svn-gvsig-desktop / trunk / libraries / libFMap / src / com / iver / cit / gvsig / fmap / drivers / featureiterators / IndexedSptQueryFeatureIterator.java @ 11906
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/*
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* Created on 12-abr-2007
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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) 2004 IVER T.I. and 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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* For more information, contact:
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*
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* Generalitat Valenciana
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* Conselleria d'Infraestructures i Transport
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* Av. Blasco Ib??ez, 50
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* 46010 VALENCIA
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* SPAIN
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*
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* +34 963862235
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* gvsig@gva.es
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* www.gvsig.gva.es
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*
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* or
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*
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* IVER T.I. S.A
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* Salamanca 50
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* 46005 Valencia
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* Spain
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*
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* +34 963163400
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* dac@iver.es
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*/
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/* CVS MESSAGES:
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*
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* $Id: IndexedSptQueryFeatureIterator.java 11906 2007-05-30 20:12:41Z azabala $
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* $Log$
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* Revision 1.2 2007-05-30 20:12:20 azabala
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* fastIteration = true optimized.
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*
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* Revision 1.1 2007/05/29 19:08:11 azabala
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* first version in cvs
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*
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* Revision 1.1 2007/04/19 17:27:58 azabala
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* first version in cvs
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*
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*
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*/
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package com.iver.cit.gvsig.fmap.drivers.featureiterators; |
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import java.awt.geom.Rectangle2D; |
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import java.util.List; |
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import org.cresques.cts.IProjection; |
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import org.geotools.resources.geometry.XRectangle2D; |
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import com.hardcode.gdbms.driver.exceptions.ReadDriverException; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.iver.cit.gvsig.exceptions.expansionfile.ExpansionFileReadException; |
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import com.iver.cit.gvsig.fmap.core.DefaultFeature; |
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import com.iver.cit.gvsig.fmap.core.IFeature; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.layers.ReadableVectorial; |
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import com.iver.cit.gvsig.fmap.spatialindex.ISpatialIndex; |
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/**
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* Feature iterator for a spatial query resolved with an spatial index.
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*
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* @author azabala
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*
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*/
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public class IndexedSptQueryFeatureIterator extends SpatialQueryFeatureIterator { |
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/**
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* Spatial index to resolve the spatial query
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*/
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private ISpatialIndex spatialIndex;
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/**
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* List of indexes returned by te spatial index as result
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* of the query, over iterator is going to iterate
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*/
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List resultIdx;
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/**
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* flag that marks if the iterator is doing a fast iteration
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*/
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boolean fastIteration;
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/**
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* Constructor.
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*
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* @param source
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* @param sourceProj
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* @param targetProj
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* @param fieldNames
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* @param spatialQuery
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* @param spatialIndex
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* @param fastIteration
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* @throws ReadDriverException
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*/
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public IndexedSptQueryFeatureIterator(ReadableVectorial source,
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IProjection sourceProj, |
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IProjection targetProj, |
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String[] fieldNames, |
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Rectangle2D spatialQuery,
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ISpatialIndex spatialIndex, |
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boolean fastIteration)throws ReadDriverException { |
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super(source, sourceProj, targetProj, fieldNames, spatialQuery,
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fastIteration); |
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this.spatialIndex = spatialIndex;
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this.fastIteration = fastIteration;
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//the query is in the source projection, not in the targetProj
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//(in super() spatialQuery is reprojected)
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this.resultIdx = this.spatialIndex.query(this.rect); |
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} |
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// public boolean hasNext() {
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// if (fastIteration) {
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// if (resultIdx != null && currentFeature < resultIdx.size())
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// return true;
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// else
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// return false;
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// } else {
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// try {
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// while (true) {
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// if (currentFeature >= resultIdx.size())
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// return false;
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// if (spatialChecker.intersects(rect,
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// ((Integer) resultIdx.get(currentFeature)).intValue()))
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// return true;
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// currentFeature++;
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// }// while
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// } catch (ExpansionFileReadException e) {
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// e.printStackTrace();
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// return false;
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// } catch (ReadDriverException e) {
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// e.printStackTrace();
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// return false;
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// }
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//
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// }
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// }
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public boolean hasNext(){ |
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try {
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while (true) { |
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if (currentFeature >= resultIdx.size())
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return false; |
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// if(fastIteration){
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// IGeometry geom = source.getShape(((Integer) resultIdx.get(currentFeature)).intValue());
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// if(XRectangle2D.intersectInclusive(geom, rect))
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// return true;
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// }else{
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if (spatialChecker.intersects(rect,
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((Integer) resultIdx.get(currentFeature)).intValue()))
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return true; |
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// }//if fastIteration
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currentFeature++; |
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}// while
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} catch (ExpansionFileReadException e) {
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e.printStackTrace(); |
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return false; |
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} catch (ReadDriverException e) {
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e.printStackTrace(); |
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return false; |
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} |
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} |
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public IFeature next() throws ReadDriverException { |
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IGeometry geom; |
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if (fastIteration) {
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try {
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geom = source.getShape(spatialChecker.getIndexOfLast()); |
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reprojectIfNecessary(geom); |
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} catch (ExpansionFileReadException e) {
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throw new ReadDriverException("Error accediendo al driver", e); |
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} |
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} else {
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//we dont check if spatialChecker.returnShapes because when fastIteration = false,
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//spatialChecker is PrecisseSpatialChecker (always return shapes)
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geom = spatialChecker.getLastGeometry(); |
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} |
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Value[] regAtt = getValues(spatialChecker.getIndexOfLast());
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DefaultFeature feat = new DefaultFeature(geom, regAtt, currentFeature
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+ "");
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currentFeature++; |
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return feat;
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} |
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} |