Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/util/XSLTransformer.java @ 998:27029f0ec7e1

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Reverted the changes of rev1194. gnv/trunk@1199 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 11 Jun 2010 10:28:50 +0000
parents 9b126bceb0b2
children b1eea43ba133
rev   line source
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3cb753564552 Integration of the required XSL-Transformation of the Describe-Response of the Artifactdatabase
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1 package de.intevation.gnv.util;
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2
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3 import java.io.ByteArrayOutputStream;
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4 import java.io.File;
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5 import java.io.UnsupportedEncodingException;
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6 import java.util.HashMap;
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7 import java.util.Map;
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8
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9 import javax.xml.transform.Source;
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10 import javax.xml.transform.Transformer;
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11 import javax.xml.transform.TransformerConfigurationException;
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12 import javax.xml.transform.TransformerException;
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13 import javax.xml.transform.TransformerFactory;
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14 import javax.xml.transform.TransformerFactoryConfigurationError;
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15 import javax.xml.transform.dom.DOMSource;
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16 import javax.xml.transform.stream.StreamResult;
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17 import javax.xml.transform.stream.StreamSource;
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18
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19 import org.apache.log4j.Logger;
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20 import org.w3c.dom.Node;
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21
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22 /**
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23 * This xsl transformer is used to transform incoming xml documents with the
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24 * help of templates into a html representation.
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25 *
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26 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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27 */
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28 public class XSLTransformer {
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29
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30 /**
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31 * the logger, used to log exceptions and additonaly information
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32 */
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33 private static Logger log = Logger.getLogger(XSLTransformer.class);
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34
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35 /**
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36 * The parameter that is required in the XSL sheet.
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37 */
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38 private Map<String, String> params;
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39
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40 /**
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41 * Constructor
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42 */
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43 public XSLTransformer() {
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44 super();
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45 }
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46
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47 /**
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48 * Turns <i>toTransform</i> into another format using the template <i>
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49 * templateFileName</i> with the <i>encoding</i>. The parameters added in
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50 * {@link #addParameter(java.lang.String, java.lang.String)} are available
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51 * in the transformer.
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52 *
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53 * @param toTransform The node to be transformed.
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54 * @param encoding The encoding to be used.
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55 * @param templateFileName The template used for transformation.
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56 * @return the transformed document as string.
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57 */
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58 public String transform(Node toTransform, String encoding,
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59 String templateFileName) {
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60 String resultValue = null;
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61 try {
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62 Source templateSource = new StreamSource(new File(templateFileName));
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63 TransformerFactory xformFactory = TransformerFactory.newInstance();
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64 Transformer transformer = xformFactory
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65 .newTransformer(templateSource);
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67 if (params != null) {
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68 for(Map.Entry<String, String> entry: params.entrySet()) {
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69 transformer.setParameter(entry.getKey(), entry.getValue());
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70 }
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71 }
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72
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73 ByteArrayOutputStream baos = new ByteArrayOutputStream();
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74 StreamResult scrResult = new StreamResult(baos);
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75 // log.debug(xmlUtils.writeNode2String(toTransform));
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76 DOMSource source = new DOMSource(toTransform);
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77 transformer.transform(source, scrResult);
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78 resultValue = new String(baos.toByteArray(), encoding);
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79 } catch (TransformerConfigurationException e) {
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80 log.error(e, e);
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81 } catch (UnsupportedEncodingException e) {
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82 log.error(e, e);
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83 } catch (TransformerFactoryConfigurationError e) {
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84 log.error(e, e);
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85 } catch (TransformerException e) {
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86 log.error(e, e);
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87 }
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88
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89 return resultValue;
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90 }
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91
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93 /**
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94 * Add a parameter that is required in the XSL sheet.
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95 *
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96 * @param name The name of the parameter.
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97 * @param value The value of the parameter.
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98 */
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99 public void addParameter(String name, String value) {
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100 if (params == null) {
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101 params = new HashMap<String, String>(3);
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102 }
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104 params.put(name, value);
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105 }
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106 }
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107 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org