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Java > Open Source Codes > net > jforum > repository > ModulesRepository


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 29/11/2004 22:53:28
40  * The JForum Project
41  * http://www.jforum.net
42  */
43 package net.jforum.repository;
44
45 import java.io.IOException JavaDoc;
46 import java.util.HashMap JavaDoc;
47 import java.util.Map JavaDoc;
48 import java.util.Properties JavaDoc;
49
50 import net.jforum.ConfigLoader;
51 import net.jforum.JForumExecutionContext;
52
53 import org.apache.log4j.Logger;
54
55 /**
56  * @author Rafael Steil
57  * @version $Id: ModulesRepository.java,v 1.9 2006/01/29 15:07:18 rafaelsteil Exp $
58  */
59 public class ModulesRepository
60 {
61     private static final Logger logger = Logger.getLogger(ModulesRepository.class);
62     
63     private static Map JavaDoc cache = new HashMap JavaDoc();
64     private static final String JavaDoc ENTRIES = "entries";
65
66     /**
67      * Loads all modules mapping.
68      *
69      * @param baseDir The directory where the file "modulesMapping.properties"
70      * is placed.
71      * @throws IOException
72      */
73     public static void init(String JavaDoc baseDir) throws IOException JavaDoc
74     {
75         cache.put(ENTRIES, ConfigLoader.loadModulesMapping(baseDir));
76     }
77     
78     public static int size()
79     {
80         return cache.size();
81     }
82     
83     /**
84      * Gets the fully qualified name of some given module name.
85      *
86      * @param moduleName The module's name to get its class name
87      * @return The class name associated to the module name passed
88      * as argument, or <code>null</code> if not found.
89      */
90     public static String JavaDoc getModuleClass(String JavaDoc moduleName) {
91         Properties JavaDoc p = (Properties JavaDoc)cache.get(ENTRIES);
92         
93         if (p == null) {
94             logger.error("Null modules. Askes moduleName: " + moduleName
95                     + ", url=" + JForumExecutionContext.getRequest().getQueryString());
96             return null;
97         }
98         
99         return p.getProperty(moduleName);
100     }
101 }
102
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