svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.compat.cdc / org.gvsig.fmap.dal / org.gvsig.fmap.dal.file / org.gvsig.fmap.dal.file.shp / src / main / java / org / gvsig / fmap / dal / store / shp / utils / SHPReader2D.java @ 42811
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1 | 42311 | fdiaz | /* gvSIG. Desktop Geographic Information System.
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2 | *
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3 | * Copyright ? 2007-2015 gvSIG Association
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4 | *
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5 | * This program is free software; you can redistribute it and/or
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6 | * modify it under the terms of the GNU General Public License
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7 | * as published by the Free Software Foundation; either version 2
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8 | * of the License, or (at your option) any later version.
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9 | *
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10 | * This program is distributed in the hope that it will be useful,
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11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 | * GNU General Public License for more details.
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14 | *
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15 | * You should have received a copy of the GNU General Public License
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16 | * along with this program; if not, write to the Free Software
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17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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18 | * MA 02110-1301, USA.
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19 | *
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20 | * For any additional information, do not hesitate to contact us
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21 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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22 | */
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23 | package org.gvsig.fmap.dal.store.shp.utils; |
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24 | |||
25 | import java.nio.ByteOrder; |
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26 | 42811 | jjdelcerro | import org.gvsig.fmap.dal.store.shp.SHPStoreParameters; |
27 | 42311 | fdiaz | |
28 | import org.gvsig.fmap.geom.Geometry; |
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29 | import org.gvsig.fmap.geom.GeometryLocator; |
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30 | import org.gvsig.fmap.geom.GeometryManager; |
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31 | import org.gvsig.fmap.geom.aggregate.MultiLine; |
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32 | import org.gvsig.fmap.geom.aggregate.MultiPoint; |
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33 | import org.gvsig.fmap.geom.aggregate.MultiPolygon; |
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34 | import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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35 | import org.gvsig.fmap.geom.operation.GeometryOperationException; |
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36 | import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException; |
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37 | import org.gvsig.fmap.geom.primitive.Line; |
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38 | import org.gvsig.fmap.geom.primitive.Point; |
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39 | import org.gvsig.fmap.geom.primitive.Polygon; |
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40 | import org.gvsig.fmap.geom.primitive.Ring; |
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41 | import org.gvsig.utils.bigfile.BigByteBuffer2; |
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42 | |||
43 | |||
44 | /**
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45 | * @author fdiaz
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46 | *
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47 | */
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48 | public class SHPReader2D extends AbstractSHPReader { |
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49 | |||
50 | /**
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51 | *
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52 | */
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53 | 42811 | jjdelcerro | public SHPReader2D(SHPStoreParameters params) {
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54 | super(params);
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55 | 42311 | fdiaz | } |
56 | |||
57 | /* (non-Javadoc)
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58 | * @see org.gvsig.fmap.dal.store.shp.utils.SHPReader#readPoint(org.gvsig.utils.bigfile.BigByteBuffer2)
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59 | */
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60 | public Geometry readPoint(BigByteBuffer2 bb) throws CreateGeometryException{ |
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61 | // bytes 1 to 4 are the type and have already been read.
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62 | // bytes 4 to 12 are the X coordinate
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63 | GeometryManager gManager = GeometryLocator.getGeometryManager(); |
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64 | bb.order(ByteOrder.LITTLE_ENDIAN);
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65 | double x = bb.getDouble();
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66 | double y = bb.getDouble();
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67 | Point p = (Point) gManager.create(Geometry.TYPES.POINT, Geometry.SUBTYPES.GEOM2D); |
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68 | p.setX(x); |
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69 | p.setY(y); |
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70 | return p;
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71 | } |
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72 | |||
73 | /* (non-Javadoc)
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74 | * @see org.gvsig.fmap.dal.store.shp.utils.SHPReader#readPoLyline(org.gvsig.utils.bigfile.BigByteBuffer2)
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75 | */
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76 | public Geometry readPoLyline(BigByteBuffer2 bb) throws CreateGeometryException { |
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77 | |||
78 | GeometryManager gManager = GeometryLocator.getGeometryManager(); |
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79 | |||
80 | Point p = null; |
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81 | int numParts;
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82 | int numPoints;
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83 | int i;
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84 | int j;
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85 | |||
86 | bb.position(bb.position() + 32);
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87 | numParts = bb.getInt(); |
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88 | numPoints = bb.getInt(); |
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89 | |||
90 | int[] tempParts = new int[numParts]; |
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91 | |||
92 | MultiLine multiLine = null;
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93 | Line line = null; |
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94 | if (numParts > 1) { |
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95 | multiLine = (MultiLine) gManager.create(Geometry.TYPES.MULTILINE, Geometry.SUBTYPES.GEOM2D); |
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96 | } |
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97 | |||
98 | for (i = 0; i < numParts; i++) { |
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99 | tempParts[i] = bb.getInt(); |
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100 | } |
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101 | |||
102 | j = 0;
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103 | |||
104 | for (i = 0; i < numPoints; i++) { |
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105 | p = (Point) readPoint(bb);
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106 | |||
107 | if (i == tempParts[j]) {
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108 | if(multiLine!=null && line != null){ |
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109 | multiLine.addCurve(line); |
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110 | } |
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111 | line = (Line) gManager.create(Geometry.TYPES.LINE, Geometry.SUBTYPES.GEOM2D);
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112 | if (j < (numParts - 1)) { |
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113 | j++; |
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114 | } |
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115 | } |
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116 | line.addVertex(p); |
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117 | } |
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118 | if (multiLine != null) { |
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119 | multiLine.addCurve(line); |
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120 | return multiLine;
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121 | } else {
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122 | return line;
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123 | } |
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124 | } |
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125 | |||
126 | /* (non-Javadoc)
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127 | * @see org.gvsig.fmap.dal.store.shp.utils.SHPReader#readPoLygon(org.gvsig.utils.bigfile.BigByteBuffer2)
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128 | */
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129 | public Geometry readPoLygon(BigByteBuffer2 bb) throws CreateGeometryException, GeometryOperationNotSupportedException, GeometryOperationException { |
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130 | |||
131 | GeometryManager gManager = GeometryLocator.getGeometryManager(); |
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132 | |||
133 | Point p = null; |
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134 | int numParts;
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135 | int numPoints;
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136 | int i;
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137 | |||
138 | bb.position(bb.position() + 32);
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139 | numParts = bb.getInt(); |
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140 | numPoints = bb.getInt(); |
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141 | |||
142 | int[] tempParts = new int[numParts]; |
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143 | |||
144 | for (i = 0; i < numParts; i++) { |
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145 | tempParts[i] = bb.getInt(); |
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146 | } |
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147 | |||
148 | MultiPolygon multipolygon = null;
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149 | Polygon polygon = null; |
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150 | Ring ring = null;
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151 | |||
152 | int pointsCounter = 0; |
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153 | for(int part=0; part<numParts; part++){ |
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154 | ring = (Ring) gManager.create(Geometry.TYPES.RING, Geometry.SUBTYPES.GEOM2D); |
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155 | int lastPoint = numPoints;
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156 | if(part<numParts-1){ |
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157 | lastPoint = tempParts[part+1];
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158 | } |
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159 | while(pointsCounter<lastPoint){
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160 | p = (Point) readPoint(bb);
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161 | ring.addVertex(p); |
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162 | pointsCounter++; |
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163 | } |
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164 | ring.closePrimitive(); |
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165 | 42811 | jjdelcerro | checkNumVerticesOfRing(ring); |
166 | 42311 | fdiaz | if (ring.isCCW() && polygon!=null) { |
167 | // Los anillos interiores deben ser CCW pero si encontramos un
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168 | // anillo interior que no est? envuelto en un pol?gono
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169 | // consideramos que es un pol?gono en s? y nos aseguramos de
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170 | // darle la vuelta (en el else)
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171 | //FIXME: Comprobar que este es el comportamiento deseado
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172 | polygon.addInteriorRing(ring); |
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173 | } else {
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174 | if(polygon!=null){ |
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175 | if(multipolygon==null){ |
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176 | multipolygon = (MultiPolygon) gManager.create(Geometry.TYPES.MULTIPOLYGON, Geometry.SUBTYPES.GEOM2D); |
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177 | } |
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178 | multipolygon.addPrimitive(polygon); |
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179 | } |
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180 | polygon = (Polygon) gManager.create(Geometry.TYPES.POLYGON, Geometry.SUBTYPES.GEOM2D);
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181 | polygon.ensureCapacity(ring.getNumVertices()); |
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182 | if(ring.isCCW()){
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183 | //To ensure CW orientation for polygons
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184 | for (int v = ring.getNumVertices()-1; v >=0; v--) { |
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185 | polygon.addVertex(ring.getVertex(v)); |
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186 | } |
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187 | } else {
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188 | for (int v = 0; v < ring.getNumVertices(); v++) { |
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189 | polygon.addVertex(ring.getVertex(v)); |
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190 | } |
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191 | } |
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192 | } |
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193 | } |
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194 | |||
195 | if (multipolygon != null) { |
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196 | multipolygon.addPrimitive(polygon); |
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197 | return multipolygon;
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198 | } else {
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199 | return polygon;
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200 | } |
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201 | } |
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202 | |||
203 | /* (non-Javadoc)
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204 | * @see org.gvsig.fmap.dal.store.shp.utils.SHPReader#readMultiPoint(org.gvsig.utils.bigfile.BigByteBuffer2)
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205 | */
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206 | public Geometry readMultiPoint(BigByteBuffer2 bb) throws CreateGeometryException { |
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207 | |||
208 | GeometryManager gManager = GeometryLocator.getGeometryManager(); |
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209 | |||
210 | int numPoints;
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211 | bb.position(bb.position() + 32);
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212 | numPoints = bb.getInt(); |
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213 | |||
214 | MultiPoint multipoint = gManager.createMultiPoint(Geometry.SUBTYPES.GEOM2D); |
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215 | |||
216 | for (int i = 0; i < numPoints; i++) { |
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217 | multipoint.addPoint((Point)readPoint(bb));
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218 | } |
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219 | return multipoint;
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220 | } |
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221 | |||
222 | } |