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Java > Open Source Codes > org > apache > bcel > util > ClassSet


1 /*
2  * Copyright 2000-2004 The Apache Software Foundation
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *
16  */
17 package org.apache.bcel.util;
18
19 import java.util.Collection JavaDoc;
20 import java.util.HashMap JavaDoc;
21 import java.util.Map JavaDoc;
22 import org.apache.bcel.classfile.JavaClass;
23
24 /**
25  * Utility class implementing a (typesafe) set of JavaClass objects.
26  * Since JavaClass has no equals() method, the name of the class is
27  * used for comparison.
28  *
29  * @version $Id: ClassSet.java 386056 2006-03-15 11:31:56Z tcurdt $
30  * @author <A HREF="mailto:m.dahm@gmx.de">M. Dahm</A>
31  * @see ClassStack
32  */
33 public class ClassSet implements java.io.Serializable JavaDoc {
34
35     private Map JavaDoc _map = new HashMap JavaDoc();
36
37
38     public boolean add( JavaClass clazz ) {
39         boolean result = false;
40         if (!_map.containsKey(clazz.getClassName())) {
41             result = true;
42             _map.put(clazz.getClassName(), clazz);
43         }
44         return result;
45     }
46
47
48     public void remove( JavaClass clazz ) {
49         _map.remove(clazz.getClassName());
50     }
51
52
53     public boolean empty() {
54         return _map.isEmpty();
55     }
56
57
58     public JavaClass[] toArray() {
59         Collection JavaDoc values = _map.values();
60         JavaClass[] classes = new JavaClass[values.size()];
61         values.toArray(classes);
62         return classes;
63     }
64
65
66     public String JavaDoc[] getClassNames() {
67         return (String JavaDoc[]) _map.keySet().toArray(new String JavaDoc[_map.keySet().size()]);
68     }
69 }
70
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