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Java > Open Source Codes > freemarker > cache > URLTemplateSource


1 /*
2  * Copyright (c) 2003 The Visigoth Software Society. All rights
3  * reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  *
9  * 1. Redistributions of source code must retain the above copyright
10  * notice, this list of conditions and the following disclaimer.
11  *
12  * 2. Redistributions in binary form must reproduce the above copyright
13  * notice, this list of conditions and the following disclaimer in
14  * the documentation and/or other materials provided with the
15  * distribution.
16  *
17  * 3. The end-user documentation included with the redistribution, if
18  * any, must include the following acknowledgement:
19  * "This product includes software developed by the
20  * Visigoth Software Society (http://www.visigoths.org/)."
21  * Alternately, this acknowledgement may appear in the software itself,
22  * if and wherever such third-party acknowledgements normally appear.
23  *
24  * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
25  * project contributors may be used to endorse or promote products derived
26  * from this software without prior written permission. For written
27  * permission, please contact visigoths@visigoths.org.
28  *
29  * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
30  * nor may "FreeMarker" or "Visigoth" appear in their names
31  * without prior written permission of the Visigoth Software Society.
32  *
33  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
34  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
35  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
36  * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
37  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
38  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
39  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
40  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
41  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
42  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
43  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44  * SUCH DAMAGE.
45  * ====================================================================
46  *
47  * This software consists of voluntary contributions made by many
48  * individuals on behalf of the Visigoth Software Society. For more
49  * information on the Visigoth Software Society, please see
50  * http://www.visigoths.org/
51  */

52
53 package freemarker.cache;
54
55 import java.io.File JavaDoc;
56 import java.io.IOException JavaDoc;
57 import java.io.InputStream JavaDoc;
58 import java.net.URL JavaDoc;
59 import java.net.URLConnection JavaDoc;
60
61 /**
62  * Wraps a <code>java.net.URL</code>, and implements methods required for a typical template source.
63  * @version $Id: URLTemplateSource.java,v 1.4 2003/04/02 11:43:18 szegedia Exp $
64  * @author Daniel Dékány
65  */

66 class URLTemplateSource {
67     private final URL JavaDoc url;
68     private URLConnection JavaDoc conn;
69     private InputStream JavaDoc inputStream;
70
71     URLTemplateSource(URL JavaDoc url) throws IOException JavaDoc {
72         this.url = url;
73         this.conn = url.openConnection();
74     }
75
76     public boolean equals(Object JavaDoc o) {
77         if (o instanceof URLTemplateSource) {
78             return url.equals(((URLTemplateSource) o).url);
79         } else {
80             return false;
81         }
82     }
83
84     public int hashCode() {
85         return url.hashCode();
86     }
87
88     public String JavaDoc toString() {
89         return url.toString();
90     }
91     
92     long lastModified() {
93         long lastModified = conn.getLastModified();
94         if (lastModified == -1L && url.getProtocol().equals("file")) {
95             // Hack for obtaining accurate last modified time for
96
// URLs that point to the local file system. This is fixed
97
// in JDK 1.4, but prior JDKs returns -1 for file:// URLs.
98
return new File JavaDoc(url.getFile()).lastModified();
99         } else {
100             return lastModified;
101         }
102     }
103
104     InputStream JavaDoc getInputStream() throws IOException JavaDoc {
105         inputStream = conn.getInputStream();
106         return inputStream;
107     }
108
109     void close() throws IOException JavaDoc {
110         try {
111           if (inputStream != null) {
112               inputStream.close();
113           }
114         } finally {
115           inputStream = null;
116           conn = null;
117         }
118     }
119 }
120
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