View Javadoc
1   /*
2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   /*
6    * Copyright 2001-2004 The Apache Software Foundation.
7    *
8    * Licensed under the Apache License, Version 2.0 (the "License");
9    * you may not use this file except in compliance with the License.
10   * You may obtain a copy of the License at
11   *
12   *     http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing, software
15   * distributed under the License is distributed on an "AS IS" BASIS,
16   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17   * See the License for the specific language governing permissions and
18   * limitations under the License.
19   */
20  /*
21   * $Id: MultiHashtable.java,v 1.2.4.1 2005/09/05 11:18:51 pvedula Exp $
22   */
23  
24  package com.sun.org.apache.xalan.internal.xsltc.compiler.util;
25  
26  import java.util.Hashtable;
27  import java.util.Vector;
28  
29  /**
30   * @author Jacek Ambroziak
31   * @author Santiago Pericas-Geertsen
32   */
33  public final class MultiHashtable extends Hashtable {
34      static final long serialVersionUID = -6151608290510033572L;
35      public Object put(Object key, Object value) {
36          Vector vector = (Vector)get(key);
37          if (vector == null)
38              super.put(key, vector = new Vector());
39          vector.add(value);
40          return vector;
41      }
42  
43      public Object maps(Object from, Object to) {
44          if (from == null) return null;
45          final Vector vector = (Vector) get(from);
46          if (vector != null) {
47              final int n = vector.size();
48              for (int i = 0; i < n; i++) {
49                  final Object item = vector.elementAt(i);
50                  if (item.equals(to)) {
51                      return item;
52                  }
53              }
54          }
55          return null;
56      }
57  }