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Java > Open Source Codes > org > apache > jetspeed > xml > JetspeedXMLEntityResolver


1 /*
2  * Copyright 2000-2001,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17 package org.apache.jetspeed.xml;
18
19 import java.io.*;
20 //Jetspeed cache
21 import org.apache.jetspeed.cache.disk.*;
22
23 import org.xml.sax.*;
24
25
26 /**
27  * an entity resolver which tries to lookup DTD files
28  * through the URL Manager.
29  *
30  * TODO: Should be a singleton.
31  *
32  *@author <A HREF="mailto:christian.sell@netcologne.de">Christian Sell</A>
33  *@author <A HREF="mailto:sgala@hisitech.com">Santiago Gala</A>
34  *@version $Id: JetspeedXMLEntityResolver.java,v 1.8 2004/02/23 03:14:43 jford Exp $
35  *
36  **/
37 public class JetspeedXMLEntityResolver implements EntityResolver
38 {
39     public InputSource resolveEntity (String JavaDoc publicId, String JavaDoc systemId)
40     {
41         try {
42             //access Jetspeed cache and get a java.io.Reader
43 Reader rdr = JetspeedDiskCache.getInstance().
44                 getEntry(systemId).getReader();
45             InputSource is = new InputSource(rdr);
46             is.setPublicId( publicId );
47             is.setSystemId( systemId );
48             return is;
49         } catch(IOException x)
50         {
51             System.err.println("JER: ( " + publicId +
52                                " Taking " + systemId + " from cache throwed Exception: " + x);
53             
54         }
55         return null;
56     }
57 }
58
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