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18 package org.apache.any23.extractor.rdfa;
19
20 import org.slf4j.Logger;
21 import org.slf4j.LoggerFactory;
22 import org.w3c.dom.Document;
23
24 import javax.xml.transform.Transformer;
25 import javax.xml.transform.TransformerConfigurationException;
26 import javax.xml.transform.TransformerException;
27 import javax.xml.transform.TransformerFactory;
28 import javax.xml.transform.dom.DOMSource;
29 import javax.xml.transform.stream.StreamResult;
30 import javax.xml.transform.stream.StreamSource;
31 import java.io.InputStream;
32 import java.io.Writer;
33 import java.util.HashMap;
34 import java.util.Map;
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42 public class XSLTStylesheet {
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44 private final static Logger log = LoggerFactory.getLogger(XSLTStylesheet.class);
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46 private final Transformer transformer;
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48 public XSLTStylesheet(InputStream xsltFile) {
49 try {
50 transformer = TransformerFactory.newInstance().newTransformer(new StreamSource(xsltFile));
51 } catch (TransformerConfigurationException e) {
52 throw new RuntimeException("Should not happen, we use the default configuration", e);
53 }
54 }
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67 public synchronized void applyTo(Document document, Writer output) throws XSLTStylesheetException {
68 this.applyTo(document, output, new HashMap<String, String>());
69 }
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85 public synchronized void applyTo(Document document, Writer output, Map<String, String> parameters)
86 throws XSLTStylesheetException {
87 for (String parameterKey : parameters.keySet()) {
88 transformer.setParameter(parameterKey, parameters.get(parameterKey));
89 }
90 try {
91 transformer.transform(new DOMSource(document, document.getBaseURI()), new StreamResult(output));
92 } catch (TransformerException te) {
93 log.error("------ BEGIN XSLT Transformer Exception ------");
94 log.error("Exception in XSLT Stylesheet transformation.", te);
95 log.error("Input DOM node:", document);
96 log.error("Input DOM node getBaseIRI:", document.getBaseURI());
97 log.error("Output writer:", output);
98 log.error("------ END XSLT Transformer Exception ------");
99 throw new XSLTStylesheetException(" An error occurred during the XSLT transformation", te);
100 }
101 }
102
103 }