gvsig-geoprocess / org.gvsig.sextante / trunk / org.gvsig.sextante.app / org.gvsig.sextante.app.algorithm / org.gvsig.sextante.app.algorithm.base / src / main / java / org / gvsig / sextante / app / algorithm / base / core / ScalableUnionOperation.java @ 30
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1 | 28 | nbrodin | /*
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2 | * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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3 | *
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4 | * Copyright (C) 2010 Generalitat Valenciana.
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5 | *
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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 | * as published by the Free Software Foundation; either version 2
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9 | * 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 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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19 | *
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20 | */
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21 | package org.gvsig.sextante.app.algorithm.base.core; |
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22 | |||
23 | import java.util.Iterator; |
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24 | import java.util.List; |
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25 | |||
26 | import org.gvsig.fmap.dal.exception.DataException; |
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27 | import org.gvsig.fmap.dal.feature.DisposableIterator; |
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28 | import org.gvsig.fmap.dal.feature.Feature; |
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29 | import org.gvsig.fmap.dal.feature.FeatureSet; |
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30 | import org.gvsig.fmap.dal.feature.FeatureStore; |
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31 | 30 | nbrodin | import org.gvsig.fmap.geom.GeometryLocator; |
32 | import org.gvsig.fmap.geom.GeometryManager; |
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33 | 28 | nbrodin | import org.gvsig.fmap.geom.Geometry.TYPES; |
34 | 30 | nbrodin | import org.gvsig.fmap.geom.operation.GeometryOperationContext; |
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.operation.fromjts.FromJTS; |
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38 | import org.gvsig.fmap.geom.operation.tojts.ToJTS; |
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39 | 28 | nbrodin | import org.gvsig.sextante.app.algorithm.base.util.JTSFacade; |
40 | import org.gvsig.sextante.app.algorithm.base.visitor.exception.VisitorException; |
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41 | import org.gvsig.sextante.app.extension.core.gvVectorLayer; |
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42 | |||
43 | import com.vividsolutions.jts.geom.Geometry; |
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44 | |||
45 | import es.unex.sextante.core.Sextante; |
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46 | import es.unex.sextante.dataObjects.IVectorLayer; |
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47 | import es.unex.sextante.exceptions.NullParameterValueException; |
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48 | import es.unex.sextante.exceptions.WrongParameterIDException; |
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49 | import es.unex.sextante.exceptions.WrongParameterTypeException; |
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50 | |||
51 | /**
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52 | * Union operation between two geometries.
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53 | * @author Nacho Brodin (nachobrodin@gmail.com)
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54 | */
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55 | public class ScalableUnionOperation { |
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56 | //geometry type of the layer whose features we are going to fussion
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57 | //(polygon features are optimized in jts with buffer(0) trick, the
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58 | //nor the rest
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59 | 30 | nbrodin | private Geometry geometry = null; |
60 | private GeometryManager geometryManager = null; |
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61 | 28 | nbrodin | |
62 | 30 | nbrodin | public ScalableUnionOperation() {
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63 | geometryManager = GeometryLocator.getGeometryManager(); |
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64 | } |
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65 | |||
66 | 28 | nbrodin | /**
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67 | * Returns FMap convex hull geometry.
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68 | * @return
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69 | */
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70 | public org.gvsig.fmap.geom.Geometry getGeometry() {
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71 | 30 | nbrodin | GeometryOperationContext ctx = new GeometryOperationContext();
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72 | ctx.setAttribute(FromJTS.PARAM, geometry); |
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73 | 28 | nbrodin | try {
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74 | 30 | nbrodin | return (org.gvsig.fmap.geom.Geometry)geometryManager.invokeOperation(FromJTS.NAME, ctx);
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75 | } catch (GeometryOperationNotSupportedException e) {
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76 | Sextante.addErrorToLog(e); |
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77 | 28 | nbrodin | return null; |
78 | 30 | nbrodin | } catch (GeometryOperationException e) {
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79 | Sextante.addErrorToLog(e); |
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80 | return null; |
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81 | 28 | nbrodin | } |
82 | } |
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83 | |||
84 | public org.gvsig.fmap.geom.Geometry invoke(org.gvsig.fmap.geom.Geometry g, int geometryType) { |
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85 | if(g == null) |
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86 | return null; |
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87 | |||
88 | if(g.getGeometryType().getType() != TYPES.SURFACE)
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89 | return null; |
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90 | |||
91 | 30 | nbrodin | com.vividsolutions.jts.geom.Geometry actualGeometry = null;
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92 | try {
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93 | actualGeometry = (Geometry)g.invokeOperation(ToJTS.CODE, null);
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94 | } catch (GeometryOperationNotSupportedException e1) {
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95 | Sextante.addErrorToLog(e1); |
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96 | } catch (GeometryOperationException e1) {
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97 | Sextante.addErrorToLog(e1); |
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98 | } |
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99 | |||
100 | 28 | nbrodin | if(geometry == null){ |
101 | geometry = actualGeometry; |
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102 | }else{
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103 | Geometry[] geoms = new Geometry[2]; |
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104 | geoms[0] = geometry;
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105 | geoms[1] = actualGeometry;
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106 | |||
107 | geometry = JTSFacade.union(geoms, geometryType); |
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108 | } |
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109 | return getGeometry();
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110 | } |
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111 | |||
112 | /**
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113 | * Computes union of all geometries of the clipping layer. The input resources won't
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114 | * be released.
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115 | *
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116 | * @return one geometry
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117 | * @throws NullParameterValueException
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118 | * @throws WrongParameterIDException
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119 | * @throws WrongParameterTypeException
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120 | * @throws com.iver.cit.gvsig.fmap.DriverException
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121 | * @throws ReadDriverException
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122 | * @throws VisitorException
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123 | * @throws ExpansionFileReadException
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124 | */
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125 | @SuppressWarnings("unchecked") |
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126 | public static org.gvsig.fmap.geom.Geometry joinLayerGeometries(IVectorLayer input) throws WrongParameterTypeException, WrongParameterIDException, NullParameterValueException { |
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127 | ScalableUnionOperation operation = new ScalableUnionOperation();
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128 | |||
129 | FeatureStore store = null;
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130 | |||
131 | if(input instanceof gvVectorLayer) |
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132 | store = ((gvVectorLayer)input).getFeatureStore(); |
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133 | else
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134 | return null; |
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135 | |||
136 | FeatureSet features = null;
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137 | try {
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138 | features = store.getFeatureSet(); |
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139 | DisposableIterator it = features.iterator(); |
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140 | while( it.hasNext() ) {
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141 | Feature feature = (Feature)it.next(); |
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142 | List geomList = feature.getGeometries();
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143 | if(geomList == null) { |
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144 | org.gvsig.fmap.geom.Geometry geom = feature.getDefaultGeometry(); |
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145 | if(geom != null) |
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146 | operation.invoke(geom, geom.getType()); |
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147 | continue;
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148 | } |
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149 | Iterator<org.gvsig.fmap.geom.Geometry> itGeom = geomList.iterator();
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150 | while(itGeom.hasNext()) {
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151 | org.gvsig.fmap.geom.Geometry g = itGeom.next(); |
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152 | operation.invoke(g, g.getType()); |
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153 | } |
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154 | } |
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155 | return operation.getGeometry();
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156 | } catch (DataException e) {
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157 | Sextante.addErrorToLog(e); |
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158 | } |
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159 | return null; |
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160 | } |
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161 | } |