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 / SHPPolygon.java @ 40559
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1 | 40559 | jjdelcerro | /**
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2 | * gvSIG. Desktop Geographic Information System.
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3 | 40435 | jjdelcerro | *
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4 | 40559 | jjdelcerro | * Copyright (C) 2007-2013 gvSIG Association.
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5 | 40435 | jjdelcerro | *
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6 | * This program is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU General Public License
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8 | 40559 | jjdelcerro | * as published by the Free Software Foundation; either version 3
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9 | 40435 | jjdelcerro | * of the License, or (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | 40559 | jjdelcerro | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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19 | * MA 02110-1301, USA.
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20 | 40435 | jjdelcerro | *
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21 | 40559 | jjdelcerro | * For any additional information, do not hesitate to contact us
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22 | * at info AT gvsig.com, or visit our website www.gvsig.com.
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23 | 40435 | jjdelcerro | */
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24 | package org.gvsig.fmap.dal.store.shp.utils; |
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25 | |||
26 | import java.awt.geom.Rectangle2D; |
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27 | import java.nio.ByteBuffer; |
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28 | import java.nio.MappedByteBuffer; |
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29 | |||
30 | import org.gvsig.fmap.geom.Geometry; |
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31 | import org.gvsig.fmap.geom.GeometryLocator; |
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32 | import org.gvsig.fmap.geom.GeometryManager; |
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33 | import org.gvsig.fmap.geom.Geometry.SUBTYPES; |
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34 | import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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35 | import org.gvsig.fmap.geom.primitive.Envelope; |
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36 | import org.gvsig.fmap.geom.primitive.Point; |
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37 | import org.slf4j.Logger; |
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38 | import org.slf4j.LoggerFactory; |
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39 | |||
40 | /**
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41 | * Elemento shape de tipo Pol?gono.
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42 | *
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43 | * @author Vicente Caballero Navarro
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44 | */
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45 | public class SHPPolygon extends SHPMultiLine { |
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46 | private static final GeometryManager geomManager = GeometryLocator.getGeometryManager(); |
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47 | private static final Logger logger = LoggerFactory.getLogger(SHPPolygon.class); |
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48 | |||
49 | /**
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50 | * Crea un nuevo SHPPolygon.
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51 | */
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52 | public SHPPolygon() {
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53 | m_type = SHP.POLYGON2D; |
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54 | } |
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55 | |||
56 | /**
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57 | * Crea un nuevo SHPPolygon.
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58 | *
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59 | * @param type Tipo de shape.
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60 | *
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61 | * @throws ShapefileException
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62 | */
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63 | public SHPPolygon(int type) { |
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64 | if ((type != SHP.POLYGON2D) &&
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65 | (type != SHP.POLYGONM) && |
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66 | (type != SHP.POLYGON3D)) { |
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67 | // throw new ShapefileException("No es de tipo 5, 15, o 25");
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68 | } |
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69 | |||
70 | m_type = type; |
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71 | } |
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72 | |||
73 | /**
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74 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#getShapeType()
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75 | */
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76 | public int getShapeType() { |
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77 | return m_type;
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78 | } |
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79 | |||
80 | /**
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81 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#read(MappedByteBuffer, int)
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82 | */
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83 | public synchronized Geometry read(MappedByteBuffer buffer, int type) { |
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84 | double minX = buffer.getDouble();
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85 | double minY = buffer.getDouble();
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86 | double maxX = buffer.getDouble();
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87 | double maxY = buffer.getDouble();
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88 | Rectangle2D rec = new Rectangle2D.Double(minX, minY, maxX - minX, |
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89 | maxY - maxY); |
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90 | int numParts = buffer.getInt();
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91 | int numPoints = buffer.getInt();
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92 | |||
93 | int[] partOffsets = new int[numParts]; |
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94 | |||
95 | for (int i = 0; i < numParts; i++) { |
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96 | partOffsets[i] = buffer.getInt(); |
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97 | } |
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98 | |||
99 | Point[] points = readPoints(buffer, numPoints); |
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100 | |||
101 | /* if (m_type == FConstant.SHAPE_TYPE_POLYGONZ) {
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102 | //z
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103 | buffer.position(buffer.position() + (2 * 8));
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104 | for (int t = 0; t < numPoints; t++) {
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105 | points[t].z = buffer.getDouble();
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106 | }
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107 | }
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108 | */
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109 | int offset = 0; |
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110 | int start;
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111 | int finish;
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112 | int length;
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113 | |||
114 | for (int part = 0; part < numParts; part++) { |
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115 | start = partOffsets[part]; |
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116 | |||
117 | if (part == (numParts - 1)) { |
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118 | finish = numPoints; |
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119 | } else {
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120 | finish = partOffsets[part + 1];
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121 | } |
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122 | |||
123 | length = finish - start; |
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124 | |||
125 | Point[] pointsPart = new Point[length]; |
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126 | |||
127 | for (int i = 0; i < length; i++) { |
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128 | pointsPart[i] = points[offset++]; |
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129 | } |
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130 | } |
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131 | |||
132 | try {
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133 | return geomManager.createSurface(getGeneralPathX(points, partOffsets), SUBTYPES.GEOM2D);
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134 | } catch (CreateGeometryException e) {
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135 | logger.error("Error creating a surface", e);
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136 | return null; |
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137 | } |
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138 | } |
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139 | |||
140 | /**
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141 | * Lee los puntos del buffer.
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142 | *
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143 | * @param buffer
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144 | * @param numPoints N?mero de puntos.
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145 | *
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146 | * @return Vector de Puntos.
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147 | */
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148 | private synchronized Point[] readPoints(final MappedByteBuffer buffer, |
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149 | final int numPoints) { |
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150 | Point[] points = new Point[numPoints]; |
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151 | |||
152 | for (int t = 0; t < numPoints; t++) { |
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153 | try {
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154 | points[t] = geomManager.createPoint(buffer.getDouble(), buffer.getDouble(), SUBTYPES.GEOM2D); |
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155 | } catch (CreateGeometryException e) {
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156 | logger.error("Error creating a point", e);
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157 | } |
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158 | } |
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159 | |||
160 | return points;
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161 | } |
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162 | |||
163 | /**
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164 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#write(ByteBuffer, IGeometry)
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165 | */
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166 | public synchronized void write(ByteBuffer buffer, Geometry geometry) { |
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167 | Envelope env = geometry.getEnvelope(); |
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168 | |||
169 | buffer.putDouble(env.getMinimum(0));
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170 | buffer.putDouble(env.getMinimum(1));
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171 | buffer.putDouble(env.getMaximum(0));
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172 | buffer.putDouble(env.getMaximum(1));
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173 | |||
174 | int nparts = parts.length;
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175 | int npoints = points.length;
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176 | |||
177 | buffer.putInt(nparts); |
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178 | buffer.putInt(npoints); |
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179 | |||
180 | for (int t = 0; t < nparts; t++) { |
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181 | buffer.putInt(parts[t]); |
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182 | } |
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183 | |||
184 | for (int t = 0; t < points.length; t++) { |
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185 | buffer.putDouble(points[t].getX()); |
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186 | buffer.putDouble(points[t].getY()); |
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187 | } |
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188 | |||
189 | if (m_type == SHP.POLYGON3D) {
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190 | double[] zExtreame = SHP.getZMinMax(zs); |
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191 | if (Double.isNaN(zExtreame[0])) { |
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192 | buffer.putDouble(0.0);
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193 | buffer.putDouble(0.0);
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194 | } else {
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195 | buffer.putDouble(zExtreame[0]);
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196 | buffer.putDouble(zExtreame[1]);
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197 | } |
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198 | for (int t = 0; t < npoints; t++) { |
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199 | double z = zs[t];
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200 | if (Double.isNaN(z)) { |
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201 | buffer.putDouble(0.0);
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202 | } else {
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203 | buffer.putDouble(z); |
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204 | } |
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205 | } |
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206 | } |
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207 | |||
208 | if ((m_type == SHP.POLYGONM)) {
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209 | buffer.putDouble(-10E40);
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210 | buffer.putDouble(-10E40);
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211 | |||
212 | for (int t = 0; t < npoints; t++) { |
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213 | buffer.putDouble(-10E40);
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214 | } |
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215 | } |
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216 | } |
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217 | |||
218 | /**
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219 | * @see com.iver.cit.gvsig.fmap.shp.SHPShape#getLength(com.iver.cit.gvsig.core.BasicShape.FGeometry)
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220 | */
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221 | public synchronized int getLength(Geometry fgeometry) { |
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222 | int npoints = points.length;
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223 | |||
224 | int length;
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225 | |||
226 | if (m_type == SHP.POLYGON3D || m_type == SHP.POLYGONM) {
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227 | length = 44 + (4 * parts.length) + (16 * npoints) + (8 * npoints) + 16; |
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228 | } else if (m_type == SHP.POLYGON2D) { |
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229 | length = 44 + (4 * parts.length) + (16 * npoints); |
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230 | } else {
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231 | throw new IllegalStateException("Expected ShapeType of Polygon, got " + m_type); |
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232 | } |
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233 | |||
234 | return length;
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235 | } |
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236 | } |