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annotate software/mpdl-services/mpiwg-mpdl-cms/src/de/mpg/mpiwg/berlin/mpdl/cms/transform/QueryTransformer.java @ 23:e845310098ba

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author Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
date Tue, 27 Nov 2012 12:35:19 +0100
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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1 package de.mpg.mpiwg.berlin.mpdl.cms.transform;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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2
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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3 import java.io.IOException;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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4 import java.io.StringWriter;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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5 import java.net.URL;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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6
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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7 import javax.xml.transform.stream.StreamSource;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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8
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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9 import de.mpg.mpiwg.berlin.mpdl.exception.ApplicationException;
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10
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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11 import net.sf.saxon.s9api.Processor;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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12 import net.sf.saxon.s9api.QName;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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13 import net.sf.saxon.s9api.SaxonApiException;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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14 import net.sf.saxon.s9api.Serializer;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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15 import net.sf.saxon.s9api.XdmAtomicValue;
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16 import net.sf.saxon.s9api.XdmValue;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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17 import net.sf.saxon.s9api.XsltCompiler;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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18 import net.sf.saxon.s9api.XsltExecutable;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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19 import net.sf.saxon.s9api.XsltTransformer;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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20
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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21 public class QueryTransformer {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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22 private Processor processor;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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23 private XsltCompiler xsltCompiler;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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24 private XsltTransformer xsltQueryDocument;
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25
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26 public QueryTransformer() throws ApplicationException {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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27 init();
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28 }
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29
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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30 private void init() throws ApplicationException {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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31 try {
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32 processor = new Processor(false);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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33 xsltCompiler = processor.newXsltCompiler();
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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34 URL queryDocumentXslUrl = QueryTransformer.class.getResource("queryDocument.xsl");
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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35 StreamSource xslStreamSource = new StreamSource(queryDocumentXslUrl.openStream());
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36 XsltExecutable xsltExecutable = xsltCompiler.compile(xslStreamSource);
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37 xsltQueryDocument = xsltExecutable.load();
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38 } catch (SaxonApiException e) {
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39 throw new ApplicationException(e);
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40 } catch (IOException e) {
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41 throw new ApplicationException(e);
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42 }
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43 }
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44
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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45 public String queryDocument(String xmlFileName, String query, String flags, String outputFormat) throws ApplicationException {
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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46 String pageFragment = null;
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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47 try {
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48 StreamSource xmlDoc = new StreamSource(xmlFileName);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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49 Serializer serializer = new Serializer();
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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50 serializer.setOutputWriter(new StringWriter());
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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51 serializer.setOutputProperty(Serializer.Property.INDENT, "yes");
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52 xsltQueryDocument.setSource(xmlDoc); // needs some time for bigger documents
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53 xsltQueryDocument.setDestination(serializer);
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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54 QName queryQName = new QName("query");
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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55 XdmValue queryXdmValue = new XdmAtomicValue(query);
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56 QName flagsQName = new QName("flags");
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57 XdmValue flagsXdmValue = new XdmAtomicValue(flags);
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58 QName outputFormatQName = new QName("outputFormat");
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Josef Willenborg <jwillenborg@mpiwg-berlin.mpg.de>
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59 XdmValue outputFormatXdmValue = new XdmAtomicValue(outputFormat);
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60 xsltQueryDocument.setParameter(queryQName, queryXdmValue);
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61 xsltQueryDocument.setParameter(flagsQName, flagsXdmValue);
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62 xsltQueryDocument.setParameter(outputFormatQName, outputFormatXdmValue);
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63 xsltQueryDocument.transform(); // needs some time for bigger documents
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64 pageFragment = serializer.getOutputDestination().toString();
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65 } catch (Exception e) {
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66 throw new ApplicationException(e);
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67 }
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68 return pageFragment;
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69 }
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70 }