gvsig-geoprocess / org.gvsig.sextante / trunk / org.gvsig.sextante.app / org.gvsig.sextante.app.algorithm / org.gvsig.sextante.app.algorithm.clip / src / main / java / org / gvsig / sextante / app / algorithm / clip / ClipOperation.java @ 28
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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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package org.gvsig.sextante.app.algorithm.clip; |
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import org.gvsig.fmap.dal.exception.DataException; |
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import org.gvsig.fmap.dal.feature.EditableFeature; |
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import org.gvsig.fmap.dal.feature.Feature; |
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import org.gvsig.fmap.dal.feature.FeatureStore; |
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import org.gvsig.fmap.geom.exception.CreateGeometryException; |
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import org.gvsig.fmap.geom.util.Converter; |
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import org.gvsig.sextante.app.algorithm.base.core.DALFeaturePersister; |
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import org.gvsig.sextante.app.algorithm.base.util.GeometryUtil; |
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import com.vividsolutions.jts.geom.Geometry; |
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import es.unex.sextante.core.Sextante; |
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/**
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* This class analyzes all features of a layer, clipping its geometries
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* with the convex hull of another layer.
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* If the geometry of the feature analyzed doesnt intersect with the convex
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* hull geometry, the clipvisitor will ignore it.
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*
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* It intersects, computes intersection and creates a new feature with
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* the same attributes and the new intersection geometry.
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*
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* @author Nacho Brodin (nachobrodin@gmail.com)
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*/
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public class ClipOperation { |
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/**
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* Clipping geometry: the convex hull of the
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* clipping layer
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*/
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private Geometry clippingConvexHull = null; |
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private DALFeaturePersister persister = null; |
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private EditableFeature lastEditFeature = null; |
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public ClipOperation(org.gvsig.fmap.geom.Geometry clip) {
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this.clippingConvexHull = Converter.geometryToJts(clip);
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} |
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/**
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* Sets the output FeatureType
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* @param out
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* @throws DataException
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*/
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public void setFeatureStore(FeatureStore out, String[] attrNames) throws DataException { |
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persister = new DALFeaturePersister(out, attrNames);
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} |
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/**
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* clips feature's geometry with the clipping geometry, preserving
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* feature's original attributes.
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* If feature's geometry doesnt touch clipping geometry, it will be
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* ignored.
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*/
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public EditableFeature invoke(org.gvsig.fmap.geom.Geometry g, Feature feature) {
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if(g == null) |
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return lastEditFeature;
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Geometry jtsGeom = Converter.geometryToJts(g); |
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if(!jtsGeom.getEnvelope().intersects(clippingConvexHull.getEnvelope()))
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return lastEditFeature;
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if(jtsGeom.intersects(clippingConvexHull)) {
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try {
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Geometry newGeom = jtsGeom.intersection(clippingConvexHull); |
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lastEditFeature = persister.addFeature(feature, newGeom); |
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} catch(com.vividsolutions.jts.geom.TopologyException e){
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Sextante.addErrorToLog(e); |
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if(! jtsGeom.isValid()) {
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System.out.println("La geometria de entrada no es valida"); |
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jtsGeom = GeometryUtil.removeDuplicatesFrom(jtsGeom); |
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} |
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if(! clippingConvexHull.isValid()) {
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System.out.println("La geometria de recorte no es valida"); |
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clippingConvexHull = GeometryUtil.removeDuplicatesFrom(clippingConvexHull); |
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} |
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try {
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Geometry newGeom = jtsGeom.intersection(clippingConvexHull); |
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lastEditFeature = persister.addFeature(feature, newGeom); |
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} catch(com.vividsolutions.jts.geom.TopologyException ee){
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Sextante.addErrorToLog(ee); |
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} catch (CreateGeometryException ee) {
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Sextante.addErrorToLog(ee); |
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} catch (DataException ee) {
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Sextante.addErrorToLog(ee); |
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} |
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} catch (CreateGeometryException e) {
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Sextante.addErrorToLog(e); |
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} catch (DataException e) {
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Sextante.addErrorToLog(e); |
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} |
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} |
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return lastEditFeature;
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} |
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/**
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* clips feature's geometry with the clipping geometry, preserving
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* feature's original attributes.
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* If feature's geometry doesnt touch clipping geometry, it will be
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* ignored.
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*/
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public void invoke(org.gvsig.fmap.geom.Geometry g, EditableFeature feature) { |
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if(g == null) |
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return;
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lastEditFeature = feature; |
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Geometry jtsGeom = Converter.geometryToJts(g); |
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if(!jtsGeom.getEnvelope().intersects(clippingConvexHull.getEnvelope()))
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return;
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if(jtsGeom.intersects(clippingConvexHull)) {
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try {
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Geometry newGeom = jtsGeom.intersection(clippingConvexHull); |
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persister.addFeature(feature, newGeom); |
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} catch(com.vividsolutions.jts.geom.TopologyException e){
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Sextante.addErrorToLog(e); |
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if(! jtsGeom.isValid()) {
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System.out.println("La geometria de entrada no es valida"); |
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jtsGeom = GeometryUtil.removeDuplicatesFrom(jtsGeom); |
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} |
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if(! clippingConvexHull.isValid()) {
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System.out.println("La geometria de recorte no es valida"); |
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clippingConvexHull = GeometryUtil.removeDuplicatesFrom(clippingConvexHull); |
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} |
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try {
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Geometry newGeom = jtsGeom.intersection(clippingConvexHull); |
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persister.addFeature(feature, newGeom); |
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} catch(com.vividsolutions.jts.geom.TopologyException ee){
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Sextante.addErrorToLog(ee); |
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} catch (CreateGeometryException ee) {
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Sextante.addErrorToLog(ee); |
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} catch (DataException ee) {
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Sextante.addErrorToLog(ee); |
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} |
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} catch (CreateGeometryException e) {
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Sextante.addErrorToLog(e); |
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} catch (DataException e) {
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Sextante.addErrorToLog(e); |
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} |
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} |
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} |
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/**
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* Ends the edition and closes the FeatureStore
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*/
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public void end() { |
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persister.end(); |
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} |
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public String getProcessDescription() { |
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return "Clipping features agaisnt a clip geometry"; |
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} |
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} |
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