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Java > Open Source Codes > oracle > toplink > libraries > asm > tree > VarInsnNode


1 /***
2  * ASM: a very small and fast Java bytecode manipulation framework
3  * Copyright (c) 2000,2002,2003 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
31 package oracle.toplink.libraries.asm.tree;
32
33 import oracle.toplink.libraries.asm.CodeVisitor;
34
35 /**
36  * A node that represents a local variable instruction. A local variable
37  * instruction is an instruction that loads or stores the value of a local
38  * variable.
39  *
40  * @author Eric Bruneton
41  */
42
43 public class VarInsnNode extends AbstractInsnNode {
44
45   /**
46    * The operand of this instruction. This operand is the index of a local
47    * variable.
48    */
49
50   public int var;
51
52   /**
53    * Visits a local variable instruction. A local variable instruction is an
54    * instruction that loads or stores the value of a local variable.
55    *
56    * @param opcode the opcode of the local variable instruction to be
57    * constructed. This opcode must be ILOAD, LLOAD, FLOAD, DLOAD, ALOAD,
58    * ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
59    * @param var the operand of the instruction to be constructed. This operand
60    * is the index of a local variable.
61    */
62
63   public VarInsnNode (final int opcode, final int var) {
64     super(opcode);
65     this.var = var;
66   }
67
68   /**
69    * Sets the opcode of this instruction.
70    *
71    * @param opcode the new instruction opcode. This opcode must be ILOAD, LLOAD,
72    * FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
73    */
74
75   public void setOpcode (final int opcode) {
76     this.opcode = opcode;
77   }
78
79   public void accept (final CodeVisitor cv) {
80     cv.visitVarInsn(opcode, var);
81   }
82 }
83
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