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


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
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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.Label;
34 import oracle.toplink.libraries.asm.CodeVisitor;
35
36 /**
37  * A node that represents a jump instruction. A jump instruction is an
38  * instruction that may jump to another instruction.
39  *
40  * @author Eric Bruneton
41  */
42
43 public class JumpInsnNode extends AbstractInsnNode {
44
45   /**
46    * The operand of this instruction. This operand is a label that designates
47    * the instruction to which this instruction may jump.
48    */
49
50   public Label label;
51
52   /**
53    * Constructs a new {@link JumpInsnNode JumpInsnNode} object.
54    *
55    * @param opcode the opcode of the type instruction to be constructed. This
56    * opcode must be IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ,
57    * IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ,
58    * IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
59    * @param label the operand of the instruction to be constructed. This operand
60    * is a label that designates the instruction to which the jump
61    * instruction may jump.
62    */
63
64   public JumpInsnNode (final int opcode, final Label label) {
65     super(opcode);
66     this.label = label;
67   }
68
69   /**
70    * Sets the opcode of this instruction.
71    *
72    * @param opcode the new instruction opcode. This opcode must be
73    * IFEQ, IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE,
74    * IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE,
75    * GOTO, JSR, IFNULL or IFNONNULL.
76    */
77
78   public void setOpcode (final int opcode) {
79     this.opcode = opcode;
80   }
81
82   public void accept (final CodeVisitor cv) {
83     cv.visitJumpInsn(opcode, label);
84   }
85 }
86
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