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Java > Open Source Codes > com > tc > asm > tree > AbstractInsnNode


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 com.tc.asm.tree;
31
32 import com.tc.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      */
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      */
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      */
135     public abstract int getType();
136
137     /**
138      * Makes the given code visitor visit this instruction.
139      *
140      * @param cv a code visitor.
141      */
142     public abstract void accept(final MethodVisitor cv);
143 }
144
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