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Java > Open Source Codes > com > sun > org > apache > bcel > internal > util > ClassSet


1 package com.sun.org.apache.bcel.internal.util;
2
3 /* ====================================================================
4  * The Apache Software License, Version 1.1
5  *
6  * Copyright (c) 2001 The Apache Software Foundation. All rights
7  * reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  *
13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
15  *
16  * 2. Redistributions in binary form must reproduce the above copyright
17  * notice, this list of conditions and the following disclaimer in
18  * the documentation and/or other materials provided with the
19  * distribution.
20  *
21  * 3. The end-user documentation included with the redistribution,
22  * if any, must include the following acknowledgment:
23  * "This product includes software developed by the
24  * Apache Software Foundation (http://www.apache.org/)."
25  * Alternately, this acknowledgment may appear in the software itself,
26  * if and wherever such third-party acknowledgments normally appear.
27  *
28  * 4. The names "Apache" and "Apache Software Foundation" and
29  * "Apache BCEL" must not be used to endorse or promote products
30  * derived from this software without prior written permission. For
31  * written permission, please contact apache@apache.org.
32  *
33  * 5. Products derived from this software may not be called "Apache",
34  * "Apache BCEL", nor may "Apache" appear in their name, without
35  * prior written permission of the Apache Software Foundation.
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37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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41  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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44  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48  * SUCH DAMAGE.
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50  *
51  * This software consists of voluntary contributions made by many
52  * individuals on behalf of the Apache Software Foundation. For more
53  * information on the Apache Software Foundation, please see
54  * <http://www.apache.org/>.
55  */
56 import java.util.HashMap JavaDoc;
57 import java.util.Collection JavaDoc;
58 import com.sun.org.apache.bcel.internal.classfile.JavaClass;
59
60 /**
61  * Utility class implementing a (typesafe) set of JavaClass objects.
62  * Since JavaClass has no equals() method, the name of the class is
63  * used for comparison.
64  *
65  * @version $Id: ClassSet.java,v 1.1.2.1 2005/07/31 23:47:02 jeffsuttor Exp $
66  * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
67  * @see ClassStack
68 */
69 public class ClassSet implements java.io.Serializable JavaDoc {
70   private HashMap JavaDoc _map = new HashMap JavaDoc();
71
72   public boolean add(JavaClass clazz) {
73     boolean result = false;
74
75     if(!_map.containsKey(clazz.getClassName())) {
76       result = true;
77       _map.put(clazz.getClassName(), clazz);
78     }
79
80     return result;
81   }
82
83   public void remove(JavaClass clazz) { _map.remove(clazz.getClassName()); }
84   public boolean empty() { return _map.isEmpty(); }
85
86   public JavaClass[] toArray() {
87     Collection JavaDoc values = _map.values();
88     JavaClass[] classes = new JavaClass[values.size()];
89     values.toArray(classes);
90     return classes;
91   }
92
93   public String JavaDoc[] getClassNames() {
94     return (String JavaDoc[])_map.keySet().toArray(new String JavaDoc[_map.keySet().size()]);
95   }
96 }
97
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