Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/collections/AttributeWriter.java @ 1793:1636686070f7

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Initial commit to support styles in maps. flys-artifacts/trunk@3116 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Fri, 28 Oct 2011 14:42:24 +0000
parents d5d2bffb26ca
children 193a916d1ab5
rev   line source
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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.List;
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5 import java.util.Map;
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6
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7 import org.apache.log4j.Logger;
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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
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13 import de.intevation.artifacts.ArtifactDatabase;
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14 import de.intevation.artifacts.ArtifactDatabaseException;
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15 import de.intevation.artifacts.ArtifactNamespaceContext;
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17 import de.intevation.artifactdatabase.state.Facet;
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18 import de.intevation.artifactdatabase.state.Output;
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19
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20 import de.intevation.artifacts.common.utils.XMLUtils;
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21 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
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22
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23 import de.intevation.flys.artifacts.FLYSArtifact;
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24 import de.intevation.flys.artifacts.model.ManagedFacet;
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26 /**
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27 * Create attribute- element of describe document of an ArtifactCollection.
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28 * The attribute-element contains the merged output of all outputmodes and
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29 * facets that are part of the collection.
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30 */
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31 public class AttributeWriter {
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32
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33 /** ArtifactDatabase used to fetch Artifacts. */
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34 protected ArtifactDatabase db = null;
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35
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36 protected Map<String, Output> oldAttr;
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37
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38 protected Map<String, Output> newAttr;
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39
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40 /** List of already seen facets. */
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41 protected List<Facet> oldFacets;
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42
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43 /** List of "new" facets. */
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44 protected List<Facet> newFacets;
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45
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46 /**
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47 * "Compatibility matrix", mapws list of facet names to output names.
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48 * Any facet that is not found in the list for a specific output will
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49 * not be added to the resulting document.
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50 */
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51 protected Map<String, List<String>> compatibilities;
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52
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53 private static Logger logger = Logger.getLogger(AttributeWriter.class);
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54
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55
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56 /**
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57 * Create a AttributeWriter.
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58 * Attributes not present in newAttr will not be included in the document.
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59 * @param db Database to fetch artifacts.
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60 * @param oldAttr "Old" (possibly user-changed) outputs.
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61 * @param newAttr "New" (eventually re-read in its original, unchanged
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62 * form) outputs.
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63 */
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64 public AttributeWriter(
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65 ArtifactDatabase db,
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66 Map<String, Output> oldAttr,
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67 List<Facet> oldFacets,
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68 Map<String, Output> newAttr,
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69 List<Facet> newFacets,
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70 Map<String, List<String>> matrix)
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71 {
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72 this.db = db;
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73 this.oldAttr = oldAttr;
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74 this.newAttr = newAttr;
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75 this.oldFacets = oldFacets;
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76 this.newFacets = newFacets;
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77 this.compatibilities = matrix;
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78 }
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79
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80
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81 /**
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82 * Create document by merging outputs given in
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83 * constructor.
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84 *
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85 * The "new" set rules about existance of attributes, so anything not
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86 * present in it will not be included in the resulting document.
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87 * The "old" set rules about the content of attributes (as user changes
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88 * are recorded here and not in the new set).
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89 *
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90 * @return document with merged outputs as described.
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91 */
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92 protected Document write() {
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93 Document doc = XMLUtils.newDocument();
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94
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95 ElementCreator cr = new ElementCreator(
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96 doc,
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97 ArtifactNamespaceContext.NAMESPACE_URI,
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98 ArtifactNamespaceContext.NAMESPACE_PREFIX);
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99
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100 Element attribute = cr.create("attribute");
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101 Element outs = cr.create("outputs");
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102
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103 attribute.appendChild(outs);
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104 doc.appendChild(attribute);
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105
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106 for (String outName: newAttr.keySet()) {
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107 Output a = newAttr.get(outName);
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108 Output b = oldAttr.get(outName);
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109
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110 writeOutput(doc, outs, cr, a.getName(), newFacets, oldFacets);
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111 }
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112
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113 return doc;
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114 }
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115
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116
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117 /**
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118 * @param doc Document to add output nodes to
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119 * @param outs Node in Document to add output nodes to
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120 * @param cr ElementCreator in use to modify doc/outs
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121 * @param outputName the "new" outputs name
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122 * @param newOutFacets Facets of the new outputs
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123 * @param oldOutFacets Facets of the old outputs (can be null)
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124 */
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125 protected void writeOutput(
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126 Document doc,
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127 Node outs,
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128 ElementCreator cr,
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129 String outputName,
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130 List<Facet> newOutFacets,
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131 List<Facet> oldOutFacets)
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132 {
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133 Element output = cr.create("output");
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134 cr.addAttr(output, "name", outputName);
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135
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136 outs.appendChild(output);
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137
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138 List<String> compatibleFacets = this.compatibilities.get(outputName);
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139 try {
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140 writeFacets(doc, cr, output, newOutFacets, oldOutFacets, compatibleFacets);
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141 }
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142 catch (ArtifactDatabaseException ade) {
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143 logger.error(ade, ade);
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144 }
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145 }
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146
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147
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148 /**
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149 * @param doc Document to add facet nodes to
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150 * @param cr ElementCreator to use with output/doc
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151 * @param output Node in Document to add facet nodes to
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152 * @param newFacets the new facets
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153 * @param oldFacets the old facets
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154 * @param compatibleFacets List of facets to accept
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155 */
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156 protected void writeFacets(
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157 Document doc,
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158 ElementCreator cr,
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159 Element output,
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160 List<Facet> newFacets,
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161 List<Facet> oldFacets,
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162 List<String> compatibleFacets)
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163 throws ArtifactDatabaseException
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164 {
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165
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166 if (compatibleFacets == null) {
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167 logger.warn("No compatible facets, not generating out.");
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168 return;
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169 }
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170
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171 int num = newFacets.size();
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172
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173 // Add all new Facets either in their old state or (if really
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174 // new) as they are.
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175 List<ManagedFacet> currentFacets = new ArrayList<ManagedFacet>();
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176 List<ManagedFacet> genuinelyNewFacets = new ArrayList<ManagedFacet>();
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177
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178 for (int i = 0; i < num; i++) {
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179 ManagedFacet facet = (ManagedFacet) newFacets.get(i);
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180 if (!compatibleFacets.contains(facet.getName())) {
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181 //logger.debug("Have incompatible facet, skip: " + facet.getName());
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182 continue;
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183 }
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184 //else logger.debug("Have compatible facet: " + facet.getName());
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185
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186 ManagedFacet picked = pickFacet(facet, oldFacets);
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187
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188 if (facet.equals(picked)) {
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189 genuinelyNewFacets.add(picked);
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190 }
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191 else {
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192 currentFacets.add(picked);
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193 }
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194 }
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195
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196 // With each genuinely new Facet, ask Artifact whether it comes to live
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197 // in/activate.
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198 for (ManagedFacet newMF: genuinelyNewFacets) {
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199 FLYSArtifact flys = (FLYSArtifact) db.getRawArtifact(newMF.getArtifact());
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200 newMF.setActive(flys.getInitialFacetActivity(
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201 newMF.getName(),
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202 newMF.getIndex()));
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203 }
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204
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205 // For each genuinely new Facet check positional conflicts.
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206 for (ManagedFacet newMF: genuinelyNewFacets) {
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207 boolean conflicts = true;
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208 // Loop until all conflicts resolved.
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209 while (conflicts) {
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210 conflicts = false;
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211 for (ManagedFacet oldMF: currentFacets) {
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212 if (newMF.getPosition() == oldMF.getPosition()) {
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213 conflicts = true;
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214 logger.debug("Positional conflict while merging " +
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215 "facets, pushing newest facet 1 up (" + newMF.getPosition() + ")");
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216 newMF.setPosition(newMF.getPosition() + 1);
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217 break;
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218 }
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219 }
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220 }
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221 currentFacets.add(newMF);
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222 }
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223
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224 // Now add all facets.
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225 for (ManagedFacet oldMF: currentFacets) {
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226 Node node = oldMF.toXML(doc);
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227 if (node != null) {
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228 output.appendChild(node);
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229 }
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230 }
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231 }
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232
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233
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234 /**
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235 * Returns the facet to be added to Document.
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236 * Return the new facet only if the "same" facet was not present before.
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237 * Return the "old" facet otherwise (user-defined information sticks
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238 * to it).
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239 * @param facet the new facet.
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240 * @param oldFacets the old facets, new facet is compared against each of
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241 * these.
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242 * @return facet if genuinely new, matching old facet otherwise.
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243 */
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244 protected ManagedFacet pickFacet(ManagedFacet facet,
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245 List<Facet> oldFacets)
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246 {
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247 if (oldFacets == null) {
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248 logger.debug("No old facets to compare a new to found.");
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249 return facet;
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250 }
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251
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252 String hash = facet.getName() + facet.getIndex() + facet.getArtifact();
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253
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254 // Compare "new" facet with all old facets.
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255 // Take oldFacet if that facet was already present (otherwise
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256 // information is lost, the new one otherwise.
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257 for (Facet oFacet: oldFacets) {
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258 ManagedFacet oldFacet = (ManagedFacet) oFacet;
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259 String oldHash = oldFacet.getName()
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
diff changeset
260 + oldFacet.getIndex()
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
diff changeset
261 + oldFacet.getArtifact();
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
diff changeset
262 if (hash.equals(oldHash)) {
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
diff changeset
263 return oldFacet;
346
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
264 }
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
265 }
1635
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
diff changeset
266 return facet;
346
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
267 }
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
diff changeset
268 }
705
853dceead0f4 Only generate facets when needed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 694
diff changeset
269 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org