// 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
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package org.apache.tapestry5.internal.plastic.asm.tree;

import java.util.Map;

import org.apache.tapestry5.internal.plastic.asm.MethodVisitor;

/**
 * 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
   * org.apache.tapestry5.internal.plastic.asm.Type#getInternalName}).
   */
  public String owner;

  /** The field's name. */
  public String name;

  /** The field's descriptor (see {@link org.apache.tapestry5.internal.plastic.asm.Type}). */
  public String desc;

  /**
   * Constructs a new {@link FieldInsnNode}.
   *
   * @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
   *     org.apache.tapestry5.internal.plastic.asm.Type#getInternalName}).
   * @param name the field's name.
   * @param descriptor the field's descriptor (see {@link org.apache.tapestry5.internal.plastic.asm.Type}).
   */
  public FieldInsnNode(
      final int opcode, final String owner, final String name, final String descriptor) {
    super(opcode);
    this.owner = owner;
    this.name = name;
    this.desc = descriptor;
  }

  /**
   * 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;
  }

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

  @Override
  public void accept(final MethodVisitor methodVisitor) {
    methodVisitor.visitFieldInsn(opcode, owner, name, desc);
    acceptAnnotations(methodVisitor);
  }

  @Override
  public AbstractInsnNode clone(final Map<LabelNode, LabelNode> clonedLabels) {
    return new FieldInsnNode(opcode, owner, name, desc).cloneAnnotations(this);
  }
}
