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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/*
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* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana
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*
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* Copyright (C) 2010 Generalitat Valenciana.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,USA.
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*
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*/
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package org.gvsig.sextante.app.algorithm.base.core; |
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import java.util.Iterator; |
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import java.util.List; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.feature.DisposableIterator; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureSet; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.geom.GeometryLocator; |
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import org.gvsig.fmap.geom.GeometryManager; |
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import org.gvsig.fmap.geom.Geometry.TYPES; |
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import org.gvsig.fmap.geom.operation.GeometryOperationContext; |
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import org.gvsig.fmap.geom.operation.GeometryOperationException; |
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import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException; |
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import org.gvsig.fmap.geom.operation.fromjts.FromJTS; |
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import org.gvsig.fmap.geom.operation.tojts.ToJTS; |
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import org.gvsig.sextante.app.algorithm.base.util.JTSFacade; |
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import org.gvsig.sextante.app.algorithm.base.visitor.exception.VisitorException; |
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import org.gvsig.sextante.app.extension.core.gvVectorLayer; |
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import com.vividsolutions.jts.geom.Geometry; |
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import es.unex.sextante.core.Sextante; |
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import es.unex.sextante.dataObjects.IVectorLayer; |
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import es.unex.sextante.exceptions.NullParameterValueException; |
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import es.unex.sextante.exceptions.WrongParameterIDException; |
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import es.unex.sextante.exceptions.WrongParameterTypeException; |
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/**
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* Union operation between two geometries.
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class ScalableUnionOperation { |
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//geometry type of the layer whose features we are going to fussion
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//(polygon features are optimized in jts with buffer(0) trick, the
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//nor the rest
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private Geometry geometry = null; |
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private GeometryManager geometryManager = null; |
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public ScalableUnionOperation() {
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geometryManager = GeometryLocator.getGeometryManager(); |
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} |
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/**
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* Returns FMap convex hull geometry.
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* @return
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*/
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public org.gvsig.fmap.geom.Geometry getGeometry() {
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GeometryOperationContext ctx = new GeometryOperationContext();
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ctx.setAttribute(FromJTS.PARAM, geometry); |
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try {
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return (org.gvsig.fmap.geom.Geometry)geometryManager.invokeOperation(FromJTS.NAME, ctx);
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} catch (GeometryOperationNotSupportedException e) {
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Sextante.addErrorToLog(e); |
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return null; |
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} catch (GeometryOperationException e) {
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Sextante.addErrorToLog(e); |
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return null; |
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} |
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} |
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public org.gvsig.fmap.geom.Geometry invoke(org.gvsig.fmap.geom.Geometry g, int geometryType) { |
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if(g == null) |
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return null; |
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if(g.getGeometryType().getType() != TYPES.SURFACE)
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return null; |
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com.vividsolutions.jts.geom.Geometry actualGeometry = null;
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try {
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actualGeometry = (Geometry)g.invokeOperation(ToJTS.CODE, null);
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} catch (GeometryOperationNotSupportedException e1) {
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Sextante.addErrorToLog(e1); |
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} catch (GeometryOperationException e1) {
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Sextante.addErrorToLog(e1); |
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} |
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if(geometry == null){ |
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geometry = actualGeometry; |
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}else{
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Geometry[] geoms = new Geometry[2]; |
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geoms[0] = geometry;
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geoms[1] = actualGeometry;
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geometry = JTSFacade.union(geoms, geometryType); |
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} |
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return getGeometry();
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} |
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/**
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* Computes union of all geometries of the clipping layer. The input resources won't
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* be released.
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*
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* @return one geometry
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* @throws NullParameterValueException
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* @throws WrongParameterIDException
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* @throws WrongParameterTypeException
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* @throws com.iver.cit.gvsig.fmap.DriverException
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* @throws ReadDriverException
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* @throws VisitorException
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* @throws ExpansionFileReadException
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*/
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@SuppressWarnings("unchecked") |
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public static org.gvsig.fmap.geom.Geometry joinLayerGeometries(IVectorLayer input) throws WrongParameterTypeException, WrongParameterIDException, NullParameterValueException { |
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ScalableUnionOperation operation = new ScalableUnionOperation();
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FeatureStore store = null;
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if(input instanceof gvVectorLayer) |
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store = ((gvVectorLayer)input).getFeatureStore(); |
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else
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return null; |
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FeatureSet features = null;
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try {
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features = store.getFeatureSet(); |
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DisposableIterator it = features.iterator(); |
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while( it.hasNext() ) {
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Feature feature = (Feature)it.next(); |
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List geomList = feature.getGeometries();
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if(geomList == null) { |
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org.gvsig.fmap.geom.Geometry geom = feature.getDefaultGeometry(); |
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if(geom != null) |
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operation.invoke(geom, geom.getType()); |
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continue;
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} |
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Iterator<org.gvsig.fmap.geom.Geometry> itGeom = geomList.iterator();
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while(itGeom.hasNext()) {
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org.gvsig.fmap.geom.Geometry g = itGeom.next(); |
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operation.invoke(g, g.getType()); |
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} |
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} |
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return operation.getGeometry();
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} catch (DataException e) {
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Sextante.addErrorToLog(e); |
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} |
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return null; |
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} |
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} |
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