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/***
 * 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 field instruction. A field instruction is an
 * instruction that loads or stores the value of a field of an object.
 * 
 * @author Eric Bruneton
 */

public class FieldInsnNode extends AbstractInsnNode {

  /**
   * The internal name of the field's owner class (see {@link
   * oracle.toplink.libraries.asm.Type#getInternalName() getInternalName}).
   */

  public String owner;

  /**
   * The field's name.
   */

  public String name;

  /**
   * The field's descriptor (see {@link oracle.toplink.libraries.asm.Type Type}).
   */

  public String desc;

  /**
   * Constructs a new {@link FieldInsnNode FieldInsnNode} object.
   *
   * @param opcode the opcode of the type instruction to be constructed. This
   *      opcode must be GETSTATIC, PUTSTATIC, GETFIELD or PUTFIELD.
   * @param owner the internal name of the field's owner class (see {@link
   *      oracle.toplink.libraries.asm.Type#getInternalName() getInternalName}).
   * @param name the field's name.
   * @param desc the field's descriptor (see {@link oracle.toplink.libraries.asm.Type
   *      Type}).
   */

  public FieldInsnNode (
    final int opcode,
    final String owner,
    final String name,
    final String desc)
  {
    super(opcode);
    this.owner = owner;
    this.name = name;
    this.desc = desc;
  }

  /**
   * Sets the opcode of this instruction.
   *
   * @param opcode the new instruction opcode. This opcode must be GETSTATIC,
   *      PUTSTATIC, GETFIELD or PUTFIELD.
   */

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

  public void accept (final CodeVisitor cv) {
    cv.visitFieldInsn(opcode, owner, name, desc);
  }
}