// 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
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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
 */
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}.
   */
  protected final int api;

  /**
   * A buffer that can be used to create strings.
   *
   * @deprecated use {@link #stringBuilder} instead.
   */
  @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<Object> 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}.
   */
  protected Printer(final int api) {
    this.api = api;
    this.buf = null;
    this.stringBuilder = new StringBuilder();
    this.text = new ArrayList<Object>();
  }

  // -----------------------------------------------------------------------------------------------
  // 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 {@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 {@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);

  /**
   * 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.
   *
   * @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 {@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 {@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 {@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 {@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.
   *
   * @param nestMember the internal name of a nest member.
   */
  public void visitNestMember(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 {@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 {@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 {@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 {@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 {@literal 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 {@literal 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 {@literal 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).
   */
  // DontCheck(OverloadMethodsDeclarationOrder): overloads are semantically different.
  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 {@literal 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 {@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 {@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 {@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 {@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 {@literal 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 {@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 {@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 {@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 {@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 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 {@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.<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 {@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 {@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 {@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 {@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) {
    if (api >= Opcodes.ASM5) {
      boolean isInterface = opcode == Opcodes.INVOKEINTERFACE;
      visitMethodInsn(opcode, owner, name, descriptor, isInterface);
      return;
    }
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

  /**
   * 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) {
    if (api < Opcodes.ASM5) {
      if (isInterface != (opcode == Opcodes.INVOKEINTERFACE)) {
        throw new IllegalArgumentException("INVOKESPECIAL/STATIC on interfaces require ASM 5");
      }
      visitMethodInsn(opcode, owner, name, descriptor);
      return;
    }
    throw new UnsupportedOperationException(UNSUPPORTED_OPERATION);
  }

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

  /**
   * 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 {@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. {@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 {@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 {@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 {@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 {@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 {@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 {@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 {@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 {@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<Object> 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 use {@link #appendString(StringBuilder, String)} instead.
   */
  @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.
   *
   * <p>Command line arguments: [-debug] &lt;binary class name or class file name &gt;
   *
   * @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) {
      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);
    }
  }
}
