/***
 * 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
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.objectweb.asm.tree;

import java.util.Map;

import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

/**
 * 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;

  public JumpInsnNode() {
    super(Opcodes.GOTO);
  }

  /**
   * 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 mv) {
    mv.visitJumpInsn(opcode, label.getLabel());
    acceptAnnotations(mv);
  }

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