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19
20
21 package org.apache.xalan.xsltc.trax;
22
23 import java.io.IOException  ;
24
25 import javax.xml.parsers.FactoryConfigurationError ;
26 import javax.xml.parsers.ParserConfigurationException ;
27 import javax.xml.parsers.SAXParser ;
28 import javax.xml.parsers.SAXParserFactory ;
29 import javax.xml.transform.ErrorListener ;
30 import javax.xml.transform.Templates ;
31 import javax.xml.transform.Transformer ;
32 import javax.xml.transform.TransformerConfigurationException ;
33 import javax.xml.transform.sax.SAXResult ;
34
35 import org.apache.xml.utils.XMLReaderManager;
36
37 import org.xml.sax.ContentHandler ;
38 import org.xml.sax.InputSource ;
39 import org.xml.sax.SAXException ;
40 import org.xml.sax.XMLReader ;
41 import org.xml.sax.helpers.XMLFilterImpl ;
42 import org.xml.sax.helpers.XMLReaderFactory ;
43
44
49 public class TrAXFilter extends XMLFilterImpl {
50 private Templates _templates;
51 private TransformerImpl _transformer;
52 private TransformerHandlerImpl _transformerHandler;
53
54 public TrAXFilter(Templates templates) throws
55 TransformerConfigurationException
56 {
57 _templates = templates;
58 _transformer = (TransformerImpl) templates.newTransformer();
59 _transformerHandler = new TransformerHandlerImpl(_transformer);
60 }
61
62 public Transformer getTransformer() {
63 return _transformer;
64 }
65
66 private void createParent() throws SAXException {
67 XMLReader parent = null;
68 try {
69 SAXParserFactory pfactory = SAXParserFactory.newInstance();
70 pfactory.setNamespaceAware(true);
71 SAXParser saxparser = pfactory.newSAXParser();
72 parent = saxparser.getXMLReader();
73 }
74 catch (ParserConfigurationException e) {
75 throw new SAXException (e);
76 }
77 catch (FactoryConfigurationError e) {
78 throw new SAXException (e.toString());
79 }
80
81 if (parent == null) {
82 parent = XMLReaderFactory.createXMLReader();
83 }
84
85 setParent(parent);
87 }
88
89 public void parse (InputSource input) throws SAXException , IOException
90 {
91 XMLReader managedReader = null;
92
93 try {
94 if (getParent() == null) {
95 try {
96 managedReader = XMLReaderManager.getInstance()
97 .getXMLReader();
98 setParent(managedReader);
99 } catch (SAXException e) {
100 throw new SAXException (e.toString());
101 }
102 }
103
104 getParent().parse(input);
106 } finally {
107 if (managedReader != null) {
108 XMLReaderManager.getInstance().releaseXMLReader(managedReader);
109 }
110 }
111 }
112
113 public void parse (String systemId) throws SAXException , IOException
114 {
115 parse(new InputSource (systemId));
116 }
117
118 public void setContentHandler (ContentHandler handler)
119 {
120 _transformerHandler.setResult(new SAXResult (handler));
121 if (getParent() == null) {
122 try {
123 createParent();
124 }
125 catch (SAXException e) {
126 return;
127 }
128 }
129 getParent().setContentHandler(_transformerHandler);
130 }
131
132 public void setErrorListener (ErrorListener handler) { }
133 }
134 |
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