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Java > Open Source Codes > org > apache > hivemind > util > ClasspathResource


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.util;
16
17 import java.net.URL JavaDoc;
18 import java.util.Locale JavaDoc;
19
20 import org.apache.hivemind.ClassResolver;
21 import org.apache.hivemind.Resource;
22
23 /**
24  * Implementation of {@link org.apache.hivemind.Resource}
25  * for resources found within the classpath.
26  *
27  *
28  * @author Howard Lewis Ship
29  */
30
31 public class ClasspathResource extends AbstractResource
32 {
33     private ClassResolver _resolver;
34
35     public ClasspathResource(ClassResolver resolver, String JavaDoc path)
36     {
37         this(resolver, path, null);
38     }
39
40     public ClasspathResource(ClassResolver resolver, String JavaDoc path, Locale JavaDoc locale)
41     {
42         super(path, locale);
43
44         _resolver = resolver;
45     }
46
47     /**
48      * Locates the localization of the
49      * resource using {@link LocalizedResourceFinder}.
50      */
51
52     public Resource getLocalization(Locale JavaDoc locale)
53     {
54         String JavaDoc path = getPath();
55         LocalizedResourceFinder finder = new LocalizedResourceFinder(_resolver);
56
57         LocalizedResource localizedResource = finder.resolve(path, locale);
58
59         if (localizedResource == null)
60             return null;
61
62         String JavaDoc localizedPath = localizedResource.getResourcePath();
63         Locale JavaDoc pathLocale = localizedResource.getResourceLocale();
64
65         if (localizedPath == null)
66             return null;
67
68         if (path.equals(localizedPath))
69             return this;
70
71         return new ClasspathResource(_resolver, localizedPath, pathLocale);
72     }
73
74     /**
75      * Invokes {@link ClassResolver#getResource(String)} with the path.
76      */
77
78     public URL JavaDoc getResourceURL()
79     {
80         return _resolver.getResource(getPath());
81     }
82
83     public String JavaDoc toString()
84     {
85         return "classpath:" + getPath();
86     }
87
88     public int hashCode()
89     {
90         return 4783 & getPath().hashCode();
91     }
92
93     protected Resource newResource(String JavaDoc path)
94     {
95         return new ClasspathResource(_resolver, path);
96     }
97
98 }
99
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