1   /*
2    * Copyright 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  package org.apache.commons.betwixt;
17  
18  import java.io.FileInputStream;
19  import java.io.InputStream;
20  import java.net.URL;
21  
22  import org.apache.commons.betwixt.io.BeanReader;
23  import org.apache.commons.betwixt.io.BeanWriter;
24  import org.apache.commons.digester.rss.Channel;
25  import org.apache.commons.digester.rss.RSSDigester;
26  
27  /*** Reads an RSS file using Betwixt's auto-digester rules then
28    * outputs it again.
29    *
30    * @author <a href="mailto:jstrachan@apache.org">James Strachan</a>
31    * @version $Revision: 1.4 $
32    */
33  public class RSSBeanReader extends AbstractTestCase {
34      
35      /***
36       * The set of public identifiers, and corresponding resource names,
37       * for the versions of the DTDs that we know about.
38       */
39      protected static final String registrations[] = {
40          "-//Netscape Communications//DTD RSS 0.9//EN",
41          "/org/apache/commons/digester/rss/rss-0.9.dtd",
42          "-//Netscape Communications//DTD RSS 0.91//EN",
43          "/org/apache/commons/digester/rss/rss-0.91.dtd",
44      };
45      
46      public RSSBeanReader(String testName) {
47          super(testName);
48      }
49  
50      public static void main(String[] args) throws Exception {
51          RSSBeanReader sample = new RSSBeanReader("RSS");
52          sample.run( args );
53      }
54      
55      public void run(String[] args) throws Exception {
56          BeanReader reader = new BeanReader();
57          
58          reader.registerBeanClass( Channel.class );
59          
60          // Register local copies of the DTDs we understand
61          for (int i = 0; i < registrations.length; i += 2) {
62              URL url = RSSDigester.class.getResource(registrations[i + 1]);
63              if (url != null) {
64                  reader.register(registrations[i], url.toString());
65              }
66          }
67          
68          Object bean = null;
69          if ( args.length > 0 ) {
70              bean = reader.parse( args[0] );
71          }
72          else {
73              InputStream in = new FileInputStream( getTestFile("src/test/org/apache/commons/betwixt/rss-example.xml") );
74              bean = reader.parse( in ); 
75              in.close();
76          }
77          
78          write( bean );
79      }
80          
81      public void write(Object bean) throws Exception {
82          if ( bean == null ) {
83              throw new Exception( "No bean read from the XML document!" );
84          }
85          BeanWriter writer = new BeanWriter();
86          writer.getXMLIntrospector().getConfiguration().setAttributesForPrimitives(false);
87          writer.enablePrettyPrint();
88          writer.write( bean );
89      }
90  }
91