fieldgenormethodgen.java

该开源工具主要用于class文件的操作

package org.apache.bcel.generic;

/* ====================================================================
 * 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
 *    notice, this list of conditions and the following disclaimer in
 *    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",
 *    "Apache BCEL", nor may "Apache" appear in their name, without
 *    prior written permission of the Apache Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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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.classfile.*;
import java.util.ArrayList;

/**
 * Super class for FieldGen and MethodGen objects, since they have
 * some methods in common!
 *
 * @version $Id: FieldGenOrMethodGen.java,v 1.1.1.1 2001/10/29 20:00:12 jvanzyl Exp $
 * @author  <A HREF="mailto:[e-mail]">M. Dahm</A>
 */
public abstract class FieldGenOrMethodGen extends AccessFlags
  implements NamedAndTyped, Cloneable
{
  protected String          name;
  protected Type            type;
  protected ConstantPoolGen cp;
  private   ArrayList       attribute_vec = new ArrayList();

  protected FieldGenOrMethodGen() {}

  public void            setType(Type type)   { this.type = type; }
  public Type            getType()            { return type; }

  /** @return name of method/field.
   */
  public String          getName()            { return name; }
  public void            setName(String name) { this.name = name; }

  public ConstantPoolGen getConstantPool()                   { return cp; }
  public void            setConstantPool(ConstantPoolGen cp) { this.cp = cp; }    

  /**
   * Add an attribute to this method. Currently, the JVM knows about
   * the `Code', `ConstantValue', `Synthetic' and `Exceptions'
   * attributes. Other attributes will be ignored by the JVM but do no
   * harm.
   *
   * @param a attribute to be added
   */
  public void addAttribute(Attribute a) { attribute_vec.add(a); }

  /**
   * Remove an attribute.
   */
  public void removeAttribute(Attribute a) { attribute_vec.remove(a); }

  /**
   * Remove all attributes.
   */
  public void removeAttributes() { attribute_vec.clear(); }
   
  /**
   * @return all attributes of this method.
   */
  public Attribute[] getAttributes() {
    Attribute[] attributes = new Attribute[attribute_vec.size()];
    attribute_vec.toArray(attributes);
    return attributes;
  }

  /** @return signature of method/field.
   */
  public abstract String  getSignature();

  public Object clone() {
    try {
      return super.clone();
    } catch(CloneNotSupportedException e) {
      System.err.println(e);
      return null;
    }
  }
}