Save This Page
1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * Copyright 2001-2004 The Apache Software Foundation.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20 /*
21 * $Id: TrAXFilter.java,v 1.2.4.1 2005/09/06 12:23:19 pvedula Exp $
22 */
23
24
25 package com.sun.org.apache.xalan.internal.xsltc.trax;
26
27 import java.io.IOException;
28
29 import javax.xml.XMLConstants;
30 import javax.xml.parsers.FactoryConfigurationError;
31 import javax.xml.parsers.ParserConfigurationException;
32 import javax.xml.parsers.SAXParser;
33 import javax.xml.parsers.SAXParserFactory;
34 import javax.xml.transform.ErrorListener;
35 import javax.xml.transform.Templates;
36 import javax.xml.transform.Transformer;
37 import javax.xml.transform.TransformerConfigurationException;
38 import javax.xml.transform.sax.SAXResult;
39
40 import com.sun.org.apache.xml.internal.utils.XMLReaderManager;
41
42 import org.xml.sax.ContentHandler;
43 import org.xml.sax.InputSource;
44 import org.xml.sax.SAXException;
45 import org.xml.sax.XMLReader;
46 import org.xml.sax.helpers.XMLFilterImpl;
47 import org.xml.sax.helpers.XMLReaderFactory;
48
49 /**
50 * skeleton extension of XMLFilterImpl for now.
51 * @author Santiago Pericas-Geertsen
52 * @author G. Todd Miller
53 */
54 public class TrAXFilter extends XMLFilterImpl {
55 private Templates _templates;
56 private TransformerImpl _transformer;
57 private TransformerHandlerImpl _transformerHandler;
58
59 public TrAXFilter(Templates templates) throws
60 TransformerConfigurationException
61 {
62 _templates = templates;
63 _transformer = (TransformerImpl) templates.newTransformer();
64 _transformerHandler = new TransformerHandlerImpl(_transformer);
65 }
66
67 public Transformer getTransformer() {
68 return _transformer;
69 }
70
71 private void createParent() throws SAXException {
72 XMLReader parent = null;
73 try {
74 SAXParserFactory pfactory = SAXParserFactory.newInstance();
75 pfactory.setNamespaceAware(true);
76
77 if (_transformer.isSecureProcessing()) {
78 try {
79 pfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
80 }
81 catch (SAXException e) {}
82 }
83
84 SAXParser saxparser = pfactory.newSAXParser();
85 parent = saxparser.getXMLReader();
86 }
87 catch (ParserConfigurationException e) {
88 throw new SAXException(e);
89 }
90 catch (FactoryConfigurationError e) {
91 throw new SAXException(e.toString());
92 }
93
94 if (parent == null) {
95 parent = XMLReaderFactory.createXMLReader();
96 }
97
98 // make this XMLReader the parent of this filter
99 setParent(parent);
100 }
101
102 public void parse (InputSource input) throws SAXException, IOException
103 {
104 XMLReader managedReader = null;
105
106 try {
107 if (getParent() == null) {
108 try {
109 managedReader = XMLReaderManager.getInstance()
110 .getXMLReader();
111 setParent(managedReader);
112 } catch (SAXException e) {
113 throw new SAXException(e.toString());
114 }
115 }
116
117 // call parse on the parent
118 getParent().parse(input);
119 } finally {
120 if (managedReader != null) {
121 XMLReaderManager.getInstance().releaseXMLReader(managedReader);
122 }
123 }
124 }
125
126 public void parse (String systemId) throws SAXException, IOException
127 {
128 parse(new InputSource(systemId));
129 }
130
131 public void setContentHandler (ContentHandler handler)
132 {
133 _transformerHandler.setResult(new SAXResult(handler));
134 if (getParent() == null) {
135 try {
136 createParent();
137 }
138 catch (SAXException e) {
139 return;
140 }
141 }
142 getParent().setContentHandler(_transformerHandler);
143 }
144
145 public void setErrorListener (ErrorListener handler) { }
146 }