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


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 local variable instruction. A local variable
36  * instruction is an instruction that loads or stores the value of a local
37  * variable.
38  *
39  * @author Eric Bruneton
40  */
41 public class VarInsnNode extends AbstractInsnNode {
42
43     /**
44      * The operand of this instruction. This operand is the index of a local
45      * variable.
46      */
47     public int var;
48
49     /**
50      * Constructs a new {@link VarInsnNode}.
51      *
52      * @param opcode the opcode of the local variable instruction to be
53      * constructed. This opcode must be ILOAD, LLOAD, FLOAD, DLOAD,
54      * ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
55      * @param var the operand of the instruction to be constructed. This operand
56      * is the index of a local variable.
57      */
58     public VarInsnNode(final int opcode, final int var) {
59         super(opcode);
60         this.var = var;
61     }
62
63     /**
64      * Sets the opcode of this instruction.
65      *
66      * @param opcode the new instruction opcode. This opcode must be ILOAD,
67      * LLOAD, FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE
68      * or RET.
69      */
70     public void setOpcode(final int opcode) {
71         this.opcode = opcode;
72     }
73
74     public void accept(final MethodVisitor mv) {
75         mv.visitVarInsn(opcode, var);
76     }
77
78     public int getType() {
79         return VAR_INSN;
80     }
81 }
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