1/*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.  Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25/*
26 * This file is available under and governed by the GNU General Public
27 * License version 2 only, as published by the Free Software Foundation.
28 * However, the following notice accompanied the original version of this
29 * file:
30 *
31 * ASM: a very small and fast Java bytecode manipulation framework
32 * Copyright (c) 2000-2011 INRIA, France Telecom
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 *    notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 *    notice, this list of conditions and the following disclaimer in the
42 *    documentation and/or other materials provided with the distribution.
43 * 3. Neither the name of the copyright holders nor the names of its
44 *    contributors may be used to endorse or promote products derived from
45 *    this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
48 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
51 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
57 * THE POSSIBILITY OF SUCH DAMAGE.
58 */
59package jdk.internal.org.objectweb.asm.tree;
60
61import java.util.Map;
62
63import jdk.internal.org.objectweb.asm.MethodVisitor;
64
65/**
66 * A node that represents a local variable instruction. A local variable
67 * instruction is an instruction that loads or stores the value of a local
68 * variable.
69 *
70 * @author Eric Bruneton
71 */
72public class VarInsnNode extends AbstractInsnNode {
73
74    /**
75     * The operand of this instruction. This operand is the index of a local
76     * variable.
77     */
78    public int var;
79
80    /**
81     * Constructs a new {@link VarInsnNode}.
82     *
83     * @param opcode
84     *            the opcode of the local variable instruction to be
85     *            constructed. This opcode must be ILOAD, LLOAD, FLOAD, DLOAD,
86     *            ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
87     * @param var
88     *            the operand of the instruction to be constructed. This operand
89     *            is the index of a local variable.
90     */
91    public VarInsnNode(final int opcode, final int var) {
92        super(opcode);
93        this.var = var;
94    }
95
96    /**
97     * Sets the opcode of this instruction.
98     *
99     * @param opcode
100     *            the new instruction opcode. This opcode must be ILOAD, LLOAD,
101     *            FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or
102     *            RET.
103     */
104    public void setOpcode(final int opcode) {
105        this.opcode = opcode;
106    }
107
108    @Override
109    public int getType() {
110        return VAR_INSN;
111    }
112
113    @Override
114    public void accept(final MethodVisitor mv) {
115        mv.visitVarInsn(opcode, var);
116        acceptAnnotations(mv);
117    }
118
119    @Override
120    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> labels) {
121        return new VarInsnNode(opcode, var).cloneAnnotations(this);
122    }
123}
124