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Java > Open Source Codes > examples > invoice > applications > TrivialCache


1 /**
2  * JORM: an implementation of a generic mapping system for persistent Java
3  * objects. Two mapping are supported: to RDBMS and to binary files.
4  * Copyright (C) 2001-2003 France Telecom R&D - INRIA
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2 of the License, or (at your option) any later version.
10  *
11  * This library is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with this library; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19  *
20  * Contact: jorm-team@objectweb.org
21  *
22  */
23
24 package examples.invoice.applications;
25
26 import org.objectweb.perseus.cache.api.CacheManager;
27 import org.objectweb.perseus.cache.api.CacheEntry;
28 import org.objectweb.perseus.cache.api.CacheException;
29
30 import java.util.HashMap JavaDoc;
31
32 /**
33  * @author P. Dechamboux
34  */
35 public class TrivialCache implements CacheManager {
36     private HashMap JavaDoc cache = new HashMap JavaDoc();
37
38     public synchronized CacheEntry bind(Object JavaDoc id, Object JavaDoc entry) throws CacheException {
39         CacheEntry ce = (CacheEntry) cache.get(id);
40         if (ce == null) {
41             ce = new TrivialCacheEntry(id, entry);
42             cache.put(id, ce);
43         }
44         return ce;
45     }
46
47     public synchronized CacheEntry lookup(Object JavaDoc id) {
48         return (CacheEntry) cache.get(id);
49     }
50
51     public void fix(CacheEntry cacheEntry) throws CacheException {
52     }
53
54     public void unfix(CacheEntry cacheEntry) throws CacheException {
55     }
56
57     public void touch(CacheEntry cacheEntry) throws CacheException {
58     }
59 }
60
61 class TrivialCacheEntry implements CacheEntry {
62     private Object JavaDoc id;
63     private Object JavaDoc entry;
64
65     public TrivialCacheEntry(Object JavaDoc i, Object JavaDoc e) {
66         id = i;
67         entry = e;
68     }
69
70     public Object JavaDoc getCeObject() {
71         return null;
72     }
73
74     public Object JavaDoc getCeIdentifier() {
75         return null;
76     }
77 }
78
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