Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/XMLUtils.java @ 25:ccc6aae25585
Moved some XPath stuff from Config into XMLUtils.
artifacts/trunk@59 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Thu, 10 Sep 2009 09:23:53 +0000 |
parents | 00596a591a2f |
children | 83a059c204f8 |
rev | line source |
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1 package de.intevation.artifactdatabase; |
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2 |
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3 import org.w3c.dom.Document; |
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4 import org.w3c.dom.Element; |
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5 import org.w3c.dom.Attr; |
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6 |
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7 import javax.xml.parsers.DocumentBuilderFactory; |
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8 |
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9 import javax.xml.parsers.ParserConfigurationException; |
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10 |
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11 import org.apache.log4j.Logger; |
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12 |
23
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13 import javax.xml.xpath.XPathFactory; |
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14 import javax.xml.xpath.XPath; |
25
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15 import javax.xml.xpath.XPathExpressionException; |
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16 |
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17 import javax.xml.namespace.NamespaceContext; |
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18 import javax.xml.namespace.QName; |
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19 |
20
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20 /** |
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21 * @author Sascha L. Teichmann |
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22 */ |
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23 public final class XMLUtils |
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24 { |
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25 private static Logger logger = Logger.getLogger(XMLUtils.class); |
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26 |
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27 private XMLUtils() { |
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28 } |
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29 |
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30 public static class ElementCreator |
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31 { |
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32 protected Document document; |
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33 protected String ns; |
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34 protected String prefix; |
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35 |
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36 public ElementCreator(Document document, String ns, String prefix) { |
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37 this.document = document; |
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38 this.ns = ns; |
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39 this.prefix = prefix; |
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40 } |
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41 |
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42 public Element create(String name) { |
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43 Element element = document.createElementNS(ns, name); |
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44 element.setPrefix(prefix); |
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45 return element; |
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46 } |
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47 |
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48 public void addAttr(Element element, String name, String value) { |
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49 Attr attr = document.createAttributeNS(ns, name); |
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50 attr.setValue(value); |
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51 attr.setPrefix(prefix); |
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52 element.setAttributeNode(attr); |
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53 } |
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54 } // class ElementCreator |
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55 |
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56 public static final Document newDocument() { |
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57 try { |
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58 return DocumentBuilderFactory |
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59 .newInstance() |
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60 .newDocumentBuilder() |
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61 .newDocument(); |
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62 } |
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63 catch (ParserConfigurationException pce) { |
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64 logger.error(pce.getLocalizedMessage(), pce); |
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65 } |
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66 return null; |
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67 } |
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68 |
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69 public static final XPath newXPath() { |
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70 return newXPath(null); |
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71 } |
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72 |
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73 public static final XPath newXPath(NamespaceContext namespaceContext) { |
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74 XPathFactory factory = XPathFactory.newInstance(); |
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75 XPath xpath = factory.newXPath(); |
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76 if (namespaceContext != null) { |
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77 xpath.setNamespaceContext(namespaceContext); |
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78 } |
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79 return xpath; |
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80 } |
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81 |
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82 public static final Object xpath(Object root, String query, QName returnTyp) { |
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83 return xpath(root, query, returnTyp, null); |
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84 } |
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85 |
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86 public static final Object xpath( |
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87 Object root, |
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88 String query, |
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89 QName returnType, |
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90 NamespaceContext namespaceContext |
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91 ) { |
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92 if (root == null) { |
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93 return null; |
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94 } |
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95 |
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96 try { |
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97 XPath xpath = newXPath(namespaceContext); |
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98 if (xpath != null) { |
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99 return xpath.evaluate(query, root, returnType); |
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100 } |
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101 } |
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102 catch (XPathExpressionException xpee) { |
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103 logger.error(xpee.getLocalizedMessage(), xpee); |
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104 } |
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105 |
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106 return null; |
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107 } |
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108 } |
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109 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |