Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/RelativePointFacet.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 cce12c06466f
children
rev   line source
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1 package de.intevation.flys.artifacts.model;
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2
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3 import java.util.List;
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4 import java.awt.geom.Point2D;
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5
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6 import org.apache.log4j.Logger;
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7
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8 import de.intevation.artifacts.Artifact;
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9 import de.intevation.artifacts.CallContext;
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10 import de.intevation.artifacts.DataProvider;
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11
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12 import de.intevation.flys.artifacts.StaticWKmsArtifact;
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13 import de.intevation.flys.artifacts.StaticWQKmsArtifact;
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14 import de.intevation.flys.artifacts.math.Linear;
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15
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16 /**
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17 * Facet to access a point.
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18 */
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19 public class RelativePointFacet
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20 extends BlackboardDataFacet
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21 implements FacetTypes {
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22
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23 /** Own logger. */
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24 private static Logger logger = Logger.getLogger(RelativePointFacet.class);
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25
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26 /** Trivial Constructor. */
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27 public RelativePointFacet(String description) {
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28 this(RELATIVE_POINT, description);
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29 }
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30
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31
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32 public RelativePointFacet(String name, String description) {
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33 this.name = name;
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34 this.description = description;
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35 this.index = 0;
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36 }
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37
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38
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39 protected Point2D calculateDurationCurvePoint(CallContext context,
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40 WKms wKms)
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41 {
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42 // TODO here and in reference curve calc: Do warn if more than 1
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43 // provider found or (way better) handle it.
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44 Object wqdays = null;
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45 double km = 0d;
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46 List<DataProvider> providers = context.
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47 getDataProvider(DurationCurveFacet.BB_DURATIONCURVE);
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48 if (providers.size() < 1) {
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49 logger.warn("Could not find durationcurve data provider.");
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50 }
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51 else {
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52 wqdays = providers.get(0).provideData(
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53 DurationCurveFacet.BB_DURATIONCURVE,
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54 null,
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55 context);
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56 }
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57 List<DataProvider> kmproviders = context.
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58 getDataProvider(DurationCurveFacet.BB_DURATIONCURVE_KM);
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59 if (kmproviders.size() < 1) {
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60 logger.warn("Could not find durationcurve.km data provider.");
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61 }
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62 else {
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63 logger.debug("Found durationcurve.km data provider.");
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64 String dckm = providers.get(0).provideData(
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65 DurationCurveFacet.BB_DURATIONCURVE_KM,
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66 null,
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67 context).toString();
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68 km = Double.valueOf(dckm);
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69 }
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70
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71 if (wqdays != null) {
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72 // Which W at this km?
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73 double w = StaticWKmsArtifact.getWAtKmLin(wKms, km);
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74 if (w == -1) {
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75 logger.warn("w is -1, already bad sign!");
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76 }
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77 // Where is this W passed by in the wq-curve?
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78 WQDay wqday = (WQDay) wqdays;
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79 // Doing a linear Day Of KM.
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80 int idx = 0;
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81 boolean wIncreases = wqday.getW(0) < wqday.getW(wqday.size()-1);
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82 if (wIncreases) {
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83 while (idx < wqday.size() && wqday.getW(idx) < w) {
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84 idx++;
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85 }
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86 }
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87 else {
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88 idx = wqday.size() -1;
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89 while (idx > 0 && wqday.getW(idx) > w) {
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90 idx--;
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91 }
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92 }
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93
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94 double day = 0d;
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95 int mod = (wIncreases) ? -1 : +1;
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96 if (idx != 0 && idx <= wqday.size()-1) {
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97 day = Linear.linear(w, wqday.getW(idx+mod), wqday.getW(idx),
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98 wqday.getDay(idx+mod), wqday.getDay(idx));
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99 }
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100
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101 return new Point2D.Double((double) day, w);
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102 }
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103 logger.warn("not wqkms / w / day found");
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104 // TODO better signal failure.
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105 return new Point2D.Double(0d, 0d);
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106 }
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107
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108
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109 /**
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110 * Calculate a reference curve point, that is, a point made of
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111 * the Ws from start and end km param of the reference curve.
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112 */
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113 public Point2D calculateReferenceCurvePoint(CallContext context,
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114 WKms wKms) {
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115
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116 List<DataProvider> providers = context.
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117 getDataProvider(ReferenceCurveFacet.BB_REFERENCECURVE_STARTKM);
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118 if (providers.size() < 1) {
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119 logger.warn("Could not find reference curve startkm data provider.");
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120 }
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121
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122 Double start = (Double) providers.get(0).
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123 provideData(ReferenceCurveFacet.BB_REFERENCECURVE_STARTKM, null, context);
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124
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125 providers = context.
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126 getDataProvider(ReferenceCurveFacet.BB_REFERENCECURVE_ENDKMS);
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127 if (providers.size() < 1) {
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128 logger.warn("Could not find reference curve endkms data provider.");
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129 }
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130 double[] ends = (double[]) providers.get(0).
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131 provideData(ReferenceCurveFacet.BB_REFERENCECURVE_ENDKMS, null, context);
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132
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133 logger.debug("Got s " + start + " e " + ends);
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134
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135 double startW = StaticWKmsArtifact.getWAtKmLin(wKms, start.doubleValue());
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136 // TODO handle multiple ends.
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137 double endW = StaticWKmsArtifact.getWAtKmLin(wKms, ends[0]);
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138 logger.debug("Gotw s " + startW + " e " + endW);
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139 return new Point2D.Double(startW, endW);
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140 }
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141
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142
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143 /**
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144 * Returns the data this facet requires.
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145 *
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146 * @param artifact the owner artifact.
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147 * @param context the CallContext (ignored).
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148 *
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149 * @return the data.
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150 */
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151 @Override
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152 public Object getData(Artifact artifact, CallContext context) {
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153 WKms wKms = null;
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154 if (artifact instanceof StaticWKmsArtifact) {
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155 wKms = ((StaticWKmsArtifact) artifact).getWKms(0);
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156 }
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157 else if (artifact instanceof StaticWQKmsArtifact) {
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158 wKms = ((StaticWQKmsArtifact) artifact).getWQKms();
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159 }
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160 else {
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161 logger.error("Cannot handle Artifact to create relative point.");
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162 return null;
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163 }
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164
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165 // Find out whether we live in a duration curve context, there we would
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166 // provide only a single point.
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167
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168 if (context.getDataProvider(
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169 DurationCurveFacet.BB_DURATIONCURVE_KM).size() > 0) {
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170 return calculateDurationCurvePoint(context, wKms);
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171 }
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172 else if (context.getDataProvider(
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173 ReferenceCurveFacet.BB_REFERENCECURVE_STARTKM).size() > 0) {
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174 return calculateReferenceCurvePoint(context, wKms);
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175 }
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176
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177 // TODO better signal failure.
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178 return new Point2D.Double(0d, 0d);
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179 }
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180
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181
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182 /**
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183 * Create a deep copy of this Facet.
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184 * @return a deep copy.
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185 */
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186 @Override
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187 public RelativePointFacet deepCopy() {
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188 RelativePointFacet copy = new RelativePointFacet(description);
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189 copy.set(this);
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190 return copy;
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191 }
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192 }
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193 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org