Pipe


1   /*
2    * Copyright 1999-2004 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   * $Id: Pipe.java,v 1.11 2004/02/17 19:07:09 minchau Exp $
18   */
19  
20  import java.io.IOException  ;
21  
22  import javax.xml.transform.TransformerConfigurationException  ;
23  import javax.xml.transform.TransformerException  ;
24  import javax.xml.transform.TransformerFactory  ;
25  import javax.xml.transform.sax.SAXResult  ;
26  import javax.xml.transform.sax.SAXSource  ;
27  import javax.xml.transform.sax.SAXTransformerFactory  ;
28  import javax.xml.transform.sax.TransformerHandler  ;
29  import javax.xml.transform.stream.StreamSource  ;
30  
31  import org.apache.xml.serializer.Serializer;
32  import org.apache.xml.serializer.SerializerFactory;
33  import org.apache.xml.serializer.OutputPropertiesFactory;
34  import org.xml.sax.SAXException  ;
35  import org.xml.sax.XMLReader  ;
36  import org.xml.sax.helpers.XMLReaderFactory  ;
37  
38    /**
39     * This example shows how to chain a series of transformations by
40     * piping SAX events from one Transformer to another. Each Transformer
41     * operates as a SAX2 XMLFilter/XMLReader.
42     */
43  public class Pipe
44  {
45      public static void main(String  [] args)
46      throws TransformerException  , TransformerConfigurationException  , 
47           SAXException  , IOException       
48      {
49      // Instantiate  a TransformerFactory.
50      TransformerFactory   tFactory = TransformerFactory.newInstance();
51      // Determine whether the TransformerFactory supports The use uf SAXSource 
52      // and SAXResult
53      if (tFactory.getFeature(SAXSource.FEATURE) && tFactory.getFeature(SAXResult.FEATURE))
54      { 
55        // Cast the TransformerFactory to SAXTransformerFactory.
56        SAXTransformerFactory   saxTFactory = ((SAXTransformerFactory  ) tFactory);     
57        // Create a TransformerHandler for each stylesheet.
58        TransformerHandler   tHandler1 = saxTFactory.newTransformerHandler(new StreamSource  ("foo1.xsl"));
59        TransformerHandler   tHandler2 = saxTFactory.newTransformerHandler(new StreamSource  ("foo2.xsl"));
60        TransformerHandler   tHandler3 = saxTFactory.newTransformerHandler(new StreamSource  ("foo3.xsl"));
61      
62        // Create an XMLReader.
63          XMLReader   reader = XMLReaderFactory.createXMLReader();
64        reader.setContentHandler(tHandler1);
65        reader.setProperty("http://xml.org/sax/properties/lexical-handler", tHandler1);
66  
67        tHandler1.setResult(new SAXResult  (tHandler2));
68        tHandler2.setResult(new SAXResult  (tHandler3));
69  
70        // transformer3 outputs SAX events to the serializer.
71        Serializer serializer = SerializerFactory.getSerializer
72                            (OutputPropertiesFactory.getDefaultMethodProperties("xml"));        
73        serializer.setOutputStream(System.out);
74        tHandler3.setResult(new SAXResult  (serializer.asContentHandler()));
75  
76          // Parse the XML input document. The input ContentHandler and output ContentHandler
77        // work in separate threads to optimize performance.   
78        reader.parse("foo.xml");
79      }
80    }
81  }
82
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Free Books Free Magazines
Popular Tags