1   package org.apache.bcel.generic;
2   import org.apache.bcel.Constants;
3   
4   /* ====================================================================
5    * The Apache Software License, Version 1.1
6    *
7    * Copyright (c) 2001 The Apache Software Foundation.  All rights
8    * reserved.
9    *
10   * Redistribution and use in source and binary forms, with or without
11   * modification, are permitted provided that the following conditions
12   * are met:
13   *
14   * 1. Redistributions of source code must retain the above copyright
15   *    notice, this list of conditions and the following disclaimer.
16   *
17   * 2. Redistributions in binary form must reproduce the above copyright
18   *    notice, this list of conditions and the following disclaimer in
19   *    the documentation and/or other materials provided with the
20   *    distribution.
21   *
22   * 3. The end-user documentation included with the redistribution,
23   *    if any, must include the following acknowledgment:
24   *       "This product includes software developed by the
25   *        Apache Software Foundation (http://www.apache.org/)."
26   *    Alternately, this acknowledgment may appear in the software itself,
27   *    if and wherever such third-party acknowledgments normally appear.
28   *
29   * 4. The names "Apache" and "Apache Software Foundation" and
30   *    "Apache BCEL" must not be used to endorse or promote products
31   *    derived from this software without prior written permission. For
32   *    written permission, please contact apache@apache.org.
33   *
34   * 5. Products derived from this software may not be called "Apache",
35   *    "Apache BCEL", nor may "Apache" appear in their name, without
36   *    prior written permission of the Apache Software Foundation.
37   *
38   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
39   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
41   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
42   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
43   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
44   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
45   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
46   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
47   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
48   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
49   * SUCH DAMAGE.
50   * ====================================================================
51   *
52   * This software consists of voluntary contributions made by many
53   * individuals on behalf of the Apache Software Foundation.  For more
54   * information on the Apache Software Foundation, please see
55   * <http://www.apache.org/>.
56   */
57  
58  import org.apache.bcel.classfile.*;
59  import java.util.ArrayList;
60  
61  /***
62   * Super class for FieldGen and MethodGen objects, since they have
63   * some methods in common!
64   *
65   * @version $Id: FieldGenOrMethodGen.java,v 1.2 2002/04/24 08:01:36 mdahm Exp $
66   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
67   */
68  public abstract class FieldGenOrMethodGen extends AccessFlags
69    implements NamedAndTyped, Cloneable
70  {
71    protected String          name;
72    protected Type            type;
73    protected ConstantPoolGen cp;
74    private   ArrayList       attribute_vec = new ArrayList();
75  
76    protected FieldGenOrMethodGen() {}
77  
78    public void            setType(Type type)   {
79      if(type.getType() == Constants.T_ADDRESS)
80        throw new IllegalArgumentException("Type can not be " + type);
81  
82      this.type = type;
83    }
84    public Type            getType()            { return type; }
85  
86    /*** @return name of method/field.
87     */
88    public String          getName()            { return name; }
89    public void            setName(String name) { this.name = name; }
90  
91    public ConstantPoolGen getConstantPool()                   { return cp; }
92    public void            setConstantPool(ConstantPoolGen cp) { this.cp = cp; }    
93  
94    /***
95     * Add an attribute to this method. Currently, the JVM knows about
96     * the `Code', `ConstantValue', `Synthetic' and `Exceptions'
97     * attributes. Other attributes will be ignored by the JVM but do no
98     * harm.
99     *
100    * @param a attribute to be added
101    */
102   public void addAttribute(Attribute a) { attribute_vec.add(a); }
103 
104   /***
105    * Remove an attribute.
106    */
107   public void removeAttribute(Attribute a) { attribute_vec.remove(a); }
108 
109   /***
110    * Remove all attributes.
111    */
112   public void removeAttributes() { attribute_vec.clear(); }
113    
114   /***
115    * @return all attributes of this method.
116    */
117   public Attribute[] getAttributes() {
118     Attribute[] attributes = new Attribute[attribute_vec.size()];
119     attribute_vec.toArray(attributes);
120     return attributes;
121   }
122 
123   /*** @return signature of method/field.
124    */
125   public abstract String  getSignature();
126 
127   public Object clone() {
128     try {
129       return super.clone();
130     } catch(CloneNotSupportedException e) {
131       System.err.println(e);
132       return null;
133     }
134   }
135 }
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