Mercurial > dive4elements > framework
annotate artifacts-common/src/main/java/org/dive4elements/artifacts/common/utils/XMLUtils.java @ 549:e781b847fdca 3.2.2
Added new File/NS-aware/Entity-Resolver signature for XMLUtils.parseDocument.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Mon, 22 Feb 2016 17:25:21 +0100 |
parents | f099f0b22e62 |
children | 584591f8203c |
rev | line source |
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1 /* |
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2 * Copyright (c) 2010 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 |
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9 package org.dive4elements.artifacts.common.utils; |
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10 |
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11 import java.util.List; |
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12 import java.util.ArrayList; |
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13 import java.util.Map; |
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14 import java.util.LinkedHashMap; |
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15 import java.util.zip.GZIPInputStream; |
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16 import java.util.zip.GZIPOutputStream; |
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17 |
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18 import java.io.ByteArrayInputStream; |
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19 import java.io.FileInputStream; |
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20 import java.io.BufferedInputStream; |
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21 import java.io.ByteArrayOutputStream; |
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22 import java.io.File; |
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23 import java.io.FileReader; |
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24 import java.io.IOException; |
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25 import java.io.InputStream; |
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26 import java.io.OutputStream; |
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27 import java.io.StringWriter; |
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28 |
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29 import javax.xml.namespace.NamespaceContext; |
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30 import javax.xml.namespace.QName; |
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31 |
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32 import javax.xml.parsers.DocumentBuilderFactory; |
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33 import javax.xml.parsers.DocumentBuilder; |
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34 import javax.xml.parsers.ParserConfigurationException; |
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35 |
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36 import javax.xml.transform.Transformer; |
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37 import javax.xml.transform.TransformerConfigurationException; |
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38 import javax.xml.transform.TransformerException; |
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39 import javax.xml.transform.TransformerFactory; |
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40 import javax.xml.transform.TransformerFactoryConfigurationError; |
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41 |
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42 import javax.xml.transform.dom.DOMSource; |
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43 |
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44 import javax.xml.transform.stream.StreamResult; |
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45 |
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46 import javax.xml.xpath.XPath; |
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47 import javax.xml.xpath.XPathConstants; |
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48 import javax.xml.xpath.XPathExpressionException; |
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49 import javax.xml.xpath.XPathFactory; |
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50 import javax.xml.xpath.XPathVariableResolver; |
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51 |
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52 import org.apache.log4j.Logger; |
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53 |
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54 import org.w3c.dom.Attr; |
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55 import org.w3c.dom.Document; |
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56 import org.w3c.dom.Element; |
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57 import org.w3c.dom.Node; |
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58 |
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59 import org.xml.sax.SAXException; |
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60 import org.xml.sax.EntityResolver; |
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61 import org.xml.sax.InputSource; |
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62 |
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63 |
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64 /** |
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65 * Some helper functions to ease work with XML concering namespaces, XPATH |
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66 * and so on. |
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67 * @author <a href="mailto:sascha.teichmann@intevation.de">Sascha L. Teichmann</a> |
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68 */ |
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69 public final class XMLUtils |
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70 { |
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71 /** W3C URL of XForms. */ |
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72 public static final String XFORM_URL = "http://www.w3.org/2002/xforms"; |
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73 |
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74 /** W3C prefix of XForms. */ |
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75 public static final String XFORM_PREFIX = "xform"; |
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76 |
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77 /** Logger for this class. */ |
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78 private static Logger logger = Logger.getLogger(XMLUtils.class); |
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79 |
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80 private XMLUtils() { |
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81 } |
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82 |
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83 /** |
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84 * Helper class to generate elements and attributes with |
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85 * namespaces. |
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86 */ |
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87 public static class ElementCreator |
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88 { |
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89 /** Owner document of the elements to be created. */ |
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90 protected Document document; |
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91 |
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92 /** Namespace to be used. */ |
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93 protected String ns; |
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94 |
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95 /** Prefix to be used. */ |
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96 protected String prefix; |
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97 |
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98 /** |
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99 * Constructor to create an element/attribute creator |
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100 * with a given namespace and namespace prefix using a |
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101 * given owner document. |
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102 * @param document The owning document |
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103 * @param ns The namespace |
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104 * @param prefix The namespace prefix |
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105 */ |
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106 public ElementCreator(Document document, String ns, String prefix) { |
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107 this.document = document; |
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108 this.ns = ns; |
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109 this.prefix = prefix; |
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110 } |
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111 |
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112 /** |
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113 * Creates a new element using the owning document with |
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114 * the this creators namespace and namespace prefix. |
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115 * @param name The name of the element |
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116 * @return The new element |
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117 */ |
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118 public Element create(String name) { |
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119 Element element = document.createElementNS(ns, name); |
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120 element.setPrefix(prefix); |
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121 return element; |
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122 } |
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123 |
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124 /** |
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125 * Adds a new attribute and its value to a given element. |
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126 * It does not set the namespace prefix. |
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127 * @param element The element to add the attribute to |
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128 * @param name The name of the attribute |
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129 * @param value The value of the attribute |
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130 */ |
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131 public void addAttr(Element element, String name, String value) { |
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132 addAttr(element, name, value, false); |
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133 } |
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134 |
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135 /** |
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136 * Adds a new attribute and its value to a given element. |
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137 * If the namespace prefix is used is decided by the 'addPrefix' flag. |
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138 * @param element The element to add the attribute to |
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139 * @param name The name of the attribute |
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140 * @param value The value of the attribute |
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141 * @param addPrefix If true the creators namespace prefix is |
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142 * set on the attribute. |
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143 */ |
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144 public void addAttr( |
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145 Element element, |
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146 String name, |
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147 String value, |
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148 boolean addPrefix |
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149 ) { |
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150 if (addPrefix) { |
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151 Attr attr = document.createAttributeNS(ns, name); |
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152 attr.setValue(value); |
102
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153 attr.setPrefix(prefix); |
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154 |
202
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155 element.setAttributeNode(attr); |
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156 } |
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157 else { |
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158 element.setAttribute(name, value); |
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159 } |
102
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160 } |
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161 } // class ElementCreator |
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162 |
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163 /** |
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164 * Resolver for entities in artifacts configuration. |
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165 */ |
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166 public static final EntityResolver CONF_RESOLVER = new EntityResolver() { |
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167 @Override |
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168 public InputSource resolveEntity( |
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169 String publicId, |
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170 String systemId |
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171 ) throws SAXException, IOException { |
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172 return new InputSource( |
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173 new FileReader(Config.replaceConfigDir(systemId))); |
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174 } |
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175 }; |
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176 |
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177 |
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178 /** |
102
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179 * Creates a new XML document |
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180 * @return the new XML document ot null if something went wrong during |
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181 * creation. |
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182 */ |
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183 public static final Document newDocument() { |
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184 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); |
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185 factory.setNamespaceAware(true); |
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186 |
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187 try { |
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188 return factory.newDocumentBuilder().newDocument(); |
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189 } |
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190 catch (ParserConfigurationException pce) { |
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191 logger.error(pce.getLocalizedMessage(), pce); |
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192 } |
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193 return null; |
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194 } |
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195 |
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196 |
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197 /** |
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198 * Create xml/string representation of element (nested in otherwise empty |
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199 * document). |
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200 * @param element element to inspect in string. |
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201 * @return string with xml representation of element. |
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202 */ |
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203 public final static String toString(Node node) { |
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204 Document doc = newDocument(); |
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205 doc.appendChild(doc.importNode(node,true)); |
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206 return toString(doc); |
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207 } |
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208 |
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209 |
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210 /** |
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211 * Loads a XML document namespace aware from a file |
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212 * @param file The file to load. |
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213 * @return the XML document or null if something went wrong |
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214 * during loading. |
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215 */ |
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216 public static final Document parseDocument(File file) { |
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217 InputStream inputStream = null; |
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218 try { |
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219 inputStream = new BufferedInputStream(new FileInputStream(file)); |
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220 return parseDocument(inputStream); |
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221 } |
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222 catch (IOException ioe) { |
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223 logger.error(ioe.getLocalizedMessage(), ioe); |
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224 } |
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225 finally { |
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226 if (inputStream != null) { |
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227 try { inputStream.close(); } |
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228 catch (IOException ioe) {} |
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229 } |
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230 } |
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231 return null; |
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232 } |
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233 |
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234 /** |
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235 * Parses a String to a xml document. |
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236 * |
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237 * @param string The xml string |
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238 * @return the XML document or null if something went wrong. |
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239 */ |
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240 public static final Document parseDocument(String string) { |
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241 InputStream inputStream = new ByteArrayInputStream(string.getBytes()); |
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242 return parseDocument(inputStream); |
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243 } |
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244 |
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245 |
147
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246 public static final Document parseDocument(InputStream inputStream) { |
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247 return parseDocument(inputStream, Boolean.TRUE); |
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248 } |
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249 |
350
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250 public static final Document parseDocument( |
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251 InputStream inputStream, |
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252 Boolean namespaceAware |
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253 ) { |
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254 return parseDocument( |
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255 inputStream, namespaceAware, CONF_RESOLVER); |
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256 } |
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257 |
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258 public static final Document parseDocument( |
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259 File file, |
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260 Boolean namespaceAware, |
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261 EntityResolver entityResolver |
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262 ) { |
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263 InputStream inputStream = null; |
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264 try { |
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265 inputStream = new BufferedInputStream(new FileInputStream(file)); |
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266 return parseDocument(inputStream, namespaceAware, entityResolver); |
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267 } |
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268 catch (IOException ioe) { |
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269 logger.error(ioe.getLocalizedMessage(), ioe); |
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270 } |
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271 finally { |
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272 if (inputStream != null) { |
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273 try { inputStream.close(); } |
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274 catch (IOException ioe) {} |
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275 } |
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276 } |
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277 return null; |
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278 } |
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279 |
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280 public static final Document parseDocument( |
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281 InputStream inputStream, |
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282 Boolean namespaceAware, |
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283 EntityResolver entityResolver |
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284 ) { |
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285 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); |
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286 |
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287 if (namespaceAware != null) { |
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288 factory.setNamespaceAware(namespaceAware.booleanValue()); |
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289 } |
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290 |
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291 try { |
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292 DocumentBuilder builder = factory.newDocumentBuilder(); |
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293 builder.setEntityResolver(entityResolver); |
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294 return builder.parse(inputStream); |
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295 } |
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296 catch (ParserConfigurationException pce) { |
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297 logger.error(pce.getLocalizedMessage(), pce); |
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298 } |
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299 catch (SAXException se) { |
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300 logger.error(se.getLocalizedMessage(), se); |
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301 } |
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302 catch (IOException ioe) { |
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303 logger.error(ioe.getLocalizedMessage(), ioe); |
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304 } |
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305 return null; |
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306 } |
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307 |
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308 /** |
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309 * Creates a new XPath without a namespace context. |
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310 * @return the new XPath. |
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311 */ |
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312 public static final XPath newXPath() { |
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313 return newXPath(null, null); |
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314 } |
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315 |
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316 /** |
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317 * Creates a new XPath with a given namespace context. |
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318 * @param namespaceContext The namespace context to be used or null |
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319 * if none should be used. |
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320 * @return The new XPath |
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321 */ |
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322 public static final XPath newXPath( |
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323 NamespaceContext namespaceContext, |
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324 XPathVariableResolver resolver) |
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325 { |
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326 XPathFactory factory = XPathFactory.newInstance(); |
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327 XPath xpath = factory.newXPath(); |
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328 if (namespaceContext != null) { |
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329 xpath.setNamespaceContext(namespaceContext); |
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330 } |
323
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331 |
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332 if (resolver != null) { |
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333 xpath.setXPathVariableResolver(resolver); |
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334 } |
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335 return xpath; |
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336 } |
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337 |
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338 /** |
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339 * Evaluates an XPath query on a given object and returns the result |
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340 * as a given type. No namespace context is used. |
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341 * @param root The object which is used as the root of the tree to |
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342 * be searched in. |
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343 * @param query The XPath query |
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344 * @param returnTyp The type of the result. |
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345 * @return The result of type 'returnTyp' or null if something |
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346 * went wrong during XPath evaluation. |
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347 */ |
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348 public static final Object xpath( |
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349 Object root, |
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350 String query, |
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351 QName returnTyp |
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352 ) { |
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353 return xpath(root, query, returnTyp, null); |
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354 } |
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355 |
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356 /** |
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357 * Evaluates an XPath query on a given object and returns the result |
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358 * as a string. A given namespace context is used. |
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359 * @param root The object which is used as the root of the tree to |
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360 * be searched in. |
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361 * @param query The XPath query |
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362 * @param namespaceContext The namespace context to be used or null |
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363 * if none should be used. |
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364 * @return The result of the query or null if something went wrong |
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365 * during XPath evaluation. |
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366 */ |
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367 public static final String xpathString( |
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368 Object root, String query, NamespaceContext namespaceContext |
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369 ) { |
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370 return (String)xpath( |
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371 root, query, XPathConstants.STRING, namespaceContext); |
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372 } |
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373 |
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374 /** |
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375 * Evaluates an XPath query on a given object and returns the result |
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376 * as a given type. Optionally a namespace context is used. |
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377 * @param root The object which is used as the root of the tree to |
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378 * be searched in. |
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379 * @param query The XPath query |
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380 * @param returnType The type of the result. |
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381 * @param namespaceContext The namespace context to be used or null |
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382 * if none should be used. |
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383 * @return The result of type 'returnTyp' or null if something |
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384 * went wrong during XPath evaluation. |
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385 */ |
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386 public static final Object xpath( |
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387 Object root, |
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388 String query, |
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389 QName returnType, |
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390 NamespaceContext namespaceContext |
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391 ) { |
323
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392 return xpath(root, query, returnType, namespaceContext, null); |
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393 } |
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394 |
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395 public static final Object xpath( |
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396 Object root, |
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397 String query, |
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398 QName returnType, |
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399 NamespaceContext namespaceContext, |
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400 Map<String, String> variables) |
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401 { |
102
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402 if (root == null) { |
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403 return null; |
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404 } |
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405 |
323
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406 XPathVariableResolver resolver = variables != null |
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407 ? new MapXPathVariableResolver(variables) |
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408 : null; |
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409 |
102
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410 try { |
323
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411 XPath xpath = newXPath(namespaceContext, resolver); |
102
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412 if (xpath != null) { |
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413 return xpath.evaluate(query, root, returnType); |
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414 } |
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415 } |
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416 catch (XPathExpressionException xpee) { |
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417 logger.error(xpee.getLocalizedMessage(), xpee); |
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418 } |
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419 |
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420 return null; |
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421 } |
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422 |
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423 /** |
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424 * Streams out an XML document to a given output stream. |
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425 * @param document The document to be streamed out. |
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426 * @param out The output stream to be used. |
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427 * @return true if operation succeeded else false. |
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428 */ |
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429 public static boolean toStream(Document document, OutputStream out) { |
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430 try { |
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431 Transformer transformer = |
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432 TransformerFactory.newInstance().newTransformer(); |
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433 DOMSource source = new DOMSource(document); |
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434 StreamResult result = new StreamResult(out); |
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435 transformer.transform(source, result); |
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436 return true; |
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437 } |
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438 catch (TransformerConfigurationException tce) { |
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439 logger.error(tce.getLocalizedMessage(), tce); |
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440 } |
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441 catch (TransformerFactoryConfigurationError tfce) { |
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442 logger.error(tfce.getLocalizedMessage(), tfce); |
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443 } |
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444 catch (TransformerException te) { |
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445 logger.error(te.getLocalizedMessage(), te); |
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446 } |
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447 |
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448 return false; |
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449 } |
135
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450 |
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451 public static String toString(Document document) { |
276
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452 try { |
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453 Transformer transformer = |
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454 TransformerFactory.newInstance().newTransformer(); |
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455 DOMSource source = new DOMSource(document); |
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456 StringWriter out = new StringWriter(); |
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457 StreamResult result = new StreamResult(out); |
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458 transformer.transform(source, result); |
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459 out.flush(); |
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460 return out.toString(); |
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461 } |
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462 catch (TransformerConfigurationException tce) { |
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463 logger.error(tce.getLocalizedMessage(), tce); |
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464 } |
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465 catch (TransformerFactoryConfigurationError tfce) { |
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466 logger.error(tfce.getLocalizedMessage(), tfce); |
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467 } |
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468 catch (TransformerException te) { |
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469 logger.error(te.getLocalizedMessage(), te); |
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470 } |
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471 |
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472 return null; |
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473 } |
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474 |
234
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475 public static byte [] toByteArray(Document document) { |
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476 return toByteArray(document, false); |
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477 } |
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478 |
135
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479 /** |
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480 * Transforms an XML document into a byte array. |
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481 * @param document The document to be streamed out. |
234
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482 * @param compress The document should be compressed, too. |
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483 * @return the byte array or null if operation failed or |
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484 * document is null. |
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485 */ |
234
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486 public static byte [] toByteArray(Document document, boolean compress) { |
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487 if (document != null) { |
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488 try { |
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489 ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
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490 OutputStream out = compress |
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491 ? new GZIPOutputStream(baos) |
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492 : baos; |
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493 boolean success = toStream(document, out); |
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494 out.flush(); |
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495 out.close(); |
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496 return success |
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497 ? baos.toByteArray() |
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498 : null; |
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499 } |
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500 catch (IOException ioe) { |
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Added a boolean flag to XML byte serialisation to compress/decompress, too.
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501 logger.error(ioe); |
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Added a boolean flag to XML byte serialisation to compress/decompress, too.
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502 } |
135
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Added a convinience method to transform an document into a byte array.
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503 } |
234
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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504 return null; |
135
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Added a convinience method to transform an document into a byte array.
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505 } |
147
9a64e0c1c737
Added code to load user from database.
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506 |
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Added code to load user from database.
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507 public static Document fromByteArray(byte [] data) { |
234
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Added a boolean flag to XML byte serialisation to compress/decompress, too.
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508 return fromByteArray(data, false); |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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509 } |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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changeset
|
510 |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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511 public static Document fromByteArray(byte [] data, boolean decompress) { |
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Added a boolean flag to XML byte serialisation to compress/decompress, too.
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512 if (data != null) { |
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Added a boolean flag to XML byte serialisation to compress/decompress, too.
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513 InputStream in = new ByteArrayInputStream(data); |
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Added a boolean flag to XML byte serialisation to compress/decompress, too.
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514 try { |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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515 if (decompress) { |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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|
516 in = new GZIPInputStream(in); |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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517 } |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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518 return parseDocument(in); |
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Added a boolean flag to XML byte serialisation to compress/decompress, too.
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519 } |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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520 catch (IOException ioe) { |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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521 logger.error(ioe); |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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522 } |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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523 finally { |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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|
524 try { |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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525 in.close(); |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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|
526 } |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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changeset
|
527 catch (IOException ioe) { |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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|
528 logger.error(ioe); |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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|
529 } |
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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diff
changeset
|
530 } |
147
9a64e0c1c737
Added code to load user from database.
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|
531 } |
234
23d642319a0b
Added a boolean flag to XML byte serialisation to compress/decompress, too.
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changeset
|
532 return null; |
147
9a64e0c1c737
Added code to load user from database.
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diff
changeset
|
533 } |
381
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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parents:
367
diff
changeset
|
534 |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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parents:
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changeset
|
535 private static class BuildResult { |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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|
536 List<Node> children; |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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changeset
|
537 Map<String, String> attributes; |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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changeset
|
538 BuildResult() { |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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changeset
|
539 children = new ArrayList<Node>(); |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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|
540 attributes = new LinkedHashMap<String, String>(); |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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parents:
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changeset
|
541 } |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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diff
changeset
|
542 |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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changeset
|
543 void setAttributes(Element element) { |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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changeset
|
544 for (Map.Entry<String, String> entry: attributes.entrySet()) { |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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changeset
|
545 element.setAttribute(entry.getKey(), entry.getValue()); |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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parents:
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diff
changeset
|
546 } |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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diff
changeset
|
547 } |
384
823752e3d392
Fixed building XML documents from JSON strings.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
381
diff
changeset
|
548 |
823752e3d392
Fixed building XML documents from JSON strings.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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diff
changeset
|
549 void finish(Element element) { |
823752e3d392
Fixed building XML documents from JSON strings.
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diff
changeset
|
550 setAttributes(element); |
823752e3d392
Fixed building XML documents from JSON strings.
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parents:
381
diff
changeset
|
551 for (Node child: children) { |
823752e3d392
Fixed building XML documents from JSON strings.
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diff
changeset
|
552 element.appendChild(child); |
823752e3d392
Fixed building XML documents from JSON strings.
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parents:
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diff
changeset
|
553 } |
823752e3d392
Fixed building XML documents from JSON strings.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
381
diff
changeset
|
554 } |
823752e3d392
Fixed building XML documents from JSON strings.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
381
diff
changeset
|
555 |
381
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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changeset
|
556 void add(Node node) { |
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Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
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557 children.add(node); |
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558 } |
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559 |
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560 void add(String key, Object value) { |
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561 attributes.put(key, value != null ? value.toString() : "null"); |
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562 } |
392
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563 |
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564 int numChildren() { |
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565 return children.size(); |
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566 } |
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567 |
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568 Node firstChild() { |
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569 return children.get(0); |
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570 } |
381
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571 } // class BuildResult |
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572 |
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573 private static BuildResult recursiveBuild( |
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574 List list, |
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575 Document document |
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576 ) { |
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577 BuildResult result = new BuildResult(); |
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578 for (Object entry: list) { |
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579 if (entry instanceof Map) { |
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580 BuildResult subResult = recursiveBuild( |
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581 (Map<String, Object>)entry, document); |
392
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582 if (subResult.numChildren() == 1) { |
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583 result.add(subResult.firstChild()); |
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584 } |
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585 else { |
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586 Element element = document.createElement("map"); |
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587 subResult.finish(element); |
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588 result.add(element); |
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589 } |
381
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590 } |
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591 else if (entry instanceof List) { |
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592 Element element = document.createElement("list"); |
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593 BuildResult subResult = recursiveBuild((List)entry, document); |
384
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594 subResult.finish(element); |
381
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595 result.add(element); |
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596 } |
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597 else { |
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598 Element element = document.createElement("entry"); |
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599 element.setAttribute( |
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600 "value", |
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601 entry != null ? entry.toString() : "null"); |
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602 } |
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603 } |
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604 return result; |
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605 } |
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606 |
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607 private static BuildResult recursiveBuild( |
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608 Map<String, Object> map, |
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609 Document document |
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610 ) { |
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611 BuildResult result = new BuildResult(); |
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612 |
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613 List<Node> nodes = new ArrayList<Node>(); |
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614 for (Map.Entry<String, Object> entry: map.entrySet()) { |
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615 Object value = entry.getValue(); |
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616 if (value instanceof Map) { |
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617 Element element = document.createElement(entry.getKey()); |
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618 BuildResult subResult = recursiveBuild( |
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619 (Map<String, Object>)value, document); |
384
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620 subResult.finish(element); |
381
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621 result.add(element); |
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622 } |
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623 else if (value instanceof List) { |
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624 Element element = document.createElement(entry.getKey()); |
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625 BuildResult subResult = recursiveBuild((List)value, document); |
384
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Fixed building XML documents from JSON strings.
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626 subResult.finish(element); |
381
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627 result.add(element); |
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628 } |
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629 else { |
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630 result.add(entry.getKey(), value); |
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631 } |
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632 } |
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633 return result; |
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634 } |
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635 |
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636 public static Document jsonToXML(String input) { |
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637 Document document = newDocument(); |
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638 |
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639 if (document == null) { |
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640 return null; |
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641 } |
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642 |
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643 Map<String, Object> map; |
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644 try { |
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645 map = JSON.parse(input); |
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646 } |
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647 catch (IOException ioe) { |
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648 logger.error(ioe); |
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649 return null; |
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650 } |
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651 |
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652 BuildResult roots = recursiveBuild(map, document); |
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653 |
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654 int N = roots.children.size(); |
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655 |
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656 if (N == 1) { |
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657 document.appendChild(roots.children.get(0)); |
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658 } |
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659 else if (N > 1) { |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
660 Node root = document.createElement("root"); |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
661 for (int i = 0; i < N; ++i) { |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
662 root.appendChild(roots.children.get(i)); |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
663 } |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
664 document.appendChild(root); |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
665 } |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
666 |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
667 return document; |
bed51de8ae58
Added JSON parser from Artefact Server NG to bridge from JSON to XML speaking services.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
367
diff
changeset
|
668 } |
102
4122dbc9711b
Added a new package artifacts-common for classes and utilities used in several packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff
changeset
|
669 } |
4122dbc9711b
Added a new package artifacts-common for classes and utilities used in several packages.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff
changeset
|
670 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |