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Java > Open Source Codes > org > objectweb > perseus > cache > lib > BasicReplaceableCacheEntry


1 /**
2  * Copyright (C) 2001-2002
3  * - France Telecom R&D
4  * - Laboratoire Logiciels, Systemes, Reseaux - UMR 5526, CNRS-INPG-UJF
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  * Release: 1.0
21  *
22  * Authors:
23  *
24  */
25
26 package org.objectweb.perseus.cache.lib;
27
28 import org.objectweb.perseus.cache.api.UnFixProtocolException;
29 import org.objectweb.perseus.cache.replacement.api.ReplaceableCacheEntry;
30
31 /**
32  * This class is a simple implementation of the ReplaceableCacheEntry interface.
33  *
34  * @author S.Chassande-Barrioz, E.Bruneton
35  */
36 public class BasicReplaceableCacheEntry implements ReplaceableCacheEntry {
37
38     Object JavaDoc o;
39     Object JavaDoc id;
40     int users;
41   long age;
42
43     public BasicReplaceableCacheEntry(Object JavaDoc id, Object JavaDoc o) {
44         this.o = o;
45         this.id = id;
46     }
47
48
49     //IMPLEMENTATION OF THE CacheEntry INTERFACE //
50 //-------------------------------------------//
51
52     public Object JavaDoc getCeObject() {
53         return o;
54     }
55
56     public Object JavaDoc getCeIdentifier() {
57         return id;
58     }
59
60
61     //IMPLEMENTATION OF THE FixableCacheEntry INTERFACE //
62 //--------------------------------------------------//
63
64     public void fixCe() {
65         users++;
66     }
67
68     public void unfixCe() throws UnFixProtocolException {
69         if (users == 0) {
70       throw new UnFixProtocolException();
71     }
72     users--;
73     }
74
75     public int getCeFixCount() {
76         return users;
77     }
78
79   //IMPLEMENTATION OF THE ReplaceableCacheEntry INTERFACE //
80 //------------------------------------------------------//
81
82   public long getCeAge () {
83     return age;
84   }
85
86   public void setCeAge (long age) {
87     this.age = age;
88   }
89 }
90
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