http://asm.ow2.org/: Utilities for ASM, a very small and fast Java bytecode manipulation framework (OW2)
  • Eric Bruneton
  • Eugene Kuleshov
  • Remi Forax 
// 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.
//
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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package org.objectweb.asm.util;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
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
/**
 * An abstract converter from visit events to text.
 *
 * @author Eric Bruneton
 */
public abstract class Printer {

  
The names of the Java Virtual Machine opcodes. 
/** 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 operand values of the MethodVisitor.visitIntInsn method when opcode is NEWARRAY. 
/**
   * 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 tag field values for Handle. 
/** 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. 
/** 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 Opcodes.ASM4, Opcodes.ASM5, Opcodes.ASM6 or Opcodes.ASM7. 
/**
   * 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}.
   */
  protected final int api;

  
The builder used to build strings in the various visit methods. 
/** 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.

/**
   * 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<Object> text;

  // -----------------------------------------------------------------------------------------------
  // Constructor
  // -----------------------------------------------------------------------------------------------

  
Constructs a new Printer. 
Params:
/**
   * 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}.
   */
  protected Printer(final int api) {
    this.api = api;
    this.stringBuilder = new StringBuilder();
    this.text = new ArrayList<>();
  }

  // -----------------------------------------------------------------------------------------------
  // Classes
  // -----------------------------------------------------------------------------------------------

  
Class header. See ClassVisitor.visit. 
Params:
  • 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.
  • access – the class's access flags (see Opcodes). This parameter also indicates if the class is deprecated.
  • name – the internal name of the class (see Type.getInternalName()).
  • 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.
  • superName – the internal of name of the super class (see Type.getInternalName()). For interfaces, the super class is Object. May be null, but only for the Object class.
  • interfaces – the internal names of the class's interfaces (see Type.getInternalName()). May be null.
/**
   * 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 {@literal 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 {@literal 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 {@literal null}.
   */
  public abstract void visit(
      int version,
      int access,
      String name,
      String signature,
      String superName,
      String[] interfaces);

  
Class source. See ClassVisitor.visitSource. 
Params:
  • source – the name of the source file from which the class was compiled. May be 
    null.
  • debug – additional debug information to compute the correspondence between source and compiled elements of the class. May be null.
/**
   * 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 {@literal
   *     null}.
   * @param debug additional debug information to compute the correspondence between source and
   *     compiled elements of the class. May be {@literal null}.
   */
  public abstract void visitSource(String source, String debug);

  
Params:
  • name – the fully qualified name (using dots) of the module.
  • access – the module access flags, among ACC_OPEN, ACC_SYNTHETIC and 
    ACC_MANDATED.
  • version – the module version, or null.
Returns:the printer.
/**
   * 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 {@literal null}.
   * @return the printer.
   */
  public Printer visitModule(final String name, final int access, final String version) {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  
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.

Params:
  • nestHost – the internal name of the host class of the nest.
/**
   * 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.
   */
  public void visitNestHost(final String nestHost) {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  
Class outer class. See ClassVisitor.visitOuterClass. 
Params:
  • owner – internal name of the enclosing class of the class.
  • 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.
  • 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.
/**
   * 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 {@literal 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 {@literal 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 ClassVisitor.visitAnnotation. 
Params:
  • descriptor – the class descriptor of the annotation class.
  • visible – true if the annotation is visible at runtime.
Returns:the printer.
/**
   * Class annotation. See {@link org.objectweb.asm.ClassVisitor#visitAnnotation}.
   *
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal true} if the annotation is visible at runtime.
   * @return the printer.
   */
  public abstract Printer visitClassAnnotation(String descriptor, boolean visible);

  
Class type annotation. See ClassVisitor.visitTypeAnnotation. 
Params:
Returns:the printer.
/**
   * 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 {@literal null} if the annotation targets
   *     'typeRef' as a whole.
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal 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 ClassVisitor.visitAttribute. 
Params:
  • attribute – an attribute.
/**
   * Class attribute. See {@link org.objectweb.asm.ClassVisitor#visitAttribute}.
   *
   * @param attribute an attribute.
   */
  public abstract void visitClassAttribute(Attribute attribute);

  
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.

Params:
  • nestMember – the internal name of a nest member.
/**
   * 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.
   */
  public void visitNestMember(final String nestMember) {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  
Class inner name. See ClassVisitor.visitInnerClass. 
Params:
  • name – the internal name of an inner class (see Type.getInternalName()).
  • outerName – the internal name of the class to which the inner class belongs (see Type.getInternalName()). May be null for not member classes.
  • innerName – the (simple) name of the inner class inside its enclosing class. May be null for anonymous inner classes.
  • access – the access flags of the inner class as originally declared in the enclosing
    class.
/**
   * 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 {@literal null} for not member classes.
   * @param innerName the (simple) name of the inner class inside its enclosing class. May be
   *     {@literal 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 ClassVisitor.visitField. 
Params:
  • access – the field's access flags (see Opcodes). This parameter also indicates if the field is synthetic and/or deprecated.
  • name – the field's name.
  • descriptor – the field's descriptor (see Type).
  • signature – the field's signature. May be null if the field's type does not use generic types.
  • value – the field's initial value. This parameter, which may be null if the field does not have an initial value, must be an Integer, a Float, a Long, a Double or a 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.
Returns:the printer.
/**
   * 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 {@literal null} if the field's type does not use
   *     generic types.
   * @param value the field's initial value. This parameter, which may be {@literal 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 {@code int}, {@code float}, {@code long}
   *     or {@code String} fields respectively). <i>This parameter is only used for static
   *     fields</i>. 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 ClassVisitor.visitMethod. 
Params:
  • access – the method's access flags (see Opcodes). This parameter also indicates if the method is synthetic and/or deprecated.
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
  • signature – the method's signature. May be null if the method parameters, return type and exceptions do not use generic types.
  • exceptions – the internal names of the method's exception classes (see Type.getInternalName()). May be null.
Returns:the printer.
/**
   * 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 {@literal 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 {@literal null}.
   * @return the printer.
   */
  public abstract Printer visitMethod(
      int access, String name, String descriptor, String signature, String[] exceptions);

  
Class end. See ClassVisitor.visitEnd. 
/** Class end. See {@link org.objectweb.asm.ClassVisitor#visitEnd}. */
  public abstract void visitClassEnd();

  // -----------------------------------------------------------------------------------------------
  // Modules
  // -----------------------------------------------------------------------------------------------

  
Module main class. See ModuleVisitor.visitMainClass. 
Params:
  • mainClass – the internal name of the main class of the current module.
/**
   * 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 ModuleVisitor.visitPackage. 
Params:
  • packaze – the internal name of a package.
/**
   * 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 ModuleVisitor.visitRequire. 
Params:
  • module – the fully qualified name (using dots) of the dependence.
  • access – the access flag of the dependence among ACC_TRANSITIVE, 
    ACC_STATIC_PHASE, ACC_SYNTHETIC and ACC_MANDATED.
  • version – the module version at compile time, or null.
/**
   * 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 {@literal null}.
   */
  public void visitRequire(final String module, final int access, final String version) {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  
Module export. See ModuleVisitor.visitExport. 
Params:
  • packaze – the internal name of the exported package.
  • access – the access flag of the exported package, valid values are among 
    ACC_SYNTHETIC and ACC_MANDATED.
  • modules – the fully qualified names (using dots) of the modules that can access the public classes of the exported package, or null.
/**
   * 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 {@literal null}.
   */
  public void visitExport(final String packaze, final int access, final String... modules) {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  
Module open. See ModuleVisitor.visitOpen. 
Params:
  • packaze – the internal name of the opened package.
  • access – the access flag of the opened package, valid values are among 
    ACC_SYNTHETIC and ACC_MANDATED.
  • modules – the fully qualified names (using dots) of the modules that can use deep reflection to the classes of the open package, or null.
/**
   * 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 {@literal null}.
   */
  public void visitOpen(final String packaze, final int access, final String... modules) {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  
Module use. See ModuleVisitor.visitUse. 
Params:
  • service – the internal name of the service.
/**
   * 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 ModuleVisitor.visitProvide. 
Params:
  • service – the internal name of the service.
  • providers – the internal names of the implementations of the service (there is at least
    one provider).
/**
   * 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 ModuleVisitor.visitEnd. 
/** Module end. See {@link org.objectweb.asm.ModuleVisitor#visitEnd}. */
  public void visitModuleEnd() {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  // -----------------------------------------------------------------------------------------------
  // Annotations
  // -----------------------------------------------------------------------------------------------

  
Annotation value. See AnnotationVisitor.visit. 
Params:
/**
   * 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).
   */
  // DontCheck(OverloadMethodsDeclarationOrder): overloads are semantically different.
  public abstract void visit(String name, Object value);

  
Annotation enum value. See AnnotationVisitor.visitEnum. 
Params:
  • name – the value name.
  • descriptor – the class descriptor of the enumeration class.
  • value – the actual enumeration 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 AnnotationVisitor.visitAnnotation. 
Params:
  • name – the value name.
  • descriptor – the class descriptor of the nested annotation class.
Returns:the printer.
/**
   * 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 AnnotationVisitor.visitArray. 
Params:
  • name – the value name.
Returns:the printer.
/**
   * 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 AnnotationVisitor.visitEnd. 
/** Annotation end. See {@link org.objectweb.asm.AnnotationVisitor#visitEnd}. */
  public abstract void visitAnnotationEnd();

  // -----------------------------------------------------------------------------------------------
  // Fields
  // -----------------------------------------------------------------------------------------------

  
Field annotation. See FieldVisitor.visitAnnotation. 
Params:
  • descriptor – the class descriptor of the annotation class.
  • visible – true if the annotation is visible at runtime.
Returns:the printer.
/**
   * Field annotation. See {@link org.objectweb.asm.FieldVisitor#visitAnnotation}.
   *
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal true} if the annotation is visible at runtime.
   * @return the printer.
   */
  public abstract Printer visitFieldAnnotation(String descriptor, boolean visible);

  
Field type annotation. See FieldVisitor.visitTypeAnnotation. 
Params:
  • typeRef – a reference to the annotated type. The sort of this type reference must be TypeReference.FIELD. See TypeReference.
  • 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.
  • descriptor – the class descriptor of the annotation class.
  • visible – true if the annotation is visible at runtime.
Returns:the printer.
/**
   * 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 {@literal null} if the annotation targets
   *     'typeRef' as a whole.
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal 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 FieldVisitor.visitAttribute. 
Params:
  • attribute – an attribute.
/**
   * Field attribute. See {@link org.objectweb.asm.FieldVisitor#visitAttribute}.
   *
   * @param attribute an attribute.
   */
  public abstract void visitFieldAttribute(Attribute attribute);

  
Field end. See FieldVisitor.visitEnd. 
/** Field end. See {@link org.objectweb.asm.FieldVisitor#visitEnd}. */
  public abstract void visitFieldEnd();

  // -----------------------------------------------------------------------------------------------
  // Methods
  // -----------------------------------------------------------------------------------------------

  
Params:
  • name – parameter name or null if none is provided.
  • access – the parameter's access flags, only ACC_FINAL, ACC_SYNTHETIC or/and ACC_MANDATED are allowed (see Opcodes).
/**
   * 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 {@code ACC_FINAL}, {@code ACC_SYNTHETIC}
   *     or/and {@code 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 MethodVisitor.visitAnnotationDefault. 
Returns:the printer.
/**
   * Method default annotation. See {@link org.objectweb.asm.MethodVisitor#visitAnnotationDefault}.
   *
   * @return the printer.
   */
  public abstract Printer visitAnnotationDefault();

  
Method annotation. See MethodVisitor.visitAnnotation. 
Params:
  • descriptor – the class descriptor of the annotation class.
  • visible – true if the annotation is visible at runtime.
Returns:the printer.
/**
   * Method annotation. See {@link org.objectweb.asm.MethodVisitor#visitAnnotation}.
   *
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal true} if the annotation is visible at runtime.
   * @return the printer.
   */
  public abstract Printer visitMethodAnnotation(String descriptor, boolean visible);

  
Method type annotation. See MethodVisitor.visitTypeAnnotation. 
Params:
Returns:the printer.
/**
   * 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 {@literal null} if the annotation targets
   *     'typeRef' as a whole.
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal 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 MethodVisitor.visitAnnotableParameterCount. 
Params:
  • 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).
  • 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.
Returns:the printer.
/**
   * 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 {@literal true} to define the number of method parameters that can have
   *     annotations visible at runtime, {@literal 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 MethodVisitor.visitParameterAnnotation. 
Params:
  • 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 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).
  • descriptor – the class descriptor of the annotation class.
  • visible – true if the annotation is visible at runtime.
Returns:the printer.
/**
   * 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: <i>a parameter index i
   *     is not required to correspond to the i'th parameter descriptor in the method
   *     descriptor</i>, 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 {@literal true} if the annotation is visible at runtime.
   * @return the printer.
   */
  public abstract Printer visitParameterAnnotation(
      int parameter, String descriptor, boolean visible);

  
Method attribute. See MethodVisitor.visitAttribute. 
Params:
  • attribute – an attribute.
/**
   * Method attribute. See {@link org.objectweb.asm.MethodVisitor#visitAttribute}.
   *
   * @param attribute an attribute.
   */
  public abstract void visitMethodAttribute(Attribute attribute);

  
Method start. See MethodVisitor.visitCode. 
/** Method start. See {@link org.objectweb.asm.MethodVisitor#visitCode}. */
  public abstract void visitCode();

  
Method stack frame. See MethodVisitor.visitFrame. 
Params:
/**
   * 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 numLocal 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 numStack 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 numLocal, Object[] local, int numStack, Object[] stack);

  
Method instruction. See MethodVisitor.visitInsn 
Params:
  • 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.
/**
   * 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 MethodVisitor.visitIntInsn. 
Params:
/**
   * 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.<br>
   *     When opcode is BIPUSH, operand value should be between Byte.MIN_VALUE and Byte.MAX_VALUE.
   *     <br>
   *     When opcode is SIPUSH, operand value should be between Short.MIN_VALUE and Short.MAX_VALUE.
   *     <br>
   *     When opcode is NEWARRAY, operand value should be one of {@link Opcodes#T_BOOLEAN}, {@link
   *     Opcodes#T_CHAR}, {@link Opcodes#T_FLOAT}, {@link Opcodes#T_DOUBLE}, {@link Opcodes#T_BYTE},
   *     {@link Opcodes#T_SHORT}, {@link Opcodes#T_INT} or {@link Opcodes#T_LONG}.
   */
  public abstract void visitIntInsn(int opcode, int operand);

  
Method instruction. See MethodVisitor.visitVarInsn. 
Params:
  • opcode – the opcode of the local variable instruction to be visited. This opcode is either
    ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
  • var – the operand of the instruction to be visited. This operand is the index of a local
    variable.
/**
   * Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitVarInsn}.
   *
   * @param opcode the opcode of the local variable instruction to be visited. This opcode is either
   *     ILOAD, LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
   * @param var the operand of the instruction to be visited. This operand is the index of a local
   *     variable.
   */
  public abstract void visitVarInsn(int opcode, int var);

  
Method instruction. See MethodVisitor.visitTypeInsn. 
Params:
  • opcode – the opcode of the type instruction to be visited. This opcode is either NEW,
    ANEWARRAY, CHECKCAST or INSTANCEOF.
  • type – the operand of the instruction to be visited. This operand must be the internal name of an object or array class (see Type.getInternalName()).
/**
   * Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitTypeInsn}.
   *
   * @param opcode the opcode of the type instruction to be visited. This opcode is either NEW,
   *     ANEWARRAY, CHECKCAST or INSTANCEOF.
   * @param type the operand of the instruction to be visited. This operand must be the internal
   *     name of an object or array class (see {@link org.objectweb.asm.Type#getInternalName()}).
   */
  public abstract void visitTypeInsn(int opcode, String type);

  
Method instruction. See MethodVisitor.visitFieldInsn. 
Params:
  • opcode – the opcode of the type instruction to be visited. This opcode is either
    GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
  • owner – the internal name of the field's owner class (see Type.getInternalName()).
  • name – the field's name.
  • descriptor – the field's descriptor (see Type).
/**
   * Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitFieldInsn}.
   *
   * @param opcode the opcode of the type instruction to be visited. This opcode is either
   *     GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
   * @param owner the internal name of the field's owner class (see {@link
   *     org.objectweb.asm.Type#getInternalName()}).
   * @param name the field's name.
   * @param descriptor the field's descriptor (see {@link org.objectweb.asm.Type}).
   */
  public abstract void visitFieldInsn(int opcode, String owner, String name, String descriptor);

  
Method instruction. See MethodVisitor.visitMethodInsn. 
Params:
  • opcode – the opcode of the type instruction to be visited. This opcode is either
    INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
  • owner – the internal name of the method's owner class (see Type.getInternalName()).
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
Deprecated:use visitMethodInsn(int, String, String, String, boolean) instead.
/**
   * Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitMethodInsn}.
   *
   * @param opcode the opcode of the type instruction to be visited. This opcode is either
   *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
   * @param owner the internal name of the method's owner class (see {@link
   *     org.objectweb.asm.Type#getInternalName()}).
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link org.objectweb.asm.Type}).
   * @deprecated use {@link #visitMethodInsn(int, String, String, String, boolean)} instead.
   */
  @Deprecated
  public void visitMethodInsn(
      final int opcode, final String owner, final String name, final String descriptor) {
    // This method was abstract before ASM5, and was therefore always overridden (without any
    // call to 'super'). Thus, at this point we necessarily have api >= ASM5, and we must then
    // redirect the method call to the ASM5 visitMethodInsn() method.
    visitMethodInsn(opcode, owner, name, descriptor, opcode == Opcodes.INVOKEINTERFACE);
  }

  
Method instruction. See MethodVisitor.visitMethodInsn. 
Params:
  • opcode – the opcode of the type instruction to be visited. This opcode is either
    INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
  • owner – the internal name of the method's owner class (see Type.getInternalName()).
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
  • isInterface – if the method's owner class is an interface.
/**
   * Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitMethodInsn}.
   *
   * @param opcode the opcode of the type instruction to be visited. This opcode is either
   *     INVOKEVIRTUAL, INVOKESPECIAL, INVOKESTATIC or INVOKEINTERFACE.
   * @param owner the internal name of the method's owner class (see {@link
   *     org.objectweb.asm.Type#getInternalName()}).
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link org.objectweb.asm.Type}).
   * @param isInterface if the method's owner class is an interface.
   */
  public void visitMethodInsn(
      final int opcode,
      final String owner,
      final String name,
      final String descriptor,
      final boolean isInterface) {
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  
Method instruction. See MethodVisitor.visitInvokeDynamicInsn. 
Params:
  • name – the method's name.
  • descriptor – the method's descriptor (see Type).
  • bootstrapMethodHandle – the bootstrap method.
  • bootstrapMethodArguments – the bootstrap method constant arguments. Each argument must be an Integer, Float, Long, Double, String, Type or Handle value. This method is allowed to modify the content of the array so a caller should expect that this array may change.
/**
   * Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitInvokeDynamicInsn}.
   *
   * @param name the method's name.
   * @param descriptor the method's descriptor (see {@link org.objectweb.asm.Type}).
   * @param bootstrapMethodHandle the bootstrap method.
   * @param bootstrapMethodArguments the bootstrap method constant arguments. Each argument must be
   *     an {@link Integer}, {@link Float}, {@link Long}, {@link Double}, {@link String}, {@link
   *     org.objectweb.asm.Type} or {@link Handle} value. This method is allowed to modify the
   *     content of the array so a caller should expect that this array may change.
   */
  public abstract void visitInvokeDynamicInsn(
      String name,
      String descriptor,
      Handle bootstrapMethodHandle,
      Object... bootstrapMethodArguments);

  
Method jump instruction. See MethodVisitor.visitJumpInsn. 
Params:
  • opcode – the opcode of the type instruction to be visited. This opcode is either IFEQ,
    IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT,
    IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
  • label – the operand of the instruction to be visited. This operand is a label that
    designates the instruction to which the jump instruction may jump.
/**
   * Method jump instruction. See {@link org.objectweb.asm.MethodVisitor#visitJumpInsn}.
   *
   * @param opcode the opcode of the type instruction to be visited. This opcode is either IFEQ,
   *     IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT,
   *     IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
   * @param label the operand of the instruction to be visited. This operand is a label that
   *     designates the instruction to which the jump instruction may jump.
   */
  public abstract void visitJumpInsn(int opcode, Label label);

  
Method label. See MethodVisitor.visitLabel. 
Params:
  • label – a Label object.
/**
   * Method label. See {@link org.objectweb.asm.MethodVisitor#visitLabel}.
   *
   * @param label a {@link Label} object.
   */
  public abstract void visitLabel(Label label);

  
Method instruction. See MethodVisitor.visitLdcInsn. 
Params:
  • value – the constant to be loaded on the stack. This parameter must be a non null Integer, a Float, a Long, a Double, a String, a Type of OBJECT or ARRAY sort for .class constants, for classes whose version is 49, a Type of METHOD sort for MethodType, a Handle for MethodHandle constants, for classes whose version is 51 or a ConstantDynamic for a constant dynamic for classes whose version is 55.
/**
   * Method instruction. See {@link org.objectweb.asm.MethodVisitor#visitLdcInsn}.
   *
   * @param value the constant to be loaded on the stack. This parameter must be a non null {@link
   *     Integer}, a {@link Float}, a {@link Long}, a {@link Double}, a {@link String}, a {@link
   *     Type} of OBJECT or ARRAY sort for {@code .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 MethodVisitor.visitIincInsn. 
Params:
  • var – index of the local variable to be incremented.
  • increment – amount to increment the local variable by.
/**
   * 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 MethodVisitor.visitTableSwitchInsn. 
Params:
  • min – the minimum key value.
  • max – the maximum key value.
  • dflt – beginning of the default handler block.
  • labels – beginnings of the handler blocks. labels[i] is the beginning of the handler block for the min + i key.
/**
   * 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. {@code labels[i]} is the beginning of the
   *     handler block for the {@code min + i} key.
   */
  public abstract void visitTableSwitchInsn(int min, int max, Label dflt, Label... labels);

  
Method instruction. See MethodVisitor.visitLookupSwitchInsn. 
Params:
  • dflt – beginning of the default handler block.
  • keys – the values of the keys.
  • labels – beginnings of the handler blocks. labels[i] is the beginning of the handler block for the keys[i] key.
/**
   * 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. {@code labels[i]} is the beginning of the
   *     handler block for the {@code keys[i]} key.
   */
  public abstract void visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels);

  
Method instruction. See MethodVisitor.visitMultiANewArrayInsn. 
Params:
  • descriptor – an array type descriptor (see Type).
  • numDimensions – the number of dimensions of the array to allocate.
/**
   * 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 MethodVisitor.visitInsnAnnotation. 
Params:
Returns:the printer.
/**
   * 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 {@literal null} if the annotation targets
   *     'typeRef' as a whole.
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal 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 MethodVisitor.visitTryCatchBlock. 
Params:
  • start – the beginning of the exception handler's scope (inclusive).
  • end – the end of the exception handler's scope (exclusive).
  • handler – the beginning of the exception handler's code.
  • type – the internal name of the type of exceptions handled by the handler, or 
    null to catch any exceptions (for "finally" blocks).
/**
   * 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 {@literal
   *     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 MethodVisitor.visitTryCatchAnnotation. 
Params:
  • typeRef – a reference to the annotated type. The sort of this type reference must be TypeReference.EXCEPTION_PARAMETER. See TypeReference.
  • 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.
  • descriptor – the class descriptor of the annotation class.
  • visible – true if the annotation is visible at runtime.
Returns:the printer.
/**
   * 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 {@literal null} if the annotation targets
   *     'typeRef' as a whole.
   * @param descriptor the class descriptor of the annotation class.
   * @param visible {@literal 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 MethodVisitor.visitLocalVariable. 
Params:
  • name – the name of a local variable.
  • descriptor – the type descriptor of this local variable.
  • signature – the type signature of this local variable. May be null if the local variable type does not use generic types.
  • start – the first instruction corresponding to the scope of this local variable
    (inclusive).
  • end – the last instruction corresponding to the scope of this local variable (exclusive).
  • index – the local variable's index.
/**
   * 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 {@literal 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 MethodVisitor.visitTryCatchAnnotation. 
Params:
  • typeRef – a reference to the annotated type. The sort of this type reference must be TypeReference.LOCAL_VARIABLE or TypeReference.RESOURCE_VARIABLE. See TypeReference.
  • 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.
  • start – the fist instructions corresponding to the continuous ranges that make the scope
    of this local variable (inclusive).
  • 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.
  • index – the local variable's index in each range. This array must have the same size as
    the 'start' array.
  • descriptor – the class descriptor of the annotation class.
  • visible – true if the annotation is visible at runtime.
Returns:the printer.
/**
   * 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 {@literal 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 {@literal 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 MethodVisitor.visitLineNumber. 
Params:
  • line – a line number. This number refers to the source file from which the class was
    compiled.
  • start – the first instruction corresponding to this line number.
/**
   * 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 MethodVisitor.visitMaxs. 
Params:
  • maxStack – maximum stack size of the method.
  • maxLocals – maximum number of local variables for the method.
/**
   * 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 MethodVisitor.visitEnd. 
/** Method end. See {@link org.objectweb.asm.MethodVisitor#visitEnd}. */
  public abstract void visitMethodEnd();

  // -----------------------------------------------------------------------------------------------
  // Print and utility methods
  // -----------------------------------------------------------------------------------------------

  
Returns the text constructed by this visitor.

Returns:the text constructed by this visitor. See text.
/**
   * Returns the text constructed by this visitor.
   *
   * @return the text constructed by this visitor. See {@link #text}.
   */
  public List<Object> getText() {
    return text;
  }

  
Prints the text constructed by this visitor.

Params:
  • printWriter – the print writer to be used.
/**
   * 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.

Params:
  • printWriter – the writer to be used to print the tree.
  • list – a string tree, i.e., a string list that can contain other string lists, and so on
    recursively.
/**
   * 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 builder.

Params:
  • stringBuilder – the buffer where the string must be added.
  • string – the string to be added.
/**
   * 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 given output.

Command line arguments: [-debug] <binary class name or class file name >

Params:
  • args – the command line arguments.
  • usage – the help message to show when command line arguments are incorrect.
  • printer – the printer to convert the class into text.
  • output – where to print the result.
  • logger – where to log errors.
Throws:
  • IOException – if the class cannot be found, or if an IOException occurs.
/**
   * Prints a the given class to the given output.
   *
   * <p>Command line arguments: [-debug] &lt;binary class name or class file name &gt;
   *
   * @param args the command line arguments.
   * @param usage the help message to show when command line arguments are incorrect.
   * @param printer the printer to convert the class into text.
   * @param output where to print the result.
   * @param logger where to log errors.
   * @throws IOException if the class cannot be found, or if an IOException occurs.
   */
  static void main(
      final String[] args,
      final String usage,
      final Printer printer,
      final PrintWriter output,
      final PrintWriter logger)
      throws IOException {
    if (args.length < 1 || args.length > 2 || (args[0].equals("-debug") && args.length != 2)) {
      logger.println(usage);
      return;
    }

    TraceClassVisitor traceClassVisitor = new TraceClassVisitor(null, printer, output);

    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) {
      InputStream inputStream =
          new FileInputStream(className); // NOPMD(AvoidFileStream): can't fix for 1.5 compatibility
      new ClassReader(inputStream).accept(traceClassVisitor, parsingOptions);
    } else {
      new ClassReader(className).accept(traceClassVisitor, parsingOptions);
    }
  }
}