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


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 zero operand instruction.
36  *
37  * @author Eric Bruneton
38  */
39 public class InsnNode extends AbstractInsnNode {
40
41     private final static InsnNode[] INSNS;
42
43     static {
44         INSNS = new InsnNode[255];
45         for (int i = 0; i < INSNS.length; ++i) {
46             INSNS[i] = new InsnNode(i);
47         }
48     }
49
50     /**
51      * Returns the {@link InsnNode} corresponding to the given opcode.
52      *
53      * @deprecated uses the constructor instead.
54      *
55      * @param opcode an instruction opcode.
56      * @return the {@link InsnNode} corresponding to the given opcode.
57      */
58     public final static InsnNode getByOpcode(final int opcode) {
59         return INSNS[opcode];
60     }
61
62     /**
63      * Constructs a new {@link InsnNode}.
64      *
65      * @param opcode the opcode of the instruction to be constructed. This
66      * opcode must be NOP, ACONST_NULL, ICONST_M1, ICONST_0, ICONST_1,
67      * ICONST_2, ICONST_3, ICONST_4, ICONST_5, LCONST_0, LCONST_1,
68      * FCONST_0, FCONST_1, FCONST_2, DCONST_0, DCONST_1, IALOAD, LALOAD,
69      * FALOAD, DALOAD, AALOAD, BALOAD, CALOAD, SALOAD, IASTORE, LASTORE,
70      * FASTORE, DASTORE, AASTORE, BASTORE, CASTORE, SASTORE, POP, POP2,
71      * DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, SWAP, IADD, LADD,
72      * FADD, DADD, ISUB, LSUB, FSUB, DSUB, IMUL, LMUL, FMUL, DMUL, IDIV,
73      * LDIV, FDIV, DDIV, IREM, LREM, FREM, DREM, INEG, LNEG, FNEG, DNEG,
74      * ISHL, LSHL, ISHR, LSHR, IUSHR, LUSHR, IAND, LAND, IOR, LOR, IXOR,
75      * LXOR, I2L, I2F, I2D, L2I, L2F, L2D, F2I, F2L, F2D, D2I, D2L, D2F,
76      * I2B, I2C, I2S, LCMP, FCMPL, FCMPG, DCMPL, DCMPG, IRETURN, LRETURN,
77      * FRETURN, DRETURN, ARETURN, RETURN, ARRAYLENGTH, ATHROW,
78      * MONITORENTER, or MONITOREXIT.
79      */
80     public InsnNode(final int opcode) {
81         super(opcode);
82     }
83
84     /**
85      * Makes the given visitor visit this instruction.
86      *
87      * @param mv a method visitor.
88      */
89     public void accept(final MethodVisitor mv) {
90         mv.visitInsn(opcode);
91     }
92
93     public int getType() {
94         return INSN;
95     }
96 }
97
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