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Java > Open Source Codes > net > jforum > cache > DefaultCacheEngine


1 /*
2  * Copyright (c)Rafael Steil
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms,
6  * with or without modification, are permitted provided
7  * that the following conditions are met:
8  *
9  * 1) Redistributions of source code must retain the above
10  * copyright notice, this list of conditions and the
11  * following disclaimer.
12  * 2) Redistributions in binary form must reproduce the
13  * above copyright notice, this list of conditions and
14  * the following disclaimer in the documentation and/or
15  * other materials provided with the distribution.
16  * 3) Neither the name of "Rafael Steil" nor
17  * the names of its contributors may be used to endorse
18  * or promote products derived from this software without
19  * specific prior written permission.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT
22  * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
23  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
24  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
27  * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
32  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
33  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
34  * IN CONTRACT, STRICT LIABILITY, OR TORT
35  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
36  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
37  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
38  *
39  * Created on Feb 1, 2005 7:30:35 PM
40  * The JForum Project
41  * http://www.jforum.net
42  */
43 package net.jforum.cache;
44
45 import java.util.ArrayList JavaDoc;
46 import java.util.Collection JavaDoc;
47 import java.util.HashMap JavaDoc;
48 import java.util.Map JavaDoc;
49
50 /**
51  * @author Rafael Steil
52  * @version $Id: DefaultCacheEngine.java,v 1.9 2005/09/25 02:40:28 rafaelsteil Exp $
53  */
54 public class DefaultCacheEngine implements CacheEngine
55 {
56     private Map JavaDoc cache = new HashMap JavaDoc();
57     
58     /**
59      * @see net.jforum.cache.CacheEngine#add(java.lang.String, java.lang.Object)
60      */
61     public void add(String JavaDoc key, Object JavaDoc value)
62     {
63         this.cache.put(key, value);
64     }
65     
66     /**
67      * @see net.jforum.cache.CacheEngine#add(java.lang.String, java.lang.String, java.lang.Object)
68      */
69     public void add(String JavaDoc fqn, String JavaDoc key, Object JavaDoc value)
70     {
71         Map JavaDoc m = (Map JavaDoc)this.cache.get(fqn);
72         if (m == null) {
73             m = new HashMap JavaDoc();
74         }
75
76         m.put(key, value);
77         this.cache.put(fqn, m);
78     }
79     
80     /**
81      * @see net.jforum.cache.CacheEngine#get(java.lang.String, java.lang.String)
82      */
83     public Object JavaDoc get(String JavaDoc fqn, String JavaDoc key)
84     {
85         Map JavaDoc m = (Map JavaDoc)this.cache.get(fqn);
86         if (m == null) {
87             return null;
88         }
89         
90         return m.get(key);
91     }
92     
93     /**
94      * @see net.jforum.cache.CacheEngine#get(java.lang.String)
95      */
96     public Object JavaDoc get(String JavaDoc fqn)
97     {
98         return this.cache.get(fqn);
99     }
100     
101     /**
102      * @see net.jforum.cache.CacheEngine#getValues(java.lang.String)
103      */
104     public Collection JavaDoc getValues(String JavaDoc fqn)
105     {
106         Map JavaDoc m = (Map JavaDoc)this.cache.get(fqn);
107         if (m == null) {
108             return new ArrayList JavaDoc();
109         }
110         
111         return m.values();
112     }
113     
114     /**
115      * @see net.jforum.cache.CacheEngine#init()
116      */
117     public void init()
118     {
119         this.cache = new HashMap JavaDoc();
120     }
121     
122     /**
123      * @see net.jforum.cache.CacheEngine#stop()
124      */
125     public void stop() {}
126     
127     /**
128      * @see net.jforum.cache.CacheEngine#remove(java.lang.String, java.lang.String)
129      */
130     public void remove(String JavaDoc fqn, String JavaDoc key)
131     {
132         Map JavaDoc m = (Map JavaDoc)this.cache.get(fqn);
133         if (m != null) {
134             m.remove(key);
135         }
136     }
137     
138     /**
139      * @see net.jforum.cache.CacheEngine#remove(java.lang.String)
140      */
141     public void remove(String JavaDoc fqn)
142     {
143         this.cache.remove(fqn);
144     }
145 }
146
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