VersionMap


1   /* *****************************************************************************
2    * SWFMap.java
3    * ****************************************************************************/
4   
5   /* J_LZ_COPYRIGHT_BEGIN *******************************************************
6   * Copyright 2001-2004 Laszlo Systems, Inc.  All Rights Reserved.              *
7   * Use is subject to license terms.                                            *
8   * J_LZ_COPYRIGHT_END *********************************************************/
9   
10  package org.openlaszlo.utils;
11  import java.util.*;
12  
13  /**
14   * A Map to retrieve and store an object based on some key. For example, could
15   * be used to store different versions of the same SWF bytecode. Not
16   * thread-safe.
17   */
18  public class VersionMap {
19  
20      Map mMap = new HashMap();
21  
22      /**
23       * Put a value based on version and key.
24       */
25      public void put(Object   version, Object   key, Object   value) {
26          Map m = (Map)mMap.get(key);
27          if (m == null) {
28              m = new HashMap();
29              mMap.put(key, m);
30          }
31          m.put(version, value);
32      }
33  
34      /**
35       * Get value based on version and key.
36       */
37      public Object   get(Object   version, Object   key) {
38          Map m = (Map)mMap.get(key);
39          if (m == null) return null;
40          return m.get(version);
41      }
42  
43      /**
44       * @return set of keys.
45       */
46      public Set keySet() {
47          return mMap.keySet();
48      }
49  
50      /**
51       * @return map of versions.
52       */
53      public Map getVersions(Object   key) {
54          return (Map)mMap.get(key);
55      }
56  
57      /**
58       * @return number of items in this map.
59       */
60      public int size() {
61          return mMap.size();
62      }
63  }
64
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