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Java > Open Source Codes > org > jpublish > repository > RepositoryContentSource


1 /*--
2
3  Copyright (C) 2001-2003 Aetrion LLC.
4  All rights reserved.
5  
6  Redistribution and use in source and binary forms, with or without
7  modification, are permitted provided that the following conditions
8  are met:
9  
10  1. Redistributions of source code must retain the above copyright
11     notice, this list of conditions, and the following disclaimer.
12  
13  2. Redistributions in binary form must reproduce the above copyright
14     notice, this list of conditions, and the disclaimer that follows
15     these conditions in the documentation and/or other materials
16     provided with the distribution.
17
18  3. The name "JPublish" must not be used to endorse or promote products
19     derived from this software without prior written permission. For
20     written permission, please contact info@aetrion.com.
21  
22  4. Products derived from this software may not be called "JPublish", nor
23     may "JPublish" appear in their name, without prior written permission
24     from Aetrion LLC (info@aetrion.com).
25  
26  In addition, the authors of this software request (but do not require)
27  that you include in the end-user documentation provided with the
28  redistribution and/or in the software itself an acknowledgement equivalent
29  to the following:
30      "This product includes software developed by
31       Aetrion LLC (http://www.aetrion.com/)."
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 AUTHOR(S) BE LIABLE FOR ANY DIRECT,
37  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
38  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
39  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
40  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
41  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
42  IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
43  POSSIBILITY OF SUCH DAMAGE.
44
45  For more information on JPublish, please see <http://www.jpublish.org/>.
46  
47  */
48
49 package org.jpublish.repository;
50
51 import java.io.IOException JavaDoc;
52 import java.io.InputStream JavaDoc;
53 import java.io.InputStreamReader JavaDoc;
54 import java.io.Reader JavaDoc;
55
56 import org.apache.commons.logging.Log;
57 import org.apache.commons.logging.LogFactory;
58 import org.jpublish.view.ContentSource;
59
60 /**
61  * Implementation of the ContentSource interface which provides content from a Template.
62  *
63  * @author Anthony Eden
64  */
65
66 public class RepositoryContentSource implements ContentSource {
67
68     private static Log log = LogFactory.getLog(RepositoryContentSource.class);
69
70     private Repository repository = null;
71     private String JavaDoc path = null;
72
73     public RepositoryContentSource(Repository repository, String JavaDoc path) {
74         this.repository = repository;
75         this.path = path;
76     }
77
78     /**
79      * Get the last modified time for the content defined by this content source.
80      *
81      * @return The last modified time
82      * @throws IOException
83      */
84
85     public long getLastModified() throws IOException JavaDoc {
86         return repository.getLastModified(path);
87     }
88
89     /**
90      * Get an InputStream for reading the content data.
91      *
92      * @return The content InputStream
93      * @throws IOException
94      */
95
96     public InputStream JavaDoc getInputStream() throws IOException JavaDoc {
97         try {
98             if (log.isDebugEnabled()) {
99                 log.debug("getInputStream():path=" + path);
100                 log.debug("Repository class: " + repository.getClass());
101             }
102             Content content = repository.getContent(path);
103             return content.getContentInputStream();
104         } catch (Exception JavaDoc e) {
105             throw new IOException JavaDoc("Error getting stream: " + e);
106         }
107     }
108
109     /**
110      * Get a Reader for the content defined by this content source.
111      *
112      * @return A Reader
113      * @throws IOException
114      */
115
116     public Reader JavaDoc getReader() throws IOException JavaDoc {
117         try {
118             if (log.isDebugEnabled()) {
119                 log.debug("getInputStream():path=" + path);
120             }
121             Content content = repository.getContent(path);
122             return new InputStreamReader JavaDoc(content.getContentInputStream());
123         } catch (Exception JavaDoc e) {
124             throw new IOException JavaDoc("Error getting reader: " + e);
125         }
126     }
127
128     /**
129      * Get a Reader for the content defined by this content source. The Reader will be constructed using the given
130      * character encoding.
131      *
132      * @param encoding The character encoding
133      * @return A Reader
134      * @throws IOException
135      */
136
137     public Reader JavaDoc getReader(String JavaDoc encoding) throws IOException JavaDoc {
138         try {
139             if (log.isDebugEnabled()) {
140                 log.debug("getInputStream(encoding=" + encoding + "):path=" + path);
141             }
142             Content content = repository.getContent(path);
143             return new InputStreamReader JavaDoc(content.getContentInputStream(),
144                     encoding);
145         } catch (Exception JavaDoc e) {
146             throw new IOException JavaDoc("Error getting reader: " + e);
147         }
148     }
149
150 }
151
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