Application: gvSIG desktop » gvSIG geoprocess

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2012 gvSIG Association.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

/*

 * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2010 Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 */

package org.gvsig.geoprocess.algorithm.fusespatially;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.dal.feature.EditableFeature;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.dal.feature.FeatureSet;

import org.gvsig.fmap.dal.feature.FeatureStore;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.geoprocess.algorithm.base.core.GeometryOperation;

import org.gvsig.geoprocess.algorithm.base.util.GeometryUtil;

import com.vividsolutions.jts.geom.Geometry;

/**

 * Fuse spatially operation

 * @author <a href="mailto:nachobrodin@gmail.com">Nacho Brodin</a>

 */

public class FuseSpatiallyOperation extends GeometryOperation {

        private FeatureStore                     inFeatStore      = null;

        protected GeometryManager                geomManager      = GeometryLocator.getGeometryManager();

        private FeatureSet                       featureSet       = null;

        private int                              id               = 0;

        private long                             nFeatures        = 0;

        private boolean[]                        featProcessed    = null;

        public FuseSpatiallyOperation(FeatureStore inFeatStore, boolean selectedGeom) throws DataException {

                this.inFeatStore = inFeatStore;

                if(selectedGeom) {

                        featureSet = (FeatureSet)inFeatStore.getSelection();

                } else

                        featureSet = inFeatStore.getFeatureSet();

                nFeatures = featureSet.getSize();

                featProcessed = new boolean[(int)nFeatures];

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.geoprocess.algorithm.base.core.GeometryOperation#invoke(org.gvsig.fmap.geom.Geometry, org.gvsig.fmap.dal.feature.Feature)

         */

        public EditableFeature invoke(org.gvsig.fmap.geom.Geometry g, Feature feature) {

                if(g == null)

                        return lastEditFeature;

                try {

                        Geometry inputJTSGeom = GeometryUtil.geomToJTS(g);

                        Geometry union = null; 

                        Iterator it = featureSet.fastIterator();

                        int index = 0;

                        while(it.hasNext()) {

                                Feature f = (Feature)it.next();

                                if(featProcessed[index])

                                        continue;

                                org.gvsig.fmap.geom.Geometry geom = feature.getDefaultGeometry();

                                Geometry jtsGeom = GeometryUtil.geomToJTS(geom); //Multigeometry support

                                if(inputJTSGeom.intersects(jtsGeom)) {

                                        inputJTSGeom = inputJTSGeom.union(jtsGeom);

                                        featProcessed[index] = true;

                                }

                                index ++;

                                continue;

                        }

                        lastEditFeature = persister.addFeature(inputJTSGeom, "FID", id);

                } catch (DataException e) {

                        return null;

                } catch (CreateGeometryException e) {

                        return null;

                }

                id++;

                return lastEditFeature;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.geoprocess.algorithm.base.core.GeometryOperation#invoke(org.gvsig.fmap.geom.Geometry, org.gvsig.fmap.dal.feature.EditableFeature)

         */

        public void invoke(org.gvsig.fmap.geom.Geometry g, EditableFeature feature) {

                if(g == null)

                        return;

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.geoprocess.algorithm.base.core.IOperation#getResult()

         */

        public Object getResult() {

                return lastEditFeature;

        }

}