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Java > Open Source Codes > org > apache > velocity > runtime > resource > ContentResource


1 package org.apache.velocity.runtime.resource;
2
3 /*
4  * Copyright 2001,2004 The Apache Software Foundation.
5  *
6  * Licensed under the Apache License, Version 2.0 (the "License");
7  * you may not use this file except in compliance with the License.
8  * You may obtain a copy of the License at
9  *
10  * http://www.apache.org/licenses/LICENSE-2.0
11  *
12  * Unless required by applicable law or agreed to in writing, software
13  * distributed under the License is distributed on an "AS IS" BASIS,
14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15  * See the License for the specific language governing permissions and
16  * limitations under the License.
17  */
18
19 import java.io.StringWriter JavaDoc;
20 import java.io.BufferedReader JavaDoc;
21 import java.io.InputStreamReader JavaDoc;
22
23 import org.apache.velocity.exception.ResourceNotFoundException;
24
25 /**
26  * This class represent a general text resource that may have been
27  * retrieved from any number of possible sources.
28  *
29  * Also of interest is Velocity's {@link org.apache.velocity.Template}
30  * <code>Resource</code>.
31  *
32  * @author <a HREF="mailto:jvanzyl@apache.org">Jason van Zyl</a>
33  * @author <a HREF="mailto:geirm@optonline.net">Geir Magnusson Jr.</a>
34  * @version $Id: ContentResource.java,v 1.10.4.1 2004/03/03 23:23:01 geirm Exp $
35  */
36 public class ContentResource extends Resource
37 {
38     /** Default empty constructor */
39     public ContentResource()
40     {
41     }
42     
43     /**
44      * Pull in static content and store it.
45      *
46      * @exception ResourceNotFoundException Resource could not be
47      * found.
48      */
49     public boolean process()
50         throws ResourceNotFoundException
51     {
52         BufferedReader JavaDoc reader = null;
53
54         try
55         {
56             StringWriter JavaDoc sw = new StringWriter JavaDoc();
57             
58             reader = new BufferedReader JavaDoc(
59                 new InputStreamReader JavaDoc(resourceLoader.getResourceStream(name),
60                                       encoding));
61             
62             char buf[] = new char[1024];
63             int len = 0;
64             
65             while ( ( len = reader.read( buf, 0, 1024 )) != -1)
66                 sw.write( buf, 0, len );
67         
68             setData(sw.toString());
69            
70             return true;
71         }
72         catch ( ResourceNotFoundException e )
73         {
74             // Tell the ContentManager to continue to look through any
75 // remaining configured ResourceLoaders.
76 throw e;
77         }
78         catch ( Exception JavaDoc e )
79         {
80             rsvc.error("Cannot process content resource : " + e.toString() );
81             return false;
82         }
83         finally
84         {
85             if (reader != null)
86             {
87                 try
88                 {
89                     reader.close();
90                 }
91                 catch (Exception JavaDoc ignored)
92                 {
93                 }
94             }
95         }
96     }
97 }
98
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