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1
18
19 package org.apache.batik.transcoder;
20
21 import java.io.IOException  ;
22
23 import org.apache.batik.dom.util.DocumentFactory;
24 import org.apache.batik.dom.util.SAXDocumentFactory;
25 import org.apache.batik.transcoder.keys.BooleanKey;
26 import org.apache.batik.transcoder.keys.DOMImplementationKey;
27 import org.apache.batik.transcoder.keys.StringKey;
28 import org.apache.batik.util.XMLResourceDescriptor;
29 import org.w3c.dom.DOMException ;
30 import org.w3c.dom.DOMImplementation ;
31 import org.w3c.dom.Document ;
32
33
52 public abstract class XMLAbstractTranscoder extends AbstractTranscoder {
53
54
57 protected XMLAbstractTranscoder() {
58 hints.put(KEY_XML_PARSER_VALIDATING, Boolean.FALSE);
59 }
60
61
71 public void transcode(TranscoderInput input, TranscoderOutput output)
72 throws TranscoderException {
73
74 Document document = null;
75 String uri = input.getURI();
76 if (input.getDocument() != null) {
77 document = input.getDocument();
78 } else {
79 String parserClassname =
80 (String )hints.get(KEY_XML_PARSER_CLASSNAME);
81 String namespaceURI =
82 (String )hints.get(KEY_DOCUMENT_ELEMENT_NAMESPACE_URI);
83 String documentElement =
84 (String )hints.get(KEY_DOCUMENT_ELEMENT);
85 DOMImplementation domImpl =
86 (DOMImplementation )hints.get(KEY_DOM_IMPLEMENTATION);
87
88 if (parserClassname == null) {
89 parserClassname = XMLResourceDescriptor.getXMLParserClassName();
90 }
91 if (domImpl == null) {
92 handler.fatalError(new TranscoderException(
93 "Unspecified transcoding hints: KEY_DOM_IMPLEMENTATION"));
94 return;
95 }
96 if (namespaceURI == null) {
97 handler.fatalError(new TranscoderException(
98 "Unspecified transcoding hints: KEY_DOCUMENT_ELEMENT_NAMESPACE_URI"));
99 return;
100 }
101 if (documentElement == null) {
102 handler.fatalError(new TranscoderException(
103 "Unspecified transcoding hints: KEY_DOCUMENT_ELEMENT"));
104 return;
105 }
106 DocumentFactory f = createDocumentFactory(domImpl, parserClassname);
108 boolean b =
109 ((Boolean )hints.get(KEY_XML_PARSER_VALIDATING)).booleanValue();
110 f.setValidating(b);
111 try {
112 if (input.getInputStream() != null) {
113 document = f.createDocument(namespaceURI,
114 documentElement,
115 input.getURI(),
116 input.getInputStream());
117 } else if (input.getReader() != null) {
118 document = f.createDocument(namespaceURI,
119 documentElement,
120 input.getURI(),
121 input.getReader());
122 } else if (input.getXMLReader() != null) {
123 document = f.createDocument(namespaceURI,
124 documentElement,
125 input.getURI(),
126 input.getXMLReader());
127 } else if (uri != null) {
128 document = f.createDocument(namespaceURI,
129 documentElement,
130 uri);
131 }
132 } catch (DOMException ex) {
133 handler.fatalError(new TranscoderException(ex));
134 } catch (IOException ex) {
135 ex.printStackTrace();
136 handler.fatalError(new TranscoderException(ex));
137 }
138 }
139 if (document != null) {
141 try {
142 transcode(document, uri, output);
143 } catch(TranscoderException ex) {
144 handler.fatalError(ex);
146 return;
147 }
148 }
149 }
150
151
160 protected DocumentFactory createDocumentFactory(DOMImplementation domImpl,
161 String parserClassname) {
162 return new SAXDocumentFactory(domImpl, parserClassname);
163 }
164
165
173 protected abstract void transcode(Document document,
174 String uri,
175 TranscoderOutput output)
176 throws TranscoderException;
177
178
182
202 public static final TranscodingHints.Key KEY_XML_PARSER_CLASSNAME
203 = new StringKey();
204
205
225 public static final TranscodingHints.Key KEY_XML_PARSER_VALIDATING
226 = new BooleanKey();
227
228
249 public static final TranscodingHints.Key KEY_DOCUMENT_ELEMENT
250 = new StringKey();
251
252
274 public static final TranscodingHints.Key KEY_DOCUMENT_ELEMENT_NAMESPACE_URI
275 = new StringKey();
276
277
298 public static final TranscodingHints.Key KEY_DOM_IMPLEMENTATION
299 = new DOMImplementationKey();
300 }
301
302
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