org.objectweb.asm.tree.JumpInsnNode.java Source code

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Here is the source code for org.objectweb.asm.tree.JumpInsnNode.java

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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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package org.objectweb.asm.tree;

import java.util.Map;
import org.objectweb.asm.MethodVisitor;

/**
 * A node that represents a jump instruction. A jump instruction is an instruction that may jump to
 * another instruction.
 *
 * @author Eric Bruneton
 */
public class JumpInsnNode extends AbstractInsnNode {

    /**
     * The operand of this instruction. This operand is a label that designates the instruction to
     * which this instruction may jump.
     */
    public LabelNode label;

    /**
     * Constructs a new {@link JumpInsnNode}.
     *
     * @param opcode the opcode of the type instruction to be constructed. This opcode must be IFEQ,
     *     IFNE, IFLT, IFGE, IFGT, IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT,
     *     IF_ICMPLE, IF_ACMPEQ, IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
     * @param label the operand of the instruction to be constructed. This operand is a label that
     *     designates the instruction to which the jump instruction may jump.
     */
    public JumpInsnNode(final int opcode, final LabelNode label) {
        super(opcode);
        this.label = label;
    }

    /**
     * Sets the opcode of this instruction.
     *
     * @param opcode the new instruction opcode. This opcode must be IFEQ, IFNE, IFLT, IFGE, IFGT,
     *     IFLE, IF_ICMPEQ, IF_ICMPNE, IF_ICMPLT, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ACMPEQ,
     *     IF_ACMPNE, GOTO, JSR, IFNULL or IFNONNULL.
     */
    public void setOpcode(final int opcode) {
        this.opcode = opcode;
    }

    @Override
    public int getType() {
        return JUMP_INSN;
    }

    @Override
    public void accept(final MethodVisitor methodVisitor) {
        methodVisitor.visitJumpInsn(opcode, label.getLabel());
        acceptAnnotations(methodVisitor);
    }

    @Override
    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
        return new JumpInsnNode(opcode, clone(label, clonedLabels)).cloneAnnotations(this);
    }
}