Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/collections/CollectionDescriptionHelper.java @ 3561:f7e6b35f0b5c
Partly reverted Double->double change of clins.
flys-artifacts/trunk@5158 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sun, 29 Jul 2012 16:04:40 +0000 |
parents | 4a76da133144 |
children | a5f65e8983be |
rev | line source |
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1972
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Added a CollectionDescriptionHelper that helps generating DESCRIBE documents for Collections.
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parents:
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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.w3c.dom.Document; |
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10 import org.w3c.dom.Element; |
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11 import org.w3c.dom.Node; |
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12 import org.w3c.dom.NodeList; |
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13 |
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14 import org.apache.log4j.Logger; |
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15 |
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16 import de.intevation.artifacts.ArtifactDatabase; |
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17 import de.intevation.artifacts.ArtifactDatabaseException; |
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18 import de.intevation.artifacts.ArtifactNamespaceContext; |
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19 import de.intevation.artifacts.CallContext; |
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20 |
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21 import de.intevation.artifacts.common.utils.XMLUtils; |
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22 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; |
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23 |
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24 |
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25 public class CollectionDescriptionHelper { |
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26 |
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27 private static final Logger logger = |
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28 Logger.getLogger(CollectionDescriptionHelper.class); |
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29 |
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30 |
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31 public static final String XPATH_ARTIFACT_STATE_DATA = |
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32 "/art:result/art:ui/art:static/art:state/art:data"; |
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33 |
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34 /** Constant XPath that points to the outputmodes of an artifact. */ |
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35 public static final String XPATH_ARTIFACT_OUTPUTMODES = |
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36 "/art:result/art:outputmodes"; |
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37 |
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38 |
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39 protected ElementCreator ec; |
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40 |
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41 protected CallContext context; |
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42 protected ArtifactDatabase database; |
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43 |
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44 protected String name; |
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45 protected String uuid; |
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46 protected Date creation; |
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47 protected long ttl; |
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48 |
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49 protected List<String> artifacts; |
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50 protected CollectionAttribute attribute; |
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51 |
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52 |
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53 /** |
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54 * @param name The name of the collection. |
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55 * @param uuid The uuid of the collection. |
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56 * @param creation The creation time of the collection. |
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57 * @param ttl The time to live of the collection. |
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58 */ |
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59 public CollectionDescriptionHelper( |
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60 String name, |
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61 String uuid, |
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62 Date creation, |
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63 long ttl, |
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64 CallContext callContext |
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65 ) { |
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66 this.name = name; |
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67 this.uuid = uuid; |
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68 this.creation = creation; |
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69 this.ttl = ttl; |
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70 this.context = callContext; |
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71 this.database = callContext.getDatabase(); |
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72 } |
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73 |
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74 |
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75 public void addArtifact(String uuid) { |
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76 if (artifacts == null) { |
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77 artifacts = new ArrayList<String>(); |
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78 } |
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79 |
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80 if (uuid != null && uuid.length() > 0) { |
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81 artifacts.add(uuid); |
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82 } |
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83 } |
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84 |
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85 |
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86 public void setAttribute(CollectionAttribute attribute) { |
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87 if (attribute != null) { |
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88 this.attribute = attribute; |
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89 } |
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90 } |
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91 |
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92 |
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93 public Document toXML() { |
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94 Document doc = XMLUtils.newDocument(); |
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95 |
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96 ec = new ElementCreator( |
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97 doc, |
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98 ArtifactNamespaceContext.NAMESPACE_URI, |
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99 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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100 |
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101 Element root = ec.create("artifact-collection"); |
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102 doc.appendChild(root); |
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103 |
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104 String creationTime = creation != null |
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105 ? Long.toString(creation.getTime()) |
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106 : ""; |
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107 |
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108 ec.addAttr(root, "name", name, true); |
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109 ec.addAttr(root, "uuid", uuid, true); |
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110 ec.addAttr(root, "creation", creationTime, true); |
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111 ec.addAttr(root, "ttl", String.valueOf(ttl), true); |
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112 |
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113 appendArtifacts(root); |
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114 appendAttribute(root); |
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115 |
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116 return doc; |
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117 } |
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118 |
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119 |
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120 /** |
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121 * Appends parts of the DESCRIBE document of each Artifact to <i>root</i>. |
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122 * |
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123 * @param root The root node. |
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124 */ |
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125 protected void appendArtifacts(Element root) { |
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126 Element artifactsEl = ec.create("artifacts"); |
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127 |
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128 for (String uuid: artifacts) { |
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129 try { |
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130 Element e = buildArtifactNode(uuid); |
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131 |
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132 if (e != null) { |
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133 artifactsEl.appendChild(e); |
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134 } |
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135 } |
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136 catch (ArtifactDatabaseException dbe) { |
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137 logger.warn(dbe, dbe); |
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138 } |
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139 } |
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140 |
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141 root.appendChild(artifactsEl); |
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142 } |
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143 |
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144 |
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145 /** |
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146 * Create the Artifacts Node that contains outputmode and statedata. |
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147 * |
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148 * @param uuid uuid of the artifact. |
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149 */ |
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150 protected Element buildArtifactNode(String uuid) |
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151 throws ArtifactDatabaseException |
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152 { |
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153 logger.debug("Append artifact '" + uuid + "' to collection description"); |
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154 |
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155 // TODO |
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156 String hash = "MYHASH"; |
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157 |
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158 Element ci = ec.create("artifact"); |
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159 ec.addAttr(ci, "uuid", uuid, true); |
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160 ec.addAttr(ci, "hash", hash, true); |
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161 |
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162 // XXX I am not sure if it works well every time with an empty document |
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163 // in the describe operation of an artifact. |
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164 Document description = database.describe(uuid, null, context.getMeta()); |
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165 |
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166 // Add outputmode element(s). |
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167 Node outputModes = (Node) XMLUtils.xpath( |
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168 description, |
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169 XPATH_ARTIFACT_OUTPUTMODES, |
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170 XPathConstants.NODE, |
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171 ArtifactNamespaceContext.INSTANCE); |
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172 |
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173 if (outputModes != null) { |
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174 Document doc = ci.getOwnerDocument(); |
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175 ci.appendChild(doc.importNode(outputModes, true)); |
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176 } |
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177 |
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178 // Add state-data element(s). |
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179 Node dataNode = ci.appendChild( |
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180 ci.getOwnerDocument().createElement("art:data-items")); |
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181 |
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182 NodeList dataNodes = (NodeList) XMLUtils.xpath( |
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183 description, |
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184 XPATH_ARTIFACT_STATE_DATA, |
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185 XPathConstants.NODESET, |
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186 ArtifactNamespaceContext.INSTANCE); |
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187 |
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188 if (dataNodes != null) { |
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189 Document doc = ci.getOwnerDocument(); |
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190 for (int i = 0, D = dataNodes.getLength(); i < D; i++) { |
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191 dataNode.appendChild(doc.importNode(dataNodes.item(i), true)); |
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192 } |
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193 } |
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194 |
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195 return ci; |
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196 } |
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197 |
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198 |
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199 protected void appendAttribute(Element root) { |
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200 Document owner = root.getOwnerDocument(); |
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201 Document attr = attribute.toXML(); |
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202 |
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203 root.appendChild(owner.importNode(attr.getFirstChild(), true)); |
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204 } |
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205 } |
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206 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |