Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/collections/CollectionDescriptionHelper.java @ 4488:5041105d2edd

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Check if response code from GGInA is 200 OK Only parse the GGInA response if the status code is 200 OK. This improves the error message if GGInA is not available and shows the real reason instead of a JDOM error while parsing the response.
author Björn Ricks <bjoern.ricks@intevation.de>
date Wed, 14 Nov 2012 10:36:21 +0100
parents a5f65e8983be
children
rev   line source
1972
3c3e81fca092 Added a CollectionDescriptionHelper that helps generating DESCRIBE documents for Collections.
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1 package de.intevation.flys.collections;
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2
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3 import java.util.ArrayList;
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4 import java.util.Date;
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5 import java.util.List;
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6
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7 import javax.xml.xpath.XPathConstants;
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8
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9 import org.apache.log4j.Logger;
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10 import org.w3c.dom.Document;
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11 import org.w3c.dom.Element;
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12 import org.w3c.dom.Node;
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13 import org.w3c.dom.NodeList;
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14
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15 import de.intevation.artifacts.ArtifactDatabase;
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16 import de.intevation.artifacts.ArtifactDatabaseException;
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17 import de.intevation.artifacts.ArtifactNamespaceContext;
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18 import de.intevation.artifacts.CallContext;
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19 import de.intevation.artifacts.common.utils.XMLUtils;
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20 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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21
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22
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23 public class CollectionDescriptionHelper {
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24
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25 private static final Logger logger =
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26 Logger.getLogger(CollectionDescriptionHelper.class);
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27
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28
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29 public static final String XPATH_ARTIFACT_STATE_DATA =
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30 "/art:result/art:ui/art:static/art:state/art:data";
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31
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32 /** Constant XPath that points to the outputmodes of an artifact. */
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33 public static final String XPATH_ARTIFACT_OUTPUTMODES =
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34 "/art:result/art:outputmodes";
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35
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36
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37 protected ElementCreator ec;
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38
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39 protected CallContext context;
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40 protected ArtifactDatabase database;
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41
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42 protected String name;
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43 protected String uuid;
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44 protected Date creation;
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45 protected long ttl;
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46
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47 protected List<String> artifacts;
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48 protected CollectionAttribute attribute;
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49
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50
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51 /**
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52 * @param name The name of the collection.
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53 * @param uuid The uuid of the collection.
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54 * @param creation The creation time of the collection.
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55 * @param ttl The time to live of the collection.
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56 */
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57 public CollectionDescriptionHelper(
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58 String name,
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59 String uuid,
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60 Date creation,
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61 long ttl,
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62 CallContext callContext
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63 ) {
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64 this.name = name;
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65 this.uuid = uuid;
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66 this.creation = creation;
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67 this.ttl = ttl;
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68 this.context = callContext;
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69 this.database = callContext.getDatabase();
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70 this.artifacts = new ArrayList<String>();
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71 }
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72
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73
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74 public void addArtifact(String uuid) {
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75 if (uuid != null && uuid.length() > 0) {
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76 artifacts.add(uuid);
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77 }
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78 }
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79
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80
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81 public void setAttribute(CollectionAttribute attribute) {
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82 if (attribute != null) {
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83 this.attribute = attribute;
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84 }
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85 }
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86
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87
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88 public Document toXML() {
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89 Document doc = XMLUtils.newDocument();
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90
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91 ec = new ElementCreator(
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92 doc,
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93 ArtifactNamespaceContext.NAMESPACE_URI,
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94 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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95
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96 Element root = ec.create("artifact-collection");
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97 doc.appendChild(root);
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98
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99 String creationTime = creation != null
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100 ? Long.toString(creation.getTime())
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101 : "";
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102
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103 ec.addAttr(root, "name", name, true);
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104 ec.addAttr(root, "uuid", uuid, true);
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105 ec.addAttr(root, "creation", creationTime, true);
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106 ec.addAttr(root, "ttl", String.valueOf(ttl), true);
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107
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108 appendArtifacts(root);
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109 appendAttribute(root);
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110
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111 return doc;
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112 }
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113
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114
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115 /**
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116 * Appends parts of the DESCRIBE document of each Artifact to <i>root</i>.
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117 *
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118 * @param root The root node.
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119 */
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120 protected void appendArtifacts(Element root) {
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121 Element artifactsEl = ec.create("artifacts");
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122
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123 for (String uuid: artifacts) {
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124 try {
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125 Element e = buildArtifactNode(uuid);
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126
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127 if (e != null) {
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128 artifactsEl.appendChild(e);
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129 }
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130 }
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131 catch (ArtifactDatabaseException dbe) {
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132 logger.warn(dbe, dbe);
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133 }
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134 }
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135
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136 root.appendChild(artifactsEl);
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137 }
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138
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139
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140 /**
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141 * Create the Artifacts Node that contains outputmode and statedata.
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142 *
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143 * @param uuid uuid of the artifact.
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144 */
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145 protected Element buildArtifactNode(String uuid)
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146 throws ArtifactDatabaseException
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147 {
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148 logger.debug("Append artifact '" + uuid + "' to collection description");
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149
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150 // TODO
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151 String hash = "MYHASH";
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152
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153 Element ci = ec.create("artifact");
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154 ec.addAttr(ci, "uuid", uuid, true);
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155 ec.addAttr(ci, "hash", hash, true);
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156
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157 // XXX I am not sure if it works well every time with an empty document
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158 // in the describe operation of an artifact.
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159 Document description = database.describe(uuid, null, context.getMeta());
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160
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161 // Add outputmode element(s).
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162 Node outputModes = (Node) XMLUtils.xpath(
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163 description,
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164 XPATH_ARTIFACT_OUTPUTMODES,
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165 XPathConstants.NODE,
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166 ArtifactNamespaceContext.INSTANCE);
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167
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168 if (outputModes != null) {
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169 Document doc = ci.getOwnerDocument();
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170 ci.appendChild(doc.importNode(outputModes, true));
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171 }
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172
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173 // Add state-data element(s).
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174 Node dataNode = ci.appendChild(
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175 ci.getOwnerDocument().createElement("art:data-items"));
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176
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177 NodeList dataNodes = (NodeList) XMLUtils.xpath(
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178 description,
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179 XPATH_ARTIFACT_STATE_DATA,
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180 XPathConstants.NODESET,
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181 ArtifactNamespaceContext.INSTANCE);
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182
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183 if (dataNodes != null) {
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184 Document doc = ci.getOwnerDocument();
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185 for (int i = 0, D = dataNodes.getLength(); i < D; i++) {
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186 dataNode.appendChild(doc.importNode(dataNodes.item(i), true));
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187 }
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188 }
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189
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190 return ci;
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191 }
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192
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193
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194 protected void appendAttribute(Element root) {
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195 if (attribute != null) {
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196 Document owner = root.getOwnerDocument();
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197 Document attr = attribute.toXML();
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198
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199 root.appendChild(owner.importNode(attr.getFirstChild(), true));
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200 }
1972
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201 }
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202 }
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203 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org