Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/collections/AttributeWriter.java @ 5818:a4ff4167be1e

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Request feature info on all layers and show it as html if the server does not return valid gml. Non queryable layers produce an error message when the request fails. This is good enough
author Andre Heinecke <aheinecke@intevation.de>
date Wed, 24 Apr 2013 17:33:27 +0200
parents 345f3bba6f15
children
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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16
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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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47
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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 * @param matrix Compatibility matrix, mapping output names to list of
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63 * facet names that can be included in this out.
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64 */
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65 public AttributeWriter(
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66 ArtifactDatabase db,
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67 CollectionAttribute attribute,
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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.attribute = attribute;
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76 this.oldAttr = oldAttr;
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77 this.newAttr = newAttr;
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78 this.oldFacets = oldFacets;
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79 this.newFacets = newFacets;
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80 this.compatibilities = matrix;
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81 }
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82
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83
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84 /**
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85 * Create document by merging outputs given in
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86 * constructor.
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87 *
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88 * The "new" set rules about existance of attributes, so anything not
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89 * present in it will not be included in the resulting document.
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90 * The "old" set rules about the content of attributes (as user changes
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91 * are recorded here and not in the new set).
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92 *
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93 * @return document with merged outputs as described.
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94 */
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95 protected CollectionAttribute write() {
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97 boolean debug = logger.isDebugEnabled();
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98
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99 for (Map.Entry<String, Output> entry: newAttr.entrySet()) {
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100 String outName = entry.getKey();
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101 Output a = entry.getValue();
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102
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103 if (!attribute.hasOutput(outName)) {
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104 attribute.addOutput(outName, a);
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105 }
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106
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107 attribute.clearFacets(outName);
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108
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109 if (debug) {
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110 logger.debug("Merge Output: " + outName);
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111 logger.debug(" old Facets: " + oldFacets.size());
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112 logger.debug(" new Facets: " + newFacets.size());
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113 }
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114
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115 writeOutput(a.getName(), newFacets, oldFacets);
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116 }
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117
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118 // THIS CALL IS ABSOLUTELY NECESSARY!
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119 attribute.cleanEmptyOutputs();
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120
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121 return attribute;
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122 }
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123
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124
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125 /**
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126 * @param outputName the "new" outputs name
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127 * @param newOutFacets Facets of the new outputs
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128 * @param oldOutFacets Facets of the old outputs (can be null)
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129 */
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130 protected void writeOutput(
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131 String outputName,
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132 List<Facet> newOutFacets,
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133 List<Facet> oldOutFacets
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134 ) {
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135 List<String> compatFacets = this.compatibilities.get(outputName);
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136
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137 if (logger.isDebugEnabled() && compatFacets != null) {
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138 logger.debug("Compabitle Facets:");
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139 for (String compatible: compatFacets) {
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140 logger.debug( "- " + compatible);
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141 }
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142 }
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143
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144 try {
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145 writeFacets(outputName, newOutFacets, oldOutFacets, compatFacets);
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146 }
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147 catch (ArtifactDatabaseException ade) {
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148 logger.error(ade, ade);
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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 /**
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154 * @param newFacets the new facets
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155 * @param oldFacets the old facets
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156 * @param compatibleFacets List of facets to accept
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157 * @return true if any facets are written to the out.
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158 */
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159 protected boolean writeFacets(
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160 String outputName,
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161 List<Facet> newFacets,
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162 List<Facet> oldFacets,
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163 List<String> compatibleFacets)
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164 throws ArtifactDatabaseException
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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 " + outputName + ".");
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168 return false;
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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 boolean debug = logger.isDebugEnabled();
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179 if (debug) {
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180 logger.debug("Compatible facets are " + compatibleFacets);
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181 }
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182
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183 for (int i = 0; i < num; i++) {
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184 ManagedFacet facet = (ManagedFacet) newFacets.get(i);
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185
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186 if (debug) {
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187 logger.debug("Try to add Facet: " + facet.getName());
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188 }
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189
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190 if (!compatibleFacets.contains(facet.getName())) {
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191 logger.warn("Have incompatible facet, skip: " + facet.getName());
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192 continue;
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193 }
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194 else {
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195 logger.debug("Have compatible facet: " + facet.getName());
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196 }
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197
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198 ManagedFacet picked = pickFacet(facet, oldFacets);
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199
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200 if (facet.equals(picked)) {
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201 genuinelyNewFacets.add(picked);
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202 }
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203 else {
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204 currentFacets.add(picked);
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205 }
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206 }
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207
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208 FacetActivity.Registry registry = FacetActivity.Registry.getInstance();
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209
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210 // With each genuinely new Facet, figure out whether it comes to live
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211 // in/activate.
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212 for (ManagedFacet newMF: genuinelyNewFacets) {
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213 FLYSArtifact flys =
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214 (FLYSArtifact)db.getRawArtifact(newMF.getArtifact());
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215
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216 boolean isActive = registry.isInitialActive(
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217 flys.getName(), flys, newMF, outputName);
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218
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219 newMF.setActive(isActive ? 1 : 0);
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220 }
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221
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222 // For each genuinely new Facet check positional conflicts.
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223 for (ManagedFacet newMF: genuinelyNewFacets) {
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224 boolean conflicts = true;
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225 // Loop until all conflicts resolved.
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226 while (conflicts) {
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227 conflicts = false;
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228 for (ManagedFacet oldMF: currentFacets) {
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229 if (newMF.getPosition() == oldMF.getPosition()) {
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230 conflicts = true;
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231 if (debug) {
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232 logger.debug(
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233 "Positional conflict while merging " +
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234 "facets, pushing newest facet 1 up (" +
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235 newMF.getPosition() + ")");
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236 }
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237 newMF.setPosition(newMF.getPosition() + 1);
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238 break;
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239 }
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240 }
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241 }
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242 currentFacets.add(newMF);
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243 }
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244
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245 // Fill/correct "gaps" (e.g. position 1,2,5 are taken, after gap filling
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246 // expect positions 1,2,3 [5->3])
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247 // Preparations to be able to detect gaps.
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248 Map<Integer, ManagedFacet> mfmap =
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249 new HashMap<Integer, ManagedFacet>();
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250 int max = 0;
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251 for (ManagedFacet mf: currentFacets) {
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252 int pos = mf.getPosition();
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253 mfmap.put(Integer.valueOf(pos), mf);
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254 if (pos > max) max = pos;
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255 }
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256
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257 // Finally do gap correction.
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258 if (max != currentFacets.size()) {
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259 int gap = 0;
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260 for (int i = 1; i <= max; i++) {
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261 ManagedFacet mf = mfmap.get(Integer.valueOf(i));
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262 if (mf == null) {
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263 gap++;
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264 continue;
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265 }
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266 mf.setPosition(mf.getPosition() - gap);
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267 }
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268 }
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269
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270 // Now add all facets.
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271 for (ManagedFacet oldMF: currentFacets) {
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272 attribute.addFacet(outputName, oldMF);
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273 }
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274
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275 return !currentFacets.isEmpty();
346
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276 }
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277
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278
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279 /**
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280 * Returns the facet to be added to Document.
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281 * Return the new facet only if the "same" facet was not present before.
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282 * Return the "old" facet otherwise (user-defined information sticks
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283 * to it).
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284 * @param facet the new facet.
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285 * @param oldFacets the old facets, new facet is compared against each of
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286 * these.
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287 * @return facet if genuinely new, matching old facet otherwise.
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288 */
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289 protected ManagedFacet pickFacet(ManagedFacet facet, List<Facet> oldFacets)
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f643ea084213 Allow simple codepaths to have Facets initially being 'inactive' (wrt rendering).
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290 {
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291 if (oldFacets == null) {
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292 logger.debug("No old facets to compare a new to found.");
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293 return facet;
346
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294 }
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295
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296 String hash = facet.getName() + facet.getIndex() + facet.getArtifact();
346
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297
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298 // Compare "new" facet with all old facets.
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299 // Take oldFacet if that facet was already present (otherwise
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300 // information is lost, the new one otherwise.
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301 for (Facet oFacet: oldFacets) {
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302 ManagedFacet oldFacet = (ManagedFacet) oFacet;
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303 String oldHash = oldFacet.getName()
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304 + oldFacet.getIndex()
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305 + oldFacet.getArtifact();
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306 if (hash.equals(oldHash)) {
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307 return oldFacet;
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308 }
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309 }
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310 return facet;
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311 }
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312 }
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853dceead0f4 Only generate facets when needed.
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313 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :
http://dive4elements.wald.intevation.org