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1
23 package org.apache.slide.index;
24
25 import java.io.ByteArrayInputStream  ;
26 import java.io.IOException ;
27 import java.io.Reader ;
28 import java.io.StringReader ;
29
30 import javax.xml.parsers.ParserConfigurationException ;
31 import javax.xml.parsers.SAXParser ;
32 import javax.xml.parsers.SAXParserFactory ;
33
34 import org.apache.slide.common.NamespaceAccessToken;
35 import org.apache.slide.common.ServiceInitializationFailedException;
36 import org.apache.slide.content.NodeRevisionContent;
37 import org.apache.slide.content.NodeRevisionDescriptor;
38 import org.apache.slide.util.logger.Logger;
39 import org.xml.sax.SAXException ;
40 import org.xml.sax.helpers.DefaultHandler ;
41
42
46 public class XMLContentIndexer extends TextContentIndexer {
47
48 private SAXParser m_parser;
49
50 public void initialize(NamespaceAccessToken token) throws ServiceInitializationFailedException {
51 super.initialize(token);
52 try {
53 m_parser = SAXParserFactory.newInstance().newSAXParser();
54 }
55 catch (ParserConfigurationException e) {
56 getLogger().log("Error creating parser for indexer", LOG_CHANNEL, Logger.ERROR);
57 throw new ServiceInitializationFailedException(this, e);
58 }
59 catch (SAXException e) {
60 getLogger().log("Error creating parser for indexer", LOG_CHANNEL, Logger.ERROR);
61 throw new ServiceInitializationFailedException(this, e);
62 }
63 }
64
65 protected synchronized Reader readContent(NodeRevisionDescriptor revisionDescriptor,
66 NodeRevisionContent revisionContent) throws IOException {
67 if (revisionDescriptor.getContentType().equals("text/xml")) {
68 try {
69 final XMLContentIndexerHandler handler = new XMLContentIndexerHandler();
70 m_parser.parse(new ByteArrayInputStream (revisionContent.getContentBytes()), handler);
71 return new StringReader (handler.getText());
72 } catch (SAXException e) {
73 getLogger().log("Error parsing xml content for indexer", LOG_CHANNEL, Logger.ERROR);
74 }
75 }
76 return super.readContent(revisionDescriptor, revisionContent);
77 }
78
79 private static final class XMLContentIndexerHandler extends DefaultHandler {
80
81 private final StringBuffer m_text = new StringBuffer ();
82
83 public void characters(char[] ch, int start, int length) throws SAXException {
84 m_text.append(ch, start, length);
85 }
86
87 public void endElement(String uri, String localName, String qName) throws SAXException {
88 super.endElement(uri, localName, qName);
89 m_text.append(' ');
90 }
91
92 public String getText() {
93 return m_text.toString();
94 }
95
96 }
97
98
99 }
100 |
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