Mercurial > dive4elements > gnv-client

annotate gnv/src/main/java/de/intevation/gnv/util/XMLUtils.java @ 670:b89b31293772

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Implemented first things to store/load projects. gnv/trunk@793 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 17 Mar 2010 13:31:38 +0000
parents 2e690cb2247c
children 15ac78a91d1b
rev   line source
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1 package de.intevation.gnv.util;
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2
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3 import java.io.IOException;
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4 import java.io.InputStream;
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5 import java.io.OutputStream;
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6 import java.io.StringBufferInputStream;
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7 import java.io.StringWriter;
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8
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9 import javax.xml.namespace.NamespaceContext;
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10 import javax.xml.namespace.QName;
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11 import javax.xml.parsers.DocumentBuilder;
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12 import javax.xml.parsers.DocumentBuilderFactory;
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13 import javax.xml.parsers.ParserConfigurationException;
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14 import javax.xml.transform.Transformer;
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15 import javax.xml.transform.TransformerConfigurationException;
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16 import javax.xml.transform.TransformerException;
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17 import javax.xml.transform.TransformerFactory;
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18 import javax.xml.transform.TransformerFactoryConfigurationError;
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19 import javax.xml.transform.dom.DOMSource;
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20 import javax.xml.transform.stream.StreamResult;
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21 import javax.xml.xpath.XPath;
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22 import javax.xml.xpath.XPathConstants;
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23 import javax.xml.xpath.XPathExpressionException;
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24 import javax.xml.xpath.XPathFactory;
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25
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26 import org.apache.log4j.Logger;
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27 import org.w3c.dom.Attr;
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28 import org.w3c.dom.Document;
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29 import org.w3c.dom.Element;
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30 import org.w3c.dom.Node;
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31 import org.w3c.dom.NodeList;
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32 import org.xml.sax.SAXException;
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33
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34 /**
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35 * @author Sascha L. Teichmann
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36 */
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37 public class XMLUtils {
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38 private static Logger logger = Logger.getLogger(XMLUtils.class);
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39
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40 public XMLUtils() {
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41 }
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42
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43 public static class ElementCreator {
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44 protected Document document;
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45 protected String ns;
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46 protected String prefix;
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47
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48 public ElementCreator(Document document, String ns, String prefix) {
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49 this.document = document;
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50 this.ns = ns;
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51 this.prefix = prefix;
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52 }
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53
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54 public Element create(String name) {
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55 Element element = document.createElementNS(ns, name);
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56 element.setPrefix(prefix);
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57 return element;
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58 }
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59
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60 public void addAttr(Element element, String name, String value) {
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61 Attr attr = document.createAttributeNS(ns, name);
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62 attr.setValue(value);
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63 attr.setPrefix(prefix);
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64 element.setAttributeNode(attr);
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65 }
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66 } // class ElementCreator
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67
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68 public static Document newDocument() {
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69 try {
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70 return DocumentBuilderFactory.newInstance().newDocumentBuilder()
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71 .newDocument();
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72 } catch (ParserConfigurationException pce) {
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73 logger.error(pce.getLocalizedMessage(), pce);
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74 }
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75 return null;
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76 }
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77
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78 public static XPath newXPath() {
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79 return newXPath(null);
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80 }
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81
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82 public static XPath newXPath(NamespaceContext namespaceContext) {
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83 XPathFactory factory = XPathFactory.newInstance();
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84 XPath xpath = factory.newXPath();
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85 if (namespaceContext != null) {
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86 xpath.setNamespaceContext(namespaceContext);
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87 }
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88 return xpath;
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89 }
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90
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91 public static Object xpath(Object root, String query, QName returnTyp) {
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92 return xpath(root, query, returnTyp, null);
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93 }
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94
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95 public static final String xpathString(Object root, String query,
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96 NamespaceContext namespaceContext) {
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97 return (String) xpath(root, query, XPathConstants.STRING,
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98 namespaceContext);
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99 }
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100
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101 public static final Object xpath(Object root, String query,
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102 QName returnType,
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103 NamespaceContext namespaceContext) {
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104 if (root == null) {
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105 return null;
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106 }
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107
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108 try {
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109 XPath xpath = new XMLUtils().newXPath(namespaceContext);
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110 if (xpath != null) {
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111 return xpath.evaluate(query, root, returnType);
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112 }
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113 } catch (XPathExpressionException xpee) {
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114 logger.error(xpee.getLocalizedMessage(), xpee);
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115 }
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116
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117 return null;
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118 }
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119
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120 public static Object getXPath(Object root, String query, QName returnType) {
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121 return getXPath(root,query,returnType,ArtifactNamespaceContext.INSTANCE);
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122 }
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124 public static Object getXPath(
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125 Object root, String query, QName returnType, NamespaceContext context
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126 ) {
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127 return xpath(root, query, returnType, context);
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128 }
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129
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130 public static String getStringXPath(String xpath) {
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131 return getStringXPath(xpath, null);
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132 }
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134 public static NodeList getNodeSetXPath(Object root, String query) {
36
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135 return (NodeList) getXPath(root, query, XPathConstants.NODESET);
2
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136 }
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137
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138 public static Node getNodeXPath(Object root, String query) {
36
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139 return (Node) getXPath(root, query, XPathConstants.NODE);
2
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140 }
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141
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142 public static String getStringXPath(Object root, String xpath) {
2
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143 return getStringXPath(root, xpath, null);
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144 }
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145
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146 public static String getStringXPath(Object root, String query, String def) {
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147 String s = (String) getXPath(root, query, XPathConstants.STRING);
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148 return s == null || s.length() == 0 ? def : s;
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149 }
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150
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cbd397712ecf Render an OpenLayers map with the layer even published after triggering shapefile and mapfile creation.
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151 public static Document readDocument(InputStream inputStream) {
2
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152 Document returnValue = null;
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153 try {
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154 DocumentBuilderFactory docBuilderFactory = DocumentBuilderFactory
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155 .newInstance();
389
416ff31f6273 Removed local-name() method from xsl stylesheet and adjusted xpathes while reading xml documents.
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156 docBuilderFactory.setNamespaceAware(true);
2
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157 DocumentBuilder docBuilder = docBuilderFactory.newDocumentBuilder();
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158 returnValue = docBuilder.parse(inputStream);
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159 } catch (ParserConfigurationException e) {
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160 logger.error(e, e);
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161 } catch (SAXException e) {
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162 logger.error(e, e);
2
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163 } catch (IOException e) {
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164 logger.error(e, e);
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165 }
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166 return returnValue;
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167 }
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168
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169 public static String writeNode2String(Node node) {
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170 try {
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171 DOMSource source = new DOMSource(node);
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172 return writeDOMSource2String(source);
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173 } catch (TransformerConfigurationException e) {
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174 logger.error(e, e);
2
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175 } catch (TransformerFactoryConfigurationError e) {
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176 logger.error(e, e);
2
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177 } catch (TransformerException e) {
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178 logger.error(e, e);
2
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179 }
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180 return null;
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181 }
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182
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183 public static Document reInitDocument(Document document) {
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184
585
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185 StringBufferInputStream inputStream = new StringBufferInputStream(
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186 writeDocument2String(document));
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187 return readDocument(inputStream);
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188 }
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189
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190 public static String writeDocument2String(Document document) {
11
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191 try {
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192 DOMSource source = new DOMSource(document);
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193 return writeDOMSource2String(source);
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194 } catch (TransformerConfigurationException e) {
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195 logger.error(e, e);
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196 } catch (TransformerFactoryConfigurationError e) {
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197 logger.error(e, e);
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198 } catch (TransformerException e) {
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199 logger.error(e, e);
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200 }
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201 return null;
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202 }
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203
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204 /**
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205 * @param source
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206 * @return
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207 * @throws TransformerFactoryConfigurationError
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208 * @throws TransformerConfigurationException
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209 * @throws TransformerException
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210 */
585
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diff changeset
211 private static String writeDOMSource2String(DOMSource source)
38
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212 throws TransformerFactoryConfigurationError,
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213 TransformerConfigurationException,
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214 TransformerException {
36
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215 TransformerFactory transformerFactory = TransformerFactory
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216 .newInstance();
11
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217 Transformer transformer = transformerFactory.newTransformer();
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218 StringWriter sw = new StringWriter();
36
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219 StreamResult result = new StreamResult(sw);
11
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220 transformer.transform(source, result);
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221 return sw.getBuffer().toString();
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222 }
670
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223
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224 public static boolean toStream(Document document, OutputStream out) {
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diff changeset
225 try {
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226 Transformer transformer =
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227 TransformerFactory.newInstance().newTransformer();
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228 DOMSource source = new DOMSource(document);
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229 StreamResult result = new StreamResult(out);
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230 transformer.transform(source, result);
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231 return true;
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diff changeset
232 }
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diff changeset
233 catch (TransformerConfigurationException tce) {
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234 logger.error(tce.getLocalizedMessage(), tce);
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235 }
b89b31293772 Implemented first things to store/load projects.
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236 catch (TransformerFactoryConfigurationError tfce) {
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237 logger.error(tfce.getLocalizedMessage(), tfce);
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diff changeset
238 }
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diff changeset
239 catch (TransformerException te) {
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diff changeset
240 logger.error(te.getLocalizedMessage(), te);
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241 }
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diff changeset
242
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243 return false;
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244 }
2
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245 }
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246 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org