Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/collections/AttributeWriter.java @ 4573:b87073a05f9d

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flys-client: Patch to render combobox options as clickable links. The way of passing data arguments to the links and further to the Artifact feeding service is somewhat hacked and should be refactored (later...).
author Christian Lins <christian.lins@intevation.de>
date Tue, 27 Nov 2012 12:50:10 +0100
parents b74399bd0960
children 725de57d3774
rev   line source
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16161de47662 The Attributes of a collection are written into its DESCRIBE now.
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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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9
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10 import de.intevation.artifacts.ArtifactDatabase;
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11 import de.intevation.artifacts.ArtifactDatabaseException;
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13 import de.intevation.artifactdatabase.state.Facet;
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14 import de.intevation.artifactdatabase.state.FacetActivity;
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15 import de.intevation.artifactdatabase.state.Output;
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17 import de.intevation.flys.artifacts.FLYSArtifact;
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18 import de.intevation.flys.artifacts.model.ManagedFacet;
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19
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20 /**
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21 * Create attribute- element of describe document of an ArtifactCollection.
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22 * The attribute-element contains the merged output of all outputmodes and
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23 * facets that are part of the collection.
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24 */
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25 public class AttributeWriter {
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26
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27 /** ArtifactDatabase used to fetch Artifacts. */
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28 protected ArtifactDatabase db = null;
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29
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30 protected Map<String, Output> oldAttr;
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32 protected Map<String, Output> newAttr;
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33
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34 /** List of already seen facets. */
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35 protected List<Facet> oldFacets;
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36
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37 /** List of "new" facets. */
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38 protected List<Facet> newFacets;
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39
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40 /**
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41 * "Compatibility matrix", mapws list of facet names to output names.
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42 * Any facet that is not found in the list for a specific output will
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43 * not be added to the resulting document.
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44 */
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45 protected Map<String, List<String>> compatibilities;
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46
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48 /** The result of the <i>write()</i> operation.*/
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49 protected CollectionAttribute attribute;
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51
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52 private static Logger logger = Logger.getLogger(AttributeWriter.class);
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53
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54
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55 /**
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56 * Create a AttributeWriter.
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57 * Attributes not present in newAttr will not be included in the document.
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58 * @param db Database to fetch artifacts.
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59 * @param oldAttr "Old" (possibly user-changed) outputs.
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60 * @param newAttr "New" (eventually re-read in its original, unchanged
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61 * form) outputs.
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62 */
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63 public AttributeWriter(
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64 ArtifactDatabase db,
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65 CollectionAttribute attribute,
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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.attribute = attribute;
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74 this.oldAttr = oldAttr;
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75 this.newAttr = newAttr;
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76 this.oldFacets = oldFacets;
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77 this.newFacets = newFacets;
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78 this.compatibilities = matrix;
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79 }
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81
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82 /**
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83 * Create document by merging outputs given in
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84 * constructor.
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85 *
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86 * The "new" set rules about existance of attributes, so anything not
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87 * present in it will not be included in the resulting document.
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88 * The "old" set rules about the content of attributes (as user changes
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89 * are recorded here and not in the new set).
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90 *
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91 * @return document with merged outputs as described.
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92 */
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93 protected CollectionAttribute write() {
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95 boolean debug = logger.isDebugEnabled();
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96
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97 for (Map.Entry<String, Output> entry: newAttr.entrySet()) {
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98 String outName = entry.getKey();
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99 Output a = entry.getValue();
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100
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101 Output exists = attribute.getOutput(outName);
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102 if (exists == null) {
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103 attribute.addOutput(outName, a);
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104 }
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105
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106 attribute.clearFacets(outName);
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107
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108 if (debug) {
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109 logger.debug("Merge Output: " + outName);
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110 logger.debug(" old Facets: " + oldFacets.size());
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111 logger.debug(" new Facets: " + newFacets.size());
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112 }
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113
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114 writeOutput(a.getName(), newFacets, oldFacets);
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115 }
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116
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117 // THIS CALL IS ABSOLUTELY NECESSARY!
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118 attribute.cleanEmptyOutputs();
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119
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120 return attribute;
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121 }
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122
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123
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124 /**
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125 * @param outputName the "new" outputs name
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126 * @param newOutFacets Facets of the new outputs
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127 * @param oldOutFacets Facets of the old outputs (can be null)
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128 */
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129 protected void writeOutput(
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130 String outputName,
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131 List<Facet> newOutFacets,
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132 List<Facet> oldOutFacets
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133 ) {
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134 List<String> compatFacets = this.compatibilities.get(outputName);
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135
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136 if (logger.isDebugEnabled() && compatFacets != null) {
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137 logger.debug("Compabitle Facets:");
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138 for (String compatible: compatFacets) {
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139 logger.debug( "- " + compatible);
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140 }
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141 }
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142
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143 try {
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144 writeFacets(outputName, newOutFacets, oldOutFacets, compatFacets);
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145 }
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146 catch (ArtifactDatabaseException ade) {
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147 logger.error(ade, ade);
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148 }
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149 }
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150
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151
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152 /**
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153 * @param newFacets the new facets
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154 * @param oldFacets the old facets
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155 * @param compatibleFacets List of facets to accept
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156 * @return true if any facets are written to the out.
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157 */
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158 protected boolean writeFacets(
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159 String outputName,
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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 if (compatibleFacets == null) {
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166 logger.warn("No compatible facets, not generating out.");
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167 return false;
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168 }
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169
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170 int num = newFacets.size();
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171
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172 // Add all new Facets either in their old state or (if really
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173 // new) as they are.
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174 List<ManagedFacet> currentFacets = new ArrayList<ManagedFacet>();
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175 List<ManagedFacet> genuinelyNewFacets = new ArrayList<ManagedFacet>();
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176
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177 boolean debug = logger.isDebugEnabled();
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178 if (debug) {
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179 logger.debug("Compatible facets are " + compatibleFacets);
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180 }
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181
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182 for (int i = 0; i < num; i++) {
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183 ManagedFacet facet = (ManagedFacet) newFacets.get(i);
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184
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185 if (debug) {
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186 logger.debug("Try to add Facet: " + facet.getName());
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187 }
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188
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189 if (!compatibleFacets.contains(facet.getName())) {
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190 logger.warn("Have incompatible facet, skip: " + facet.getName());
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191 continue;
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192 }
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193 else {
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194 logger.debug("Have compatible facet: " + facet.getName());
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195 }
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196
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197 ManagedFacet picked = pickFacet(facet, oldFacets);
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198
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199 if (facet.equals(picked)) {
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200 genuinelyNewFacets.add(picked);
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201 }
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202 else {
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203 currentFacets.add(picked);
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204 }
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205 }
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206
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207 FacetActivity.Registry registry = FacetActivity.Registry.getInstance();
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208
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209 // With each genuinely new Facet, figure out whether it comes to live
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210 // in/activate.
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211 for (ManagedFacet newMF: genuinelyNewFacets) {
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212 FLYSArtifact flys =
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213 (FLYSArtifact)db.getRawArtifact(newMF.getArtifact());
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214
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215 boolean isActive = registry.isInitialActive(
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216 flys.getName(), flys, newMF, outputName);
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217
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218 newMF.setActive(isActive ? 1 : 0);
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219 }
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220
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221 // For each genuinely new Facet check positional conflicts.
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222 for (ManagedFacet newMF: genuinelyNewFacets) {
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223 boolean conflicts = true;
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224 // Loop until all conflicts resolved.
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225 while (conflicts) {
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226 conflicts = false;
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227 for (ManagedFacet oldMF: currentFacets) {
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228 if (newMF.getPosition() == oldMF.getPosition()) {
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229 conflicts = true;
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230 if (debug) {
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231 logger.debug(
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232 "Positional conflict while merging " +
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233 "facets, pushing newest facet 1 up (" +
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234 newMF.getPosition() + ")");
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235 }
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236 newMF.setPosition(newMF.getPosition() + 1);
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237 break;
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238 }
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239 }
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240 }
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241 currentFacets.add(newMF);
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242 }
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243
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244 // Fill/correct "gaps" (e.g. position 1,2,5 are taken, after gap filling
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245 // expect positions 1,2,3 [5->3])
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246 // Preparations to be able to detect gaps.
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247 Map<Integer, ManagedFacet> mfmap =
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248 new HashMap<Integer, ManagedFacet>();
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249 int max = 0;
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250 for (ManagedFacet mf: currentFacets) {
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251 int pos = mf.getPosition();
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252 mfmap.put(Integer.valueOf(pos), mf);
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253 if (pos > max) max = pos;
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254 }
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255
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256 // Finally do gap correction.
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257 if (max != currentFacets.size()) {
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258 int gap = 0;
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259 for (int i = 1; i <= max; i++) {
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260 ManagedFacet mf = mfmap.get(Integer.valueOf(i));
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261 if (mf == null) {
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262 gap++;
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263 continue;
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264 }
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265 mf.setPosition(mf.getPosition() - gap);
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266 }
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267 }
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268
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269 // Now add all facets.
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270 for (ManagedFacet oldMF: currentFacets) {
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0b466bd4ab24 Introduced a CollectionAttribute class that stores the information provided by the Collection's attribute document.
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271 attribute.addFacet(outputName, oldMF);
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272 }
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273
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274 return !currentFacets.isEmpty();
346
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275 }
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276
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277
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278 /**
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279 * Returns the facet to be added to Document.
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280 * Return the new facet only if the "same" facet was not present before.
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281 * Return the "old" facet otherwise (user-defined information sticks
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282 * to it).
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283 * @param facet the new facet.
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284 * @param oldFacets the old facets, new facet is compared against each of
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285 * these.
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286 * @return facet if genuinely new, matching old facet otherwise.
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287 */
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288 protected ManagedFacet pickFacet(ManagedFacet facet, List<Facet> oldFacets)
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289 {
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290 if (oldFacets == null) {
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291 logger.debug("No old facets to compare a new to found.");
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292 return facet;
346
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293 }
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294
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295 String hash = facet.getName() + facet.getIndex() + facet.getArtifact();
346
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296
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297 // Compare "new" facet with all old facets.
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298 // Take oldFacet if that facet was already present (otherwise
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299 // information is lost, the new one otherwise.
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300 for (Facet oFacet: oldFacets) {
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301 ManagedFacet oldFacet = (ManagedFacet) oFacet;
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302 String oldHash = oldFacet.getName()
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303 + oldFacet.getIndex()
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304 + oldFacet.getArtifact();
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305 if (hash.equals(oldHash)) {
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306 return oldFacet;
346
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307 }
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308 }
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309 return facet;
346
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310 }
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311 }
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853dceead0f4 Only generate facets when needed.
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312 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org