beginning of the
* handler block for the min + i key.
*/
public abstract void visitTableSwitchInsn(int min, int max, Label dflt, Label... labels);
/**
* Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitLookupSwitchInsn}.
*
* @param dflt beginning of the default handler block.
* @param keys the values of the keys.
* @param labels beginnings of the handler blocks. labels[i] is the beginning of the
* handler block for the keys[i] key.
*/
public abstract void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels);
/**
* Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitMultiANewArrayInsn}.
*
* @param descriptor an array type descriptor (see {@link org.objectweb.asm.Type}).
* @param numDimensions the number of dimensions of the array to allocate.
*/
public abstract void visitMultiANewArrayInsn(String descriptor, int numDimensions);
/**
* Instruction type annotation. See {@link org.objectweb.asm.MethodVisitor#visitInsnAnnotation}.
*
* @param typeRef a reference to the annotated type. The sort of this type reference must be
* {@link org.objectweb.asm.TypeReference#INSTANCEOF}, {@link
* org.objectweb.asm.TypeReference#NEW}, {@link
* org.objectweb.asm.TypeReference#CONSTRUCTOR_REFERENCE}, {@link
* org.objectweb.asm.TypeReference#METHOD_REFERENCE}, {@link
* org.objectweb.asm.TypeReference#CAST}, {@link
* org.objectweb.asm.TypeReference#CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT}, {@link
* org.objectweb.asm.TypeReference#METHOD_INVOCATION_TYPE_ARGUMENT}, {@link
* org.objectweb.asm.TypeReference#CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT}, or {@link
* org.objectweb.asm.TypeReference#METHOD_REFERENCE_TYPE_ARGUMENT}. See {@link
* org.objectweb.asm.TypeReference}.
* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
* static inner type within 'typeRef'. May be null if the annotation targets
* 'typeRef' as a whole.
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public Printer visitInsnAnnotation(
final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Method exception handler. See {@link org.objectweb.asm.MethodVisitor#visitTryCatchBlock}.
*
* @param start the beginning of the exception handler's scope (inclusive).
* @param end the end of the exception handler's scope (exclusive).
* @param handler the beginning of the exception handler's code.
* @param type the internal name of the type of exceptions handled by the handler, or
* null to catch any exceptions (for "finally" blocks).
*/
public abstract void visitTryCatchBlock(Label start, Label end, Label handler, String type);
/**
* Try catch block type annotation. See {@link
* org.objectweb.asm.MethodVisitor#visitTryCatchAnnotation}.
*
* @param typeRef a reference to the annotated type. The sort of this type reference must be
* {@link org.objectweb.asm.TypeReference#EXCEPTION_PARAMETER}. See {@link
* org.objectweb.asm.TypeReference}.
* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
* static inner type within 'typeRef'. May be null if the annotation targets
* 'typeRef' as a whole.
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public Printer visitTryCatchAnnotation(
final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Method debug info. See {@link org.objectweb.asm.MethodVisitor#visitLocalVariable}.
*
* @param name the name of a local variable.
* @param descriptor the type descriptor of this local variable.
* @param signature the type signature of this local variable. May be null if the local
* variable type does not use generic types.
* @param start the first instruction corresponding to the scope of this local variable
* (inclusive).
* @param end the last instruction corresponding to the scope of this local variable (exclusive).
* @param index the local variable's index.
*/
public abstract void visitLocalVariable(
String name, String descriptor, String signature, Label start, Label end, int index);
/**
* Local variable type annotation. See {@link
* org.objectweb.asm.MethodVisitor#visitTryCatchAnnotation}.
*
* @param typeRef a reference to the annotated type. The sort of this type reference must be
* {@link org.objectweb.asm.TypeReference#LOCAL_VARIABLE} or {@link
* org.objectweb.asm.TypeReference#RESOURCE_VARIABLE}. See {@link
* org.objectweb.asm.TypeReference}.
* @param typePath the path to the annotated type argument, wildcard bound, array element type, or
* static inner type within 'typeRef'. May be null if the annotation targets
* 'typeRef' as a whole.
* @param start the fist instructions corresponding to the continuous ranges that make the scope
* of this local variable (inclusive).
* @param end the last instructions corresponding to the continuous ranges that make the scope of
* this local variable (exclusive). This array must have the same size as the 'start' array.
* @param index the local variable's index in each range. This array must have the same size as
* the 'start' array.
* @param descriptor the class descriptor of the annotation class.
* @param visible true if the annotation is visible at runtime.
* @return the printer.
*/
public Printer visitLocalVariableAnnotation(
final int typeRef,
final TypePath typePath,
final Label[] start,
final Label[] end,
final int[] index,
final String descriptor,
final boolean visible) {
throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
}
/**
* Method debug info. See {@link org.objectweb.asm.MethodVisitor#visitLineNumber}.
*
* @param line a line number. This number refers to the source file from which the class was
* compiled.
* @param start the first instruction corresponding to this line number.
*/
public abstract void visitLineNumber(int line, Label start);
/**
* Method max stack and max locals. See {@link org.objectweb.asm.MethodVisitor#visitMaxs}.
*
* @param maxStack maximum stack size of the method.
* @param maxLocals maximum number of local variables for the method.
*/
public abstract void visitMaxs(int maxStack, int maxLocals);
/** Method end. See {@link org.objectweb.asm.MethodVisitor#visitEnd}. */
public abstract void visitMethodEnd();
// -----------------------------------------------------------------------------------------------
// Print and utility methods
// -----------------------------------------------------------------------------------------------
/**
* Returns the text constructed by this visitor.
*
* @return the text constructed by this visitor. See {@link #text}.
*/
public List getText() {
return text;
}
/**
* Prints the text constructed by this visitor.
*
* @param printWriter the print writer to be used.
*/
public void print(final PrintWriter printWriter) {
printList(printWriter, text);
}
/**
* Prints the given string tree.
*
* @param printWriter the writer to be used to print the tree.
* @param list a string tree, i.e., a string list that can contain other string lists, and so on
* recursively.
*/
static void printList(final PrintWriter printWriter, final List list) {
for (Object o : list) {
if (o instanceof List) {
printList(printWriter, (List) o);
} else {
printWriter.print(o.toString());
}
}
}
/**
* Appends a quoted string to the given string buffer.
*
* @param stringBuffer the buffer where the string must be added.
* @param string the string to be added.
* @deprecated
*/
@Deprecated
public static void appendString(final StringBuffer stringBuffer, final String string) {
StringBuilder stringBuilder = new StringBuilder();
appendString(stringBuilder, string);
stringBuffer.append(stringBuilder.toString());
}
/**
* Appends a quoted string to the given string builder.
*
* @param stringBuilder the buffer where the string must be added.
* @param string the string to be added.
*/
public static void appendString(final StringBuilder stringBuilder, final String string) {
stringBuilder.append('\"');
for (int i = 0; i < string.length(); ++i) {
char c = string.charAt(i);
if (c == '\n') {
stringBuilder.append("\\n");
} else if (c == '\r') {
stringBuilder.append("\\r");
} else if (c == '\\') {
stringBuilder.append("\\\\");
} else if (c == '"') {
stringBuilder.append("\\\"");
} else if (c < 0x20 || c > 0x7f) {
stringBuilder.append("\\u");
if (c < 0x10) {
stringBuilder.append("000");
} else if (c < 0x100) {
stringBuilder.append("00");
} else if (c < 0x1000) {
stringBuilder.append('0');
}
stringBuilder.append(Integer.toString(c, 16));
} else {
stringBuilder.append(c);
}
}
stringBuilder.append('\"');
}
/**
* Prints a the given class to the standard output.
*
* Command line arguments: [-debug] <binary class name or class file name >
*
* @param usage the help message to show when command line arguments are incorrect.
* @param printer the printer to convert the class into text.
* @param args the command line arguments.
* @throws IOException if the class cannot be found, or if an IOException occurs.
*/
static void main(final String usage, final Printer printer, final String[] args)
throws IOException {
if (args.length < 1 || args.length > 2 || (args[0].equals("-debug") && args.length != 2)) {
System.err.println(usage);
return;
}
TraceClassVisitor traceClassVisitor =
new TraceClassVisitor(null, printer, new PrintWriter(System.out));
String className;
int parsingOptions;
if (args[0].equals("-debug")) {
className = args[1];
parsingOptions = ClassReader.SKIP_DEBUG;
} else {
className = args[0];
parsingOptions = 0;
}
if (className.endsWith(".class")
|| className.indexOf('\\') != -1
|| className.indexOf('/') != -1) {
new ClassReader(new FileInputStream(className)).accept(traceClassVisitor, parsingOptions);
} else {
new ClassReader(className).accept(traceClassVisitor, parsingOptions);
}
}
}
