Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/collections/AttributeWriter.java @ 1862:4cc21f0a470e
Handle Annotation Facets in DischargeLongitudinalSection diagrams.
flys-artifacts/trunk@3211 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Felix Wolfsteller <felix.wolfsteller@intevation.de> |
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date | Thu, 10 Nov 2011 10:20:40 +0000 |
parents | 490ab097f58c |
children | 0b466bd4ab24 |
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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9 |
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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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16 import de.intevation.artifacts.ArtifactNamespaceContext; |
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17 |
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18 import de.intevation.artifactdatabase.state.Facet; |
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19 import de.intevation.artifactdatabase.state.Output; |
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20 |
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21 import de.intevation.artifacts.common.utils.XMLUtils; |
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22 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator; |
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23 |
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24 import de.intevation.flys.artifacts.FLYSArtifact; |
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25 import de.intevation.flys.artifacts.model.ManagedFacet; |
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26 |
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27 /** |
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28 * Create attribute- element of describe document of an ArtifactCollection. |
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29 * The attribute-element contains the merged output of all outputmodes and |
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30 * facets that are part of the collection. |
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31 */ |
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32 public class AttributeWriter { |
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33 |
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34 /** ArtifactDatabase used to fetch Artifacts. */ |
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35 protected ArtifactDatabase db = null; |
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36 |
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37 protected Map<String, Output> oldAttr; |
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38 |
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39 protected Map<String, Output> newAttr; |
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40 |
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41 /** List of already seen facets. */ |
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42 protected List<Facet> oldFacets; |
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43 |
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44 /** List of "new" facets. */ |
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45 protected List<Facet> newFacets; |
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46 |
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47 /** |
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48 * "Compatibility matrix", mapws list of facet names to output names. |
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49 * Any facet that is not found in the list for a specific output will |
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50 * not be added to the resulting document. |
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51 */ |
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52 protected Map<String, List<String>> compatibilities; |
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53 |
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54 private static Logger logger = Logger.getLogger(AttributeWriter.class); |
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55 |
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56 |
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57 /** |
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58 * Create a AttributeWriter. |
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59 * Attributes not present in newAttr will not be included in the document. |
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60 * @param db Database to fetch artifacts. |
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61 * @param oldAttr "Old" (possibly user-changed) outputs. |
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62 * @param newAttr "New" (eventually re-read in its original, unchanged |
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63 * form) outputs. |
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64 */ |
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65 public AttributeWriter( |
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66 ArtifactDatabase db, |
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67 Map<String, Output> oldAttr, |
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68 List<Facet> oldFacets, |
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69 Map<String, Output> newAttr, |
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70 List<Facet> newFacets, |
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71 Map<String, List<String>> matrix) |
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72 { |
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73 this.db = db; |
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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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80 |
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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 Document write() { |
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94 Document doc = XMLUtils.newDocument(); |
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95 |
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96 ElementCreator cr = new ElementCreator( |
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97 doc, |
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98 ArtifactNamespaceContext.NAMESPACE_URI, |
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99 ArtifactNamespaceContext.NAMESPACE_PREFIX); |
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100 |
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101 Element attribute = cr.create("attribute"); |
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102 Element outs = cr.create("outputs"); |
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103 |
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104 attribute.appendChild(outs); |
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105 doc.appendChild(attribute); |
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106 |
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107 for (String outName: newAttr.keySet()) { |
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108 Output a = newAttr.get(outName); |
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109 Output b = oldAttr.get(outName); |
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110 |
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111 writeOutput(doc, outs, cr, a.getName(), newFacets, oldFacets); |
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112 } |
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113 |
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114 return doc; |
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115 } |
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116 |
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117 |
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118 /** |
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119 * @param doc Document to add output nodes to |
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120 * @param outs Node in Document to add output nodes to |
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121 * @param cr ElementCreator in use to modify doc/outs |
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122 * @param outputName the "new" outputs name |
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123 * @param newOutFacets Facets of the new outputs |
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124 * @param oldOutFacets Facets of the old outputs (can be null) |
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125 */ |
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126 protected void writeOutput( |
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127 Document doc, |
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128 Node outs, |
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129 ElementCreator cr, |
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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 Element output = cr.create("output"); |
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135 cr.addAttr(output, "name", outputName); |
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136 |
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137 |
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138 List<String> compatibleFacets = this.compatibilities.get(outputName); |
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139 try { |
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140 if (writeFacets( |
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141 doc, cr, output, newOutFacets, oldOutFacets, |
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142 compatibleFacets)) |
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143 { |
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144 // Add output element only if it contains facets. |
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145 outs.appendChild(output); |
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146 } |
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147 } |
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148 catch (ArtifactDatabaseException ade) { |
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149 logger.error(ade, ade); |
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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 /** |
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155 * @param doc Document to add facet nodes to |
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156 * @param cr ElementCreator to use with output/doc |
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157 * @param output Node in Document to add facet nodes to |
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158 * @param newFacets the new facets |
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159 * @param oldFacets the old facets |
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160 * @param compatibleFacets List of facets to accept |
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161 * @return true if any facets are written to the out. |
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162 */ |
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163 protected boolean writeFacets( |
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164 Document doc, |
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165 ElementCreator cr, |
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166 Element output, |
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167 List<Facet> newFacets, |
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168 List<Facet> oldFacets, |
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169 List<String> compatibleFacets) |
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170 throws ArtifactDatabaseException |
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171 { |
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172 if (compatibleFacets == null) { |
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173 logger.warn("No compatible facets, not generating out."); |
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174 return false; |
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175 } |
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176 |
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177 int num = newFacets.size(); |
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178 |
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179 // Add all new Facets either in their old state or (if really |
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180 // new) as they are. |
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181 List<ManagedFacet> currentFacets = new ArrayList<ManagedFacet>(); |
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182 List<ManagedFacet> genuinelyNewFacets = new ArrayList<ManagedFacet>(); |
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183 |
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184 for (int i = 0; i < num; i++) { |
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185 ManagedFacet facet = (ManagedFacet) newFacets.get(i); |
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186 if (!compatibleFacets.contains(facet.getName())) { |
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187 //logger.debug("Have incompatible facet, skip: " + facet.getName()); |
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188 continue; |
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189 } |
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190 //else logger.debug("Have compatible facet: " + facet.getName()); |
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191 |
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192 ManagedFacet picked = pickFacet(facet, oldFacets); |
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193 |
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194 if (facet.equals(picked)) { |
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195 genuinelyNewFacets.add(picked); |
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196 } |
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197 else { |
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198 currentFacets.add(picked); |
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199 } |
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200 } |
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201 |
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202 // With each genuinely new Facet, ask Artifact whether it comes to live |
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203 // in/activate. |
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204 for (ManagedFacet newMF: genuinelyNewFacets) { |
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205 FLYSArtifact flys = (FLYSArtifact) db.getRawArtifact(newMF.getArtifact()); |
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206 newMF.setActive(flys.getInitialFacetActivity( |
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207 output.getAttribute("name"), |
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208 newMF.getName(), |
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209 newMF.getIndex())); |
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210 } |
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211 |
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212 // For each genuinely new Facet check positional conflicts. |
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213 for (ManagedFacet newMF: genuinelyNewFacets) { |
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214 boolean conflicts = true; |
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215 // Loop until all conflicts resolved. |
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216 while (conflicts) { |
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217 conflicts = false; |
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218 for (ManagedFacet oldMF: currentFacets) { |
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219 if (newMF.getPosition() == oldMF.getPosition()) { |
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220 conflicts = true; |
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221 logger.debug("Positional conflict while merging " + |
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222 "facets, pushing newest facet 1 up (" + newMF.getPosition() + ")"); |
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223 newMF.setPosition(newMF.getPosition() + 1); |
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224 break; |
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225 } |
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226 } |
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227 } |
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228 currentFacets.add(newMF); |
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229 } |
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230 |
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231 // Fill/correct "gaps" (e.g. position 1,2,5 are taken, after gap filling |
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232 // expect positions 1,2,3 [5->3]) |
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233 // Preparations to be able to detect gaps. |
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234 Map<Integer, ManagedFacet> mfmap = new HashMap<Integer, ManagedFacet>(); |
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235 int max = 0; |
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236 for (ManagedFacet mf: currentFacets) { |
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237 int pos = mf.getPosition(); |
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238 mfmap.put(Integer.valueOf(pos), mf); |
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239 if (pos > max) max = pos; |
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240 } |
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241 |
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242 // Finally do gap correction. |
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243 if (max != currentFacets.size()) { |
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244 int gap = 0; |
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245 for (int i = 1; i <= max; i++) { |
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246 ManagedFacet mf = mfmap.get(Integer.valueOf(i)); |
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247 if (mf == null) { |
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248 gap++; |
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249 continue; |
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250 } |
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251 mf.setPosition(mf.getPosition() - gap); |
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252 } |
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253 } |
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254 |
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255 // Now add all facets. |
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256 for (ManagedFacet oldMF: currentFacets) { |
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257 Node node = oldMF.toXML(doc); |
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258 if (node != null) { |
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259 output.appendChild(node); |
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260 } |
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261 } |
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262 |
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263 return currentFacets.size() > 0; |
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264 } |
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265 |
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266 |
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267 /** |
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268 * Returns the facet to be added to Document. |
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269 * Return the new facet only if the "same" facet was not present before. |
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270 * Return the "old" facet otherwise (user-defined information sticks |
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271 * to it). |
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272 * @param facet the new facet. |
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273 * @param oldFacets the old facets, new facet is compared against each of |
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274 * these. |
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275 * @return facet if genuinely new, matching old facet otherwise. |
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276 */ |
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277 protected ManagedFacet pickFacet(ManagedFacet facet, |
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278 List<Facet> oldFacets) |
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279 { |
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280 if (oldFacets == null) { |
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281 logger.debug("No old facets to compare a new to found."); |
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282 return facet; |
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283 } |
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284 |
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285 String hash = facet.getName() + facet.getIndex() + facet.getArtifact(); |
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286 |
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287 // Compare "new" facet with all old facets. |
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288 // Take oldFacet if that facet was already present (otherwise |
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289 // information is lost, the new one otherwise. |
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290 for (Facet oFacet: oldFacets) { |
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291 ManagedFacet oldFacet = (ManagedFacet) oFacet; |
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292 String oldHash = oldFacet.getName() |
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293 + oldFacet.getIndex() |
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294 + oldFacet.getArtifact(); |
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295 if (hash.equals(oldHash)) { |
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296 return oldFacet; |
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297 } |
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298 } |
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299 return facet; |
346
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300 } |
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301 } |
705
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302 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 : |