Mercurial > dive4elements > gnv-client
annotate gnv-artifacts/src/main/java/de/intevation/gnv/raster/JTSMultiLineStringProducer.java @ 622:89aca25642d6
Implemented method stubs of MapfileGenerator. Mapfiles are successfully created corresponding meta.xml files.
gnv-artifacts/trunk@693 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 19 Feb 2010 13:28:34 +0000 |
parents | 70adafe2b9d5 |
children | b1f5f2a8840f |
rev | line source |
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1 package de.intevation.gnv.raster; |
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2 |
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3 import com.vividsolutions.jts.geom.Coordinate; |
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4 import com.vividsolutions.jts.geom.Geometry; |
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5 import com.vividsolutions.jts.geom.GeometryFactory; |
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6 import com.vividsolutions.jts.geom.LineString; |
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7 import com.vividsolutions.jts.geom.MultiLineString; |
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8 import com.vividsolutions.jts.geom.Polygon; |
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9 import com.vividsolutions.jts.geom.TopologyException; |
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10 |
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11 import de.intevation.gnv.math.IJKey; |
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12 |
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13 import de.intevation.gnv.raster.Vectorizer.Edge; |
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14 |
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15 import de.intevation.gnv.utils.Pair; |
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16 |
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17 import gnu.trove.TIntObjectHashMap; |
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18 |
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19 import java.util.ArrayList; |
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20 import java.util.List; |
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21 |
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22 import org.apache.log4j.Logger; |
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23 /** |
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24 * @author Sascha L. Teichmann (sascha.teichmann@intevation.de) |
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25 */ |
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26 public class JTSMultiLineStringProducer |
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27 extends IsoProducer |
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28 { |
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29 private static Logger log = Logger.getLogger( |
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30 JTSMultiLineStringProducer.class); |
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31 |
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32 protected GeometryFactory geometryFactory; |
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33 |
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34 protected Polygon clip; |
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35 |
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36 public JTSMultiLineStringProducer( |
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37 Polygon clip, |
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38 double minX, double minY, |
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39 double maxX, double maxY |
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40 ) { |
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41 this( |
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42 clip, |
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43 // XXX: Geotools crashes if only using a 2d packed data format! |
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44 JTSMultiPolygonProducer.createDefaultGeometryFactory(3), |
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45 minX, minY, |
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46 maxX, maxY); |
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47 } |
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48 |
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49 public JTSMultiLineStringProducer( |
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50 Polygon clip, |
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51 GeometryFactory geometryFactory, |
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52 double minX, double minY, |
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53 double maxX, double maxY |
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54 ) { |
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55 super(minX, minY, maxX, maxY); |
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56 this.clip = clip; |
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57 this.geometryFactory = geometryFactory; |
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58 } |
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59 |
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60 protected void clipLineString( |
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61 LineString lineString, |
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62 ArrayList<LineString> lineStrings |
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63 ) { |
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64 if (clip == null) { |
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65 lineStrings.add(lineString); |
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66 return; |
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67 } |
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68 |
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69 if (!lineString.intersects(clip)) { |
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70 return; |
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71 } |
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72 |
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73 try { |
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74 Geometry result = lineString.intersection(clip); |
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75 |
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76 if (result instanceof LineString) { |
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77 lineStrings.add((LineString)result); |
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78 } |
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79 else if (result instanceof MultiLineString) { |
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80 MultiLineString mls = (MultiLineString)result; |
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81 for (int i = 0, N = mls.getNumGeometries(); i < N; ++i) { |
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82 Geometry g = mls.getGeometryN(i); |
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83 if (g instanceof LineString) { |
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84 lineStrings.add((LineString)g); |
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85 } |
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86 else { |
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87 log.warn("cannot handle geometry " + g.getClass()); |
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88 } |
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89 } |
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90 } |
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91 else { |
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92 log.warn("cannot handle " + result.getClass()); |
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93 } |
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94 } |
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95 catch (TopologyException te) { |
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96 log.error(te.getLocalizedMessage(), te); |
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97 lineStrings.add(lineString); |
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98 } |
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99 } |
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100 |
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101 public List<Pair<Object, MultiLineString>> getMultiLineStrings( |
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102 AttributeGenerator attributeGenerator |
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103 ) { |
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104 ArrayList<Pair<Object, MultiLineString>> multiLineStrings = |
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105 new ArrayList<Pair<Object, MultiLineString>>(); |
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106 |
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107 double b1 = minX; |
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108 double m1 = width != 1 |
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109 ? (maxX - minX)/(width-1) |
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110 : 0d; |
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111 |
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112 double b2 = minY; |
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113 double m2 = height != 1 |
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114 ? (maxY - minY)/(height-1) |
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115 : 0d; |
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116 |
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117 ArrayList<Coordinate> coordinates = new ArrayList<Coordinate>(); |
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118 |
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119 for (IJKey key: joinPairs()) { |
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120 ArrayList<LineString> lineStrings = new ArrayList<LineString>(); |
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121 |
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122 // process complete |
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123 ArrayList<Edge> completeList = complete.get(key); |
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124 if (completeList != null) { |
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125 for (Edge head: completeList) { |
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126 Edge current = head; |
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127 do { |
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128 coordinates.add(new Coordinate( |
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129 m1*(current.a % width) + b1, |
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130 m2*(current.a / width) + b2)); |
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131 } |
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132 while ((current = current.next) != head); |
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133 // add head again to close shape |
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134 coordinates.add(new Coordinate( |
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135 m1*(head.a % width) + b1, |
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136 m2*(head.a / width) + b2)); |
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137 |
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138 clipLineString( |
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139 geometryFactory.createLineString( |
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140 coordinates.toArray( |
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141 new Coordinate[coordinates.size()])), |
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142 lineStrings); |
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143 |
465
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144 coordinates.clear(); |
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145 } |
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146 } |
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147 |
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148 // process open |
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149 TIntObjectHashMap map = commonOpen.get(key); |
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150 |
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151 if (map != null) { |
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152 for (Edge head: headList(map)) { |
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153 |
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154 head = Vectorizer.simplify(head, width); |
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155 Edge current = head, last = head; |
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156 do { |
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157 coordinates.add(new Coordinate( |
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158 m1*(current.a % width) + b1, |
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159 m2*(current.a / width) + b2)); |
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160 last = current; |
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161 } |
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162 while ((current = current.next) != null); |
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163 // add b from tail |
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164 coordinates.add(new Coordinate( |
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165 m1*(last.b % width) + b1, |
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166 m2*(last.b / width) + b2)); |
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167 |
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168 clipLineString( |
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169 geometryFactory.createLineString( |
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170 coordinates.toArray( |
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171 new Coordinate[coordinates.size()])), |
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172 lineStrings); |
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173 |
465
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174 coordinates.clear(); |
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175 } // for all in common open |
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176 } // if map defined for key |
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177 |
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178 if (!lineStrings.isEmpty()) { |
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179 MultiLineString multiLineString = |
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180 geometryFactory.createMultiLineString( |
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181 lineStrings.toArray( |
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182 new LineString[lineStrings.size()])); |
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183 lineStrings.clear(); |
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184 Object attribute = attributeGenerator != null |
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185 ? attributeGenerator.generateAttribute(key.i, key.j) |
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186 : key; |
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187 multiLineStrings.add(new Pair<Object, MultiLineString>( |
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188 attribute, |
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189 multiLineString)); |
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190 } |
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191 } // for all pairs |
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192 |
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193 return multiLineStrings; |
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194 } |
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195 } |
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196 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |