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annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/RelativePointFacet.java @ 5797:cce12c06466f

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RelativePointFacet: Through minor refactoring prepared to used StaticWQKmsArtifact.
author Felix Wolfsteller <felix.wolfsteller@intevation.de>
date Wed, 24 Apr 2013 08:17:18 +0200
parents cd5eb8f5f6f1
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