1 /*** 2 * ASM: a very small and fast Java bytecode manipulation framework 3 * Copyright (c) 2000-2005 INRIA, France Telecom 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the copyright holders nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 package org.objectweb.asm.tree; 31 32 import org.objectweb.asm.MethodVisitor; 33 34 /** 35 * A node that represents a bytecode instruction. 36 * 37 * @author Eric Bruneton 38 */ 39 public abstract class AbstractInsnNode { 40 41 /** 42 * The type of {@link InsnNode} instructions. 43 */ 44 public final static int INSN = 0; 45 46 /** 47 * The type of {@link IntInsnNode} instructions. 48 */ 49 public final static int INT_INSN = 1; 50 51 /** 52 * The type of {@link VarInsnNode} instructions. 53 */ 54 public final static int VAR_INSN = 2; 55 56 /** 57 * The type of {@link TypeInsnNode} instructions. 58 */ 59 public final static int TYPE_INSN = 3; 60 61 /** 62 * The type of {@link FieldInsnNode} instructions. 63 */ 64 public final static int FIELD_INSN = 4; 65 66 /** 67 * The type of {@link MethodInsnNode} instructions. 68 */ 69 public final static int METHOD_INSN = 5; 70 71 /** 72 * The type of {@link JumpInsnNode} instructions. 73 */ 74 public final static int JUMP_INSN = 6; 75 76 /** 77 * The type of {@link LabelNode} "instructions". 78 */ 79 public final static int LABEL = 7; 80 81 /** 82 * The type of {@link LdcInsnNode} instructions. 83 */ 84 public final static int LDC_INSN = 8; 85 86 /** 87 * The type of {@link IincInsnNode} instructions. 88 */ 89 public final static int IINC_INSN = 9; 90 91 /** 92 * The type of {@link TableSwitchInsnNode} instructions. 93 */ 94 public final static int TABLESWITCH_INSN = 10; 95 96 /** 97 * The type of {@link LookupSwitchInsnNode} instructions. 98 */ 99 public final static int LOOKUPSWITCH_INSN = 11; 100 101 /** 102 * The type of {@link MultiANewArrayInsnNode} instructions. 103 */ 104 public final static int MULTIANEWARRAY_INSN = 12; 105 106 /** 107 * The opcode of this instruction. 108 */ 109 protected int opcode; 110 111 /** 112 * Constructs a new {@link AbstractInsnNode}. 113 * 114 * @param opcode the opcode of the instruction to be constructed. 115 */ AbstractInsnNode(final int opcode)116 protected AbstractInsnNode(final int opcode) { 117 this.opcode = opcode; 118 } 119 120 /** 121 * Returns the opcode of this instruction. 122 * 123 * @return the opcode of this instruction. 124 */ getOpcode()125 public int getOpcode() { 126 return opcode; 127 } 128 129 /** 130 * Returns the type of this instruction. 131 * 132 * @return the type of this instruction, i.e. one the constants defined in 133 * this class. 134 */ getType()135 public abstract int getType(); 136 137 /** 138 * Makes the given code visitor visit this instruction. 139 * 140 * @param cv a code visitor. 141 */ accept(final MethodVisitor cv)142 public abstract void accept(final MethodVisitor cv); 143 } 144