constantfieldref.java

该开源工具主要用于class文件的操作

package org.apache.bcel.classfile;

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2001 The Apache Software Foundation.  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
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 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache BCEL" must not be used to endorse or promote products
 *    derived from this software without prior written permission. For
 *    written permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache",
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

import org.apache.bcel.Constants;
import java.io.*;

/** 
 * This class represents a constant pool reference to a field.
 *
 * @version $Id: ConstantFieldref.java,v 1.1.1.1 2001/10/29 19:59:58 jvanzyl Exp $
 * @author  <A HREF="mailto:[e-mail]">M. Dahm</A>
 */
public final class ConstantFieldref extends ConstantCP {
  /**
   * Initialize from another object.
   */
  public ConstantFieldref(ConstantFieldref c) {
    super(Constants.CONSTANT_Fieldref, c.getClassIndex(), c.getNameAndTypeIndex());
  }

  /**
   * Initialize instance from file data.
   *
   * @param file input stream
   * @throw IOException
   */
  ConstantFieldref(DataInputStream file) throws IOException
  {
    super(Constants.CONSTANT_Fieldref, file);
  }

  /**
   * @param class_index Reference to the class containing the Field
   * @param name_and_type_index and the Field signature
   */
  public ConstantFieldref(int class_index, 
			   int name_and_type_index) {
    super(Constants.CONSTANT_Fieldref, class_index, name_and_type_index);
  }    

  /**
   * Called by objects that are traversing the nodes of the tree implicitely
   * defined by the contents of a Java class. I.e., the hierarchy of Fields,
   * fields, attributes, etc. spawns a tree of objects.
   *
   * @param v Visitor object
   */
  public void accept(Visitor v) {
    v.visitConstantFieldref(this);
  }    
}