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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/ProtocolUtils.java @ 258:c41b300b02c3

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Improved the ClientProtocolUtils: collections OUT document contains attributes now. artifacts/trunk@1907 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Thu, 12 May 2011 09:06:34 +0000
parents 4bb6bfaca393
children 5ed1afd81569
rev   line source
107
39d9391059bd Added a ProtocolUtils class that provides functions that help creating the artifact protocol documents.
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1 /*
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2 * Copyright (c) 2011 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 package de.intevation.artifactdatabase;
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9
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10 import java.util.List;
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11
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12 import org.w3c.dom.Element;
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13
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14 import de.intevation.artifacts.common.utils.XMLUtils;
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15
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4bb6bfaca393 The output nodes written into the DESCRIBE document by ProtocolUtils have nodes for each facet supported by an output.
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16 import de.intevation.artifactdatabase.state.Facet;
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435631e07da2 Enhanced the ProtocolUtils and ClientProtocolUtils to append and retrieve output modes.
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17 import de.intevation.artifactdatabase.state.Output;
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18 import de.intevation.artifactdatabase.state.State;
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19
107
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20
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21 /**
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22 * This class provides methods that help creating the artifact protocol
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23 * documents describe, feed, advance and out.
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24 *
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25 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
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26 */
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27 public class ProtocolUtils {
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28
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29 /**
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30 * It should not be necessary to create instances of this class.
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31 */
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32 private ProtocolUtils() {}
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33
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34
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35 /**
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36 * This method creates a node that might be used for the artifact protocol.
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37 *
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38 * @param creator The ElementCreator that is used to create the node.
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39 * @param nodeName The node name.
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40 * @param attrName The names of optional attributes.
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41 * @param value The values for the optional attributes.
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42 *
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43 * @return the created node.
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44 */
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45 public static Element createArtNode(
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46 XMLUtils.ElementCreator creator,
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47 String nodeName, String[] attrName, String[] value)
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48 {
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49 Element typeNode = creator.create(nodeName);
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50
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51 if (attrName != null && value != null) {
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52 for (int i = 0; i < attrName.length; i++) {
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53 if (i < value.length) {
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54 creator.addAttr(typeNode, attrName[i], value[i], true);
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55 }
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56 else {
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57 break;
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58 }
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59 }
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60 }
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61
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62 return typeNode;
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63 }
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64
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65
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66 /**
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67 * This method creates the root node for all artifact protocol documents.
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68 *
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69 * @param creator The ElementCreator used to create new elements.
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70 *
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71 * @return the root node for the artifact protocol document.
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72 */
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73 public static Element createRootNode(XMLUtils.ElementCreator creator) {
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74 return createArtNode(creator, "result", null, null);
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75 }
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76
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77
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78 /**
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79 * This method appends the three necessary nodes <i>type</i>, <i>uuid</i>
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80 * and <i>hash</i> of the describe document to <i>root</i> node.
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81 *
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82 * @param creator The ElementCreator that is used to create new nodes.
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83 * @param root The root node of the describe document.
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84 * @param uuid The UUID of the artifact.
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85 * @param hash The hash if the artifact.
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86 */
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87 public static void appendDescribeHeader(
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88 XMLUtils.ElementCreator creator, Element root, String uuid, String hash)
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89 {
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90 root.appendChild(createArtNode(
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91 creator,
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92 "type",
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93 new String[] {"name"},
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94 new String[] {"describe"}));
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95
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96 root.appendChild(createArtNode(
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97 creator,
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98 "uuid",
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99 new String[] {"value"},
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100 new String[] {uuid}));
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101
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102 root.appendChild(createArtNode(
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103 creator,
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104 "hash",
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105 new String[] {"value"},
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106 new String[] {hash}));
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107 }
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108
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109
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110 /**
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111 * This method appends a node that describes the current state to
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112 * <i>root</i>.
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113 *
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114 * @param creator The ElementCreator used to create new elements.
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115 * @param root The parent node for new elements.
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116 * @param state The state to be appended.
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117 */
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118 public static void appendState(
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119 XMLUtils.ElementCreator creator, Element root, State state)
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120 {
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121 root.appendChild(createArtNode(
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122 creator, "state",
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123 new String[] { "description", "name" },
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124 new String[] { state.getDescription(), state.getID() }));
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125 }
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126
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127
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128 /**
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129 * This method appends a node with reachable states to <i>root</i>.
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130 *
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131 * @param creator The ElementCreator used to create new elements.
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132 * @param root The parent node for new elements.
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133 * @param states The reachable states to be appended.
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134 */
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135 public static void appendReachableStates(
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136 XMLUtils.ElementCreator creator,
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137 Element root,
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138 List<State> states)
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139 {
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140 Element reachable = createArtNode(
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141 creator, "reachable-states", null, null);
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142
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143 for (State s: states) {
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144 appendState(creator, reachable, s);
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145 }
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146
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147 root.appendChild(reachable);
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148 }
211
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149
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150
227
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151 /**
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152 * This method appends a node for each Output in the <i>outputs</i> list to
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153 * <i>out</i>. Note: an output node includes its provided facets!
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154 *
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155 * @param creator The ElementCreator used to create new elements.
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156 * @param out The parent node for new elements.
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157 * @param outputs The list of reachable outputs.
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158 */
211
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159 public static void appendOutputModes(
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160 XMLUtils.ElementCreator creator,
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161 Element out,
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162 List<Output> outputs)
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163 {
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164 for (Output o: outputs) {
227
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165 Element newOut = createArtNode(
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166 creator,
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167 "output",
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168 new String[] {"name", "description", "mime-type"},
227
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169 new String[] {o.getName(),o.getDescription(),o.getMimeType()});
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170
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171 Element facets = createArtNode(creator, "facets", null, null);
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172 appendFacets(creator, facets, o.getFacets());
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173
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174 newOut.appendChild(facets);
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175 out.appendChild(newOut);
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176 }
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177 }
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178
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179
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180 /**
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181 * This method appends a node for each Facet in the <i>facets</i> list to
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182 * <i>facet</i>.
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183 *
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184 * @param creator The ElementCreator used to create new elements.
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185 * @param facet The root node for new elements.
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186 * @param facets The list of facets.
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187 */
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188 public static void appendFacets(
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189 XMLUtils.ElementCreator creator,
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190 Element facet,
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191 List<Facet> facets)
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192 {
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193 if (facets == null || facets.size() == 0) {
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194 return;
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195 }
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196
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197 for (Facet f: facets) {
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198 Element newFacet = createArtNode(
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199 creator,
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200 "facet",
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201 new String[] { "name", "description" },
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202 new String[] { f.getName(), f.getDescription() });
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203
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204 facet.appendChild(newFacet);
211
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205 }
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206 }
107
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207 }
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208 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org