| gvSIG desktop 1

/*

 * Created on 12-abr-2007

 *

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

 *

 * Copyright (C) 2004 IVER T.I. and 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.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: IndexedSptQueryFeatureIterator.java 11285 2007-04-19 17:27:58Z azabala $

* $Log$

* Revision 1.1  2007-04-19 17:27:58  azabala

* first version in cvs

*

*

*/

package com.iver.cit.gvsig.fmap.drivers;

import java.awt.geom.Rectangle2D;

import java.util.List;

import org.cresques.cts.IProjection;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.hardcode.gdbms.engine.values.Value;

import com.iver.cit.gvsig.exceptions.expansionfile.ExpansionFileReadException;

import com.iver.cit.gvsig.fmap.core.DefaultFeature;

import com.iver.cit.gvsig.fmap.core.IFeature;

import com.iver.cit.gvsig.fmap.core.IGeometry;

import com.iver.cit.gvsig.fmap.layers.ReadableVectorial;

import com.iver.cit.gvsig.fmap.spatialindex.ISpatialIndex;

/**

 * Feature iterator for a spatial query resolved with an spatial index.

 * @author azabala

 *

 */

public class IndexedSptQueryFeatureIterator extends SpatialQueryFeatureIterator {

        private ISpatialIndex spatialIndex;

        List resultIdx;

        public IndexedSptQueryFeatureIterator(ReadableVectorial source, 

                                                                                        IProjection sourceProj, 

                                                                                        IProjection targetProj, 

                                                                                        String[] fieldNames, 

                                                                                        Rectangle2D spatialQuery,

                                                                                        ISpatialIndex spatialIndex) throws ReadDriverException {

                super(source, sourceProj, targetProj, fieldNames, spatialQuery);

                this.spatialIndex = spatialIndex;

                this.resultIdx = this.spatialIndex.query(spatialQuery);

        }

        public boolean hasNext(){

                if(resultIdx != null && currentFeature < resultIdx.size())

                        return true;

                else

                        return false;

        }

        public IFeature next() throws ReadDriverException {

                Integer nextFeatureIdx = (Integer) resultIdx.get(currentFeature);

                IGeometry geom;

                try {

                        geom = getGeometry(nextFeatureIdx.intValue());

                } catch (ExpansionFileReadException e) {

                        throw new ReadDriverException("Error accediendo al driver", e);

                } 

                Value[] regAtt = getValues(nextFeatureIdx.intValue());

                DefaultFeature feat = new DefaultFeature(geom, regAtt, currentFeature + "");

                currentFeature++;

                return feat;

        }

}