/***
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000,2002,2003 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 oracle.toplink.libraries.asm.tree;

import oracle.toplink.libraries.asm.CodeVisitor;

/**
 * A node that represents a local variable instruction. A local variable
 * instruction is an instruction that loads or stores the value of a local
 * variable.
 * 
 * @author Eric Bruneton
 */

public class VarInsnNode extends AbstractInsnNode {

  /**
   * The operand of this instruction. This operand is the index of a local
   * variable.
   */

  public int var;

  /**
   * Visits a local variable instruction. A local variable instruction is an
   * instruction that loads or stores the value of a local variable.
   *
   * @param opcode the opcode of the local variable instruction to be
   *      constructed. This opcode must be ILOAD, LLOAD, FLOAD, DLOAD, ALOAD,
   *      ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
   * @param var the operand of the instruction to be constructed. This operand
   *      is the index of a local variable.
   */

  public VarInsnNode (final int opcode, final int var) {
    super(opcode);
    this.var = var;
  }

  /**
   * Sets the opcode of this instruction.
   *
   * @param opcode the new instruction opcode. This opcode must be ILOAD, LLOAD,
   *      FLOAD, DLOAD, ALOAD, ISTORE, LSTORE, FSTORE, DSTORE, ASTORE or RET.
   */

  public void setOpcode (final int opcode) {
    this.opcode = opcode;
  }

  public void accept (final CodeVisitor cv) {
    cv.visitVarInsn(opcode, var);
  }
}
