Mercurial > dive4elements > river

annotate artifacts/src/main/java/org/dive4elements/river/collections/AttributeWriter.java @ 5863:4897a58c8746

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River artifacts: Added new copyright headers.
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 28 Apr 2013 14:40:59 +0200
parents 5aa05a7a34b7
children 59ff03ff48f1
rev   line source
5863
4897a58c8746 River artifacts: Added new copyright headers.
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1 /* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU AGPL (>=v3)
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5 * and comes with ABSOLUTELY NO WARRANTY! Check out the
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6 * documentation coming with Dive4Elements River for details.
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7 */
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8
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9 package org.dive4elements.river.collections;
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10
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11 import java.util.ArrayList;
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12 import java.util.List;
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13 import java.util.HashMap;
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14 import java.util.Map;
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15
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16 import org.apache.log4j.Logger;
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17
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18 import org.dive4elements.artifacts.ArtifactDatabase;
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19 import org.dive4elements.artifacts.ArtifactDatabaseException;
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20
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21 import org.dive4elements.artifactdatabase.state.Facet;
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22 import org.dive4elements.artifactdatabase.state.FacetActivity;
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23 import org.dive4elements.artifactdatabase.state.Output;
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24
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25 import org.dive4elements.river.artifacts.FLYSArtifact;
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26 import org.dive4elements.river.artifacts.model.ManagedFacet;
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27
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28 /**
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29 * Create attribute- element of describe document of an ArtifactCollection.
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30 * The attribute-element contains the merged output of all outputmodes and
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31 * facets that are part of the collection.
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32 */
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33 public class AttributeWriter {
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34
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35 /** ArtifactDatabase used to fetch Artifacts. */
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36 protected ArtifactDatabase db = null;
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37
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38 protected Map<String, Output> oldAttr;
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39
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40 protected Map<String, Output> newAttr;
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41
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42 /** List of already seen facets. */
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43 protected List<Facet> oldFacets;
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44
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45 /** List of "new" facets. */
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46 protected List<Facet> newFacets;
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47
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48 /**
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49 * "Compatibility matrix", mapws list of facet names to output names.
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50 * Any facet that is not found in the list for a specific output will
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51 * not be added to the resulting document.
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52 */
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53 protected Map<String, List<String>> compatibilities;
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54
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55
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56 /** The result of the <i>write()</i> operation.*/
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57 protected CollectionAttribute attribute;
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58
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59
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60 private static Logger logger = Logger.getLogger(AttributeWriter.class);
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61
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62
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63 /**
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64 * Create a AttributeWriter.
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65 * Attributes not present in newAttr will not be included in the document.
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66 * @param db Database to fetch artifacts.
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67 * @param oldAttr "Old" (possibly user-changed) outputs.
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68 * @param newAttr "New" (eventually re-read in its original, unchanged
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69 * form) outputs.
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70 * @param matrix Compatibility matrix, mapping output names to list of
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71 * facet names that can be included in this out.
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72 */
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73 public AttributeWriter(
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74 ArtifactDatabase db,
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75 CollectionAttribute attribute,
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76 Map<String, Output> oldAttr,
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77 List<Facet> oldFacets,
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78 Map<String, Output> newAttr,
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79 List<Facet> newFacets,
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80 Map<String, List<String>> matrix)
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81 {
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82 this.db = db;
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83 this.attribute = attribute;
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84 this.oldAttr = oldAttr;
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85 this.newAttr = newAttr;
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86 this.oldFacets = oldFacets;
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87 this.newFacets = newFacets;
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88 this.compatibilities = matrix;
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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 * Create document by merging outputs given in
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94 * constructor.
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95 *
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96 * The "new" set rules about existance of attributes, so anything not
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97 * present in it will not be included in the resulting document.
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98 * The "old" set rules about the content of attributes (as user changes
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99 * are recorded here and not in the new set).
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100 *
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101 * @return document with merged outputs as described.
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102 */
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103 protected CollectionAttribute write() {
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104
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105 boolean debug = logger.isDebugEnabled();
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106
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107 for (Map.Entry<String, Output> entry: newAttr.entrySet()) {
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108 String outName = entry.getKey();
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109 Output a = entry.getValue();
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110
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111 if (!attribute.hasOutput(outName)) {
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112 attribute.addOutput(outName, a);
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113 }
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114
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115 attribute.clearFacets(outName);
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116
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117 if (debug) {
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118 logger.debug("Merge Output: " + outName);
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119 logger.debug(" old Facets: " + oldFacets.size());
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120 logger.debug(" new Facets: " + newFacets.size());
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121 }
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122
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123 writeOutput(a.getName(), newFacets, oldFacets);
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124 }
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125
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126 // THIS CALL IS ABSOLUTELY NECESSARY!
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127 attribute.cleanEmptyOutputs();
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128
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129 return attribute;
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130 }
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131
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132
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133 /**
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134 * @param outputName the "new" outputs name
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135 * @param newOutFacets Facets of the new outputs
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136 * @param oldOutFacets Facets of the old outputs (can be null)
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137 */
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138 protected void writeOutput(
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139 String outputName,
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140 List<Facet> newOutFacets,
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141 List<Facet> oldOutFacets
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142 ) {
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143 List<String> compatFacets = this.compatibilities.get(outputName);
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144
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145 if (logger.isDebugEnabled() && compatFacets != null) {
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146 logger.debug("Compabitle Facets:");
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147 for (String compatible: compatFacets) {
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148 logger.debug( "- " + compatible);
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149 }
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150 }
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151
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152 try {
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153 writeFacets(outputName, newOutFacets, oldOutFacets, compatFacets);
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154 }
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155 catch (ArtifactDatabaseException ade) {
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156 logger.error(ade, ade);
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157 }
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158 }
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159
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160
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161 /**
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162 * @param newFacets the new facets
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163 * @param oldFacets the old facets
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164 * @param compatibleFacets List of facets to accept
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165 * @return true if any facets are written to the out.
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166 */
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167 protected boolean writeFacets(
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168 String outputName,
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169 List<Facet> newFacets,
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170 List<Facet> oldFacets,
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171 List<String> compatibleFacets)
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172 throws ArtifactDatabaseException
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173 {
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174 if (compatibleFacets == null) {
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175 logger.warn("No compatible facets, not generating out " + outputName + ".");
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176 return false;
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177 }
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178
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179 int num = newFacets.size();
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180
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181 // Add all new Facets either in their old state or (if really
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182 // new) as they are.
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183 List<ManagedFacet> currentFacets = new ArrayList<ManagedFacet>();
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184 List<ManagedFacet> genuinelyNewFacets = new ArrayList<ManagedFacet>();
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185
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186 boolean debug = logger.isDebugEnabled();
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187 if (debug) {
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188 logger.debug("Compatible facets are " + compatibleFacets);
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189 }
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190
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191 for (int i = 0; i < num; i++) {
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192 ManagedFacet facet = (ManagedFacet) newFacets.get(i);
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193
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194 if (debug) {
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195 logger.debug("Try to add Facet: " + facet.getName());
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196 }
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197
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198 if (!compatibleFacets.contains(facet.getName())) {
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199 logger.warn("Have incompatible facet, skip: " + facet.getName());
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200 continue;
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201 }
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202 else {
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203 logger.debug("Have compatible facet: " + facet.getName());
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204 }
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205
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206 ManagedFacet picked = pickFacet(facet, oldFacets);
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207
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208 if (facet.equals(picked)) {
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209 genuinelyNewFacets.add(picked);
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210 }
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211 else {
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212 currentFacets.add(picked);
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213 }
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214 }
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215
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216 FacetActivity.Registry registry = FacetActivity.Registry.getInstance();
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217
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218 // With each genuinely new Facet, figure out whether it comes to live
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219 // in/activate.
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220 for (ManagedFacet newMF: genuinelyNewFacets) {
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221 FLYSArtifact flys =
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222 (FLYSArtifact)db.getRawArtifact(newMF.getArtifact());
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223
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224 boolean isActive = registry.isInitialActive(
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225 flys.getName(), flys, newMF, outputName);
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226
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227 newMF.setActive(isActive ? 1 : 0);
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228 }
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229
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230 // For each genuinely new Facet check positional conflicts.
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231 for (ManagedFacet newMF: genuinelyNewFacets) {
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232 boolean conflicts = true;
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233 // Loop until all conflicts resolved.
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234 while (conflicts) {
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235 conflicts = false;
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236 for (ManagedFacet oldMF: currentFacets) {
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237 if (newMF.getPosition() == oldMF.getPosition()) {
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238 conflicts = true;
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239 if (debug) {
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240 logger.debug(
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241 "Positional conflict while merging " +
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242 "facets, pushing newest facet 1 up (" +
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243 newMF.getPosition() + ")");
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244 }
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245 newMF.setPosition(newMF.getPosition() + 1);
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246 break;
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247 }
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248 }
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249 }
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250 currentFacets.add(newMF);
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251 }
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252
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253 // Fill/correct "gaps" (e.g. position 1,2,5 are taken, after gap filling
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254 // expect positions 1,2,3 [5->3])
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255 // Preparations to be able to detect gaps.
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256 Map<Integer, ManagedFacet> mfmap =
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257 new HashMap<Integer, ManagedFacet>();
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258 int max = 0;
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259 for (ManagedFacet mf: currentFacets) {
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260 int pos = mf.getPosition();
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261 mfmap.put(Integer.valueOf(pos), mf);
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262 if (pos > max) max = pos;
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263 }
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264
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265 // Finally do gap correction.
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266 if (max != currentFacets.size()) {
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267 int gap = 0;
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268 for (int i = 1; i <= max; i++) {
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269 ManagedFacet mf = mfmap.get(Integer.valueOf(i));
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270 if (mf == null) {
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271 gap++;
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272 continue;
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273 }
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274 mf.setPosition(mf.getPosition() - gap);
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275 }
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276 }
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277
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278 // Now add all facets.
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279 for (ManagedFacet oldMF: currentFacets) {
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280 attribute.addFacet(outputName, oldMF);
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281 }
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282
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283 return !currentFacets.isEmpty();
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284 }
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285
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286
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287 /**
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288 * Returns the facet to be added to Document.
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289 * Return the new facet only if the "same" facet was not present before.
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290 * Return the "old" facet otherwise (user-defined information sticks
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291 * to it).
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292 * @param facet the new facet.
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293 * @param oldFacets the old facets, new facet is compared against each of
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294 * these.
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295 * @return facet if genuinely new, matching old facet otherwise.
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296 */
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297 protected ManagedFacet pickFacet(ManagedFacet facet, List<Facet> oldFacets)
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298 {
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299 if (oldFacets == null) {
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300 logger.debug("No old facets to compare a new to found.");
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301 return facet;
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302 }
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303
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304 String hash = facet.getName() + facet.getIndex() + facet.getArtifact();
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305
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306 // Compare "new" facet with all old facets.
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307 // Take oldFacet if that facet was already present (otherwise
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308 // information is lost, the new one otherwise.
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309 for (Facet oFacet: oldFacets) {
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310 ManagedFacet oldFacet = (ManagedFacet) oFacet;
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311 String oldHash = oldFacet.getName()
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312 + oldFacet.getIndex()
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313 + oldFacet.getArtifact();
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314 if (hash.equals(oldHash)) {
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315 return oldFacet;
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316 }
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317 }
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318 return facet;
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319 }
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320 }
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853dceead0f4 Only generate facets when needed.
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321 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org