Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/collections/AttributeWriter.java @ 1976:0b466bd4ab24

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Introduced a CollectionAttribute class that stores the information provided by the Collection's attribute document. flys-artifacts/trunk@3400 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 13 Dec 2011 11:55:47 +0000
parents 490ab097f58c
children 9c0acaa369ea
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.HashMap;
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6 import java.util.Map;
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7
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8 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
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14 import de.intevation.artifacts.ArtifactDatabase;
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15 import de.intevation.artifacts.ArtifactDatabaseException;
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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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20 import de.intevation.flys.artifacts.FLYSArtifact;
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21 import de.intevation.flys.artifacts.model.ManagedFacet;
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23 /**
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24 * Create attribute- element of describe document of an ArtifactCollection.
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25 * The attribute-element contains the merged output of all outputmodes and
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26 * facets that are part of the collection.
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27 */
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28 public class AttributeWriter {
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29
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30 /** ArtifactDatabase used to fetch Artifacts. */
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31 protected ArtifactDatabase db = null;
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33 protected Map<String, Output> oldAttr;
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35 protected Map<String, Output> newAttr;
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36
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37 /** List of already seen facets. */
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38 protected List<Facet> oldFacets;
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39
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40 /** List of "new" facets. */
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41 protected List<Facet> newFacets;
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42
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43 /**
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44 * "Compatibility matrix", mapws list of facet names to output names.
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45 * Any facet that is not found in the list for a specific output will
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46 * not be added to the resulting document.
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47 */
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48 protected Map<String, List<String>> compatibilities;
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49
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51 /** The result of the <i>write()</i> operation.*/
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52 protected CollectionAttribute attribute;
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54
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55 private static Logger logger = Logger.getLogger(AttributeWriter.class);
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56
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57
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58 /**
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59 * Create a AttributeWriter.
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60 * Attributes not present in newAttr will not be included in the document.
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61 * @param db Database to fetch artifacts.
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62 * @param oldAttr "Old" (possibly user-changed) outputs.
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63 * @param newAttr "New" (eventually re-read in its original, unchanged
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64 * form) outputs.
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65 */
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66 public AttributeWriter(
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67 ArtifactDatabase db,
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68 Map<String, Output> oldAttr,
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69 List<Facet> oldFacets,
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70 Map<String, Output> newAttr,
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71 List<Facet> newFacets,
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72 Map<String, List<String>> matrix)
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73 {
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74 this.db = db;
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75 this.oldAttr = oldAttr;
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76 this.newAttr = newAttr;
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77 this.oldFacets = oldFacets;
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78 this.newFacets = newFacets;
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79 this.compatibilities = matrix;
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80 }
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82
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83 /**
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84 * Create document by merging outputs given in
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85 * constructor.
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86 *
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87 * The "new" set rules about existance of attributes, so anything not
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88 * present in it will not be included in the resulting document.
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89 * The "old" set rules about the content of attributes (as user changes
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90 * are recorded here and not in the new set).
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91 *
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92 * @return document with merged outputs as described.
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93 */
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94 protected CollectionAttribute write() {
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95 attribute = new CollectionAttribute();
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96
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97 for (String outName: newAttr.keySet()) {
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98 Output a = newAttr.get(outName);
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100 attribute.addOutput(a.getName(), a);
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101
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102 writeOutput(a.getName(), newFacets, oldFacets);
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103 }
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104
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105 return attribute;
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106 }
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107
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108
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109 /**
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110 * @param outputName the "new" outputs name
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111 * @param newOutFacets Facets of the new outputs
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112 * @param oldOutFacets Facets of the old outputs (can be null)
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113 */
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114 protected void writeOutput(
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115 String outputName,
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116 List<Facet> newOutFacets,
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117 List<Facet> oldOutFacets
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118 ) {
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119 List<String> compatFacets = this.compatibilities.get(outputName);
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120 try {
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121 writeFacets(outputName, newOutFacets, oldOutFacets, compatFacets);
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122 }
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123 catch (ArtifactDatabaseException ade) {
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124 logger.error(ade, ade);
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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 /**
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130 * @param newFacets the new facets
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131 * @param oldFacets the old facets
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132 * @param compatibleFacets List of facets to accept
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133 * @return true if any facets are written to the out.
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134 */
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135 protected boolean writeFacets(
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136 String outputName,
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137 List<Facet> newFacets,
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138 List<Facet> oldFacets,
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139 List<String> compatibleFacets)
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140 throws ArtifactDatabaseException
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141 {
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142 if (compatibleFacets == null) {
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143 logger.warn("No compatible facets, not generating out.");
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144 return false;
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145 }
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146
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147 int num = newFacets.size();
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148
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149 // Add all new Facets either in their old state or (if really
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150 // new) as they are.
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151 List<ManagedFacet> currentFacets = new ArrayList<ManagedFacet>();
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152 List<ManagedFacet> genuinelyNewFacets = new ArrayList<ManagedFacet>();
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153
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154 for (int i = 0; i < num; i++) {
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155 ManagedFacet facet = (ManagedFacet) newFacets.get(i);
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156 if (!compatibleFacets.contains(facet.getName())) {
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157 //logger.debug("Have incompatible facet, skip: " + facet.getName());
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158 continue;
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159 }
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160 //else logger.debug("Have compatible facet: " + facet.getName());
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161
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162 ManagedFacet picked = pickFacet(facet, oldFacets);
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163
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164 if (facet.equals(picked)) {
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165 genuinelyNewFacets.add(picked);
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166 }
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167 else {
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168 currentFacets.add(picked);
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169 }
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170 }
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171
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172 // With each genuinely new Facet, ask Artifact whether it comes to live
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173 // in/activate.
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174 for (ManagedFacet newMF: genuinelyNewFacets) {
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175 FLYSArtifact flys = (FLYSArtifact) db.getRawArtifact(newMF.getArtifact());
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176 newMF.setActive(flys.getInitialFacetActivity(
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177 outputName,
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178 newMF.getName(),
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179 newMF.getIndex()));
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180 }
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181
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182 // For each genuinely new Facet check positional conflicts.
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183 for (ManagedFacet newMF: genuinelyNewFacets) {
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184 boolean conflicts = true;
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185 // Loop until all conflicts resolved.
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186 while (conflicts) {
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187 conflicts = false;
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188 for (ManagedFacet oldMF: currentFacets) {
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189 if (newMF.getPosition() == oldMF.getPosition()) {
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190 conflicts = true;
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191 logger.debug("Positional conflict while merging " +
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192 "facets, pushing newest facet 1 up (" + newMF.getPosition() + ")");
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193 newMF.setPosition(newMF.getPosition() + 1);
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194 break;
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195 }
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196 }
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197 }
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198 currentFacets.add(newMF);
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199 }
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200
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201 // Fill/correct "gaps" (e.g. position 1,2,5 are taken, after gap filling
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202 // expect positions 1,2,3 [5->3])
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203 // Preparations to be able to detect gaps.
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204 Map<Integer, ManagedFacet> mfmap = new HashMap<Integer, ManagedFacet>();
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205 int max = 0;
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206 for (ManagedFacet mf: currentFacets) {
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207 int pos = mf.getPosition();
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208 mfmap.put(Integer.valueOf(pos), mf);
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209 if (pos > max) max = pos;
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210 }
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211
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212 // Finally do gap correction.
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213 if (max != currentFacets.size()) {
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214 int gap = 0;
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215 for (int i = 1; i <= max; i++) {
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216 ManagedFacet mf = mfmap.get(Integer.valueOf(i));
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217 if (mf == null) {
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218 gap++;
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219 continue;
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220 }
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221 mf.setPosition(mf.getPosition() - gap);
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222 }
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223 }
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224
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225 // Now add all facets.
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226 for (ManagedFacet oldMF: currentFacets) {
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227 attribute.addFacet(outputName, oldMF);
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228 }
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229
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230 return currentFacets.size() > 0;
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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 */
1976
0b466bd4ab24 Introduced a CollectionAttribute class that stores the information provided by the Collection's attribute document.
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244 protected ManagedFacet pickFacet(ManagedFacet facet, List<Facet> oldFacets)
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245 {
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246 if (oldFacets == null) {
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247 logger.debug("No old facets to compare a new to found.");
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248 return facet;
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249 }
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250
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251 String hash = facet.getName() + facet.getIndex() + facet.getArtifact();
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252
1635
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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253 // Compare "new" facet with all old facets.
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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254 // Take oldFacet if that facet was already present (otherwise
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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255 // information is lost, the new one otherwise.
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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256 for (Facet oFacet: oldFacets) {
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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257 ManagedFacet oldFacet = (ManagedFacet) oFacet;
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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258 String oldHash = oldFacet.getName()
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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259 + oldFacet.getIndex()
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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260 + oldFacet.getArtifact();
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Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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261 if (hash.equals(oldHash)) {
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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262 return oldFacet;
346
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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263 }
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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264 }
1635
1b5204203e18 Minor refactoring, documentation.
Felix Wolfsteller <felix.wolfsteller@intevation.de>
parents: 1634
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265 return facet;
346
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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266 }
16161de47662 The Attributes of a collection are written into its DESCRIBE now.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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267 }
705
853dceead0f4 Only generate facets when needed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 694
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268 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org