svn-gvsig-desktop / trunk / extensions / extGraph / src / com / iver / cit / gvsig / graph / solvers / ServiceAreaExtractor.java @ 14780
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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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// 18/09/2007 fjp
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// @author: Fco. Jos? Pe?arrubia fpenarru@gmail.com
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package com.iver.cit.gvsig.graph.solvers; |
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import java.io.File; |
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import java.sql.Types; |
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import java.util.ArrayList; |
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import org.gvsig.exceptions.BaseException; |
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import com.hardcode.gdbms.driver.exceptions.InitializeWriterException; |
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import com.hardcode.gdbms.engine.values.Value; |
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import com.hardcode.gdbms.engine.values.ValueFactory; |
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import com.iver.cit.gvsig.exceptions.layers.LoadLayerException; |
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import com.iver.cit.gvsig.exceptions.visitors.ProcessWriterVisitorException; |
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import com.iver.cit.gvsig.fmap.core.DefaultFeature; |
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import com.iver.cit.gvsig.fmap.core.FShape; |
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import com.iver.cit.gvsig.fmap.core.IGeometry; |
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import com.iver.cit.gvsig.fmap.core.v02.FConverter; |
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import com.iver.cit.gvsig.fmap.drivers.FieldDescription; |
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import com.iver.cit.gvsig.fmap.drivers.SHPLayerDefinition; |
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import com.iver.cit.gvsig.fmap.edition.DefaultRowEdited; |
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import com.iver.cit.gvsig.fmap.edition.IRowEdited; |
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import com.iver.cit.gvsig.fmap.edition.writers.shp.ShpWriter; |
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import com.iver.cit.gvsig.fmap.layers.FLyrVect; |
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import com.iver.cit.gvsig.fmap.layers.LayerFactory; |
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import com.iver.cit.gvsig.fmap.layers.ReadableVectorial; |
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import com.iver.cit.gvsig.graph.NetworkUtils; |
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import com.iver.cit.gvsig.graph.core.EdgePair; |
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import com.iver.cit.gvsig.graph.core.GvEdge; |
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import com.iver.cit.gvsig.graph.core.GvNode; |
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import com.iver.cit.gvsig.graph.core.IGraph; |
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import com.iver.cit.gvsig.graph.core.Network; |
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import com.vividsolutions.jts.geom.Geometry; |
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import com.vividsolutions.jts.geom.LineString; |
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/**
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* @author fjp
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*
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* This class can label nodes with distances and costs to a flag
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* Use first doLabelling() with every source flag and call
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* doExtract() to obtain a new layer with fields
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* IdArc, IdEdge, CostOrig, DistOrig, CostEnd, DistEnd, IdFlag
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*
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*/
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public class ServiceAreaExtractor { |
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private static String tempDirectoryPath = System.getProperty("java.io.tmpdir"); |
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static FieldDescription[] fields = new FieldDescription[7]; |
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static {
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FieldDescription fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("IDARC");
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fieldDesc.setFieldType(Types.INTEGER);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(0);
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fields[0] = fieldDesc;
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fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("IDEDGE");
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fieldDesc.setFieldType(Types.INTEGER);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(0);
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fields[1] = fieldDesc;
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fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("COSTORIG");
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fieldDesc.setFieldType(Types.DOUBLE);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(5);
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fields[2] = fieldDesc;
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fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("DISTORIG");
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fieldDesc.setFieldType(Types.DOUBLE);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(5);
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fields[3] = fieldDesc;
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fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("COSTEND");
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fieldDesc.setFieldType(Types.DOUBLE);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(5);
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fields[4] = fieldDesc;
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fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("DISTEND");
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fieldDesc.setFieldType(Types.DOUBLE);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(5);
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fields[5] = fieldDesc;
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fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("IDFLAG");
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fieldDesc.setFieldType(Types.INTEGER);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(5);
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fields[6] = fieldDesc;
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} |
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static FieldDescription[] fieldsPol = new FieldDescription[2]; |
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static {
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FieldDescription fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("COST");
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fieldDesc.setFieldType(Types.DOUBLE);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(5);
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fieldsPol[0] = fieldDesc;
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fieldDesc = new FieldDescription();
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fieldDesc.setFieldName("IDFLAG");
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fieldDesc.setFieldType(Types.INTEGER);
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fieldDesc.setFieldLength(20);
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fieldDesc.setFieldDecimalCount(5);
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fieldsPol[1] = fieldDesc;
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} |
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private Network net;
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private ShpWriter shpWriter;
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private ShpWriter shpWriterPol;
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private File fTemp; |
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private File fTempPol; |
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private SHPLayerDefinition layerDef;
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private SHPLayerDefinition layerDefPol;
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private Geometry serviceArea = null; |
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private ArrayList <Geometry> serviceAreaPolygons; |
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public ServiceAreaExtractor(Network net) throws BaseException { |
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this.net = net;
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int aux = (int)(Math.random() * 1000); |
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String nameLine = "tmpServiceAreaLine" + aux + ".shp"; |
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String namePol = "tmpServiceAreaPol" + aux + ".shp"; |
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fTemp = new File(tempDirectoryPath + "/" + nameLine ); |
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fTempPol = new File(tempDirectoryPath + "/" + namePol ); |
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layerDef = new SHPLayerDefinition();
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layerDef.setFile(fTemp); |
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layerDef.setName(nameLine); |
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layerDef.setFieldsDesc(fields); |
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layerDef.setShapeType(FShape.LINE); |
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layerDefPol = new SHPLayerDefinition();
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layerDefPol.setFile(fTempPol); |
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layerDefPol.setName(namePol); |
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layerDefPol.setFieldsDesc(fieldsPol); |
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layerDefPol.setShapeType(FShape.POLYGON); |
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shpWriter = new ShpWriter();
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shpWriter.setFile(fTemp); |
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shpWriter.initialize(layerDef); |
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shpWriterPol = new ShpWriter();
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shpWriterPol.setFile(fTempPol); |
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shpWriterPol.initialize(layerDefPol); |
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shpWriter.preProcess(); |
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shpWriterPol.preProcess(); |
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} |
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public void doExtract(int idFlag, double[] costs) { |
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// if (maxCost == -1)
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// {
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// throw new RuntimeException("ServiceAreaExtactor: You need to set maxCost.");
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// }
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double maxCost = costs[costs.length-1]; |
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serviceAreaPolygons = new ArrayList<Geometry>(costs.length); |
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for (int i=0; i < costs.length-1; i++) |
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serviceAreaPolygons.add(null);
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FLyrVect lyr = net.getLayer(); |
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IGraph g = net.getGraph(); |
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ReadableVectorial adapter = lyr.getSource(); |
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try {
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adapter.start(); |
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for (int i=0; i < adapter.getShapeCount(); i++) |
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{
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IGeometry geom = adapter.getShape(i); |
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EdgePair edgePair = g.getEdgesByIdArc(i); |
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if (edgePair.getIdEdge() != -1) |
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{
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GvEdge edge = g.getEdgeByID(edgePair.getIdEdge()); |
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GvNode nodeEnd = g.getNodeByID(edge.getIdNodeEnd()); |
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GvNode nodeOrig = g.getNodeByID(edge.getIdNodeOrig()); |
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processEdgeForPolygon(edge, nodeOrig, nodeEnd, geom, costs); |
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if (nodeEnd.getBestCost() > nodeOrig.getBestCost())
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{
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if (nodeEnd.getBestCost() < maxCost) {
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// A ese tramo hemos llegado por completo
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// Recuperamos su distancia y etiquetamos.
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writeTotalEdge(i, geom, edge, nodeOrig, nodeEnd, idFlag); |
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} |
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else
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{
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if (nodeOrig.getBestCost() < maxCost) {
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// A ese tramo hemos llegado parcialmente
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// Recuperamos su distancia y etiquetamos.
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writePartialEdge(i, geom, edge, nodeOrig, nodeEnd, idFlag, maxCost); |
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} |
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} // else
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} // if nodeEnd > nodeOrig
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} |
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if (edgePair.getIdInverseEdge() != -1) |
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{
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GvEdge inversedEdge = g.getEdgeByID(edgePair.getIdInverseEdge()); |
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GvNode nodeEnd = g.getNodeByID(inversedEdge.getIdNodeEnd()); |
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GvNode nodeOrig = g.getNodeByID(inversedEdge.getIdNodeOrig()); |
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processEdgeForPolygon(inversedEdge, nodeOrig, nodeEnd, geom, costs); |
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if (nodeEnd.getBestCost() > nodeOrig.getBestCost())
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{
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if (nodeEnd.getBestCost() < maxCost) {
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// A ese tramo hemos llegado por completo
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// Recuperamos su distancia y etiquetamos.
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writeTotalEdge(i, geom, inversedEdge, nodeOrig, nodeEnd, idFlag); |
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} |
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else
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{
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if (nodeOrig.getBestCost() < maxCost) {
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// A ese tramo hemos llegado parcialmente
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// Recuperamos su distancia y etiquetamos.
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writePartialEdge(i, geom, inversedEdge, nodeOrig, nodeEnd, idFlag, maxCost); |
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} |
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} // else
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} // if nodeEnd > nodeOrig
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} |
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} |
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for (int j=serviceAreaPolygons.size()-1; j>=0; j--) { |
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Geometry jtsGeom = serviceAreaPolygons.get(j); |
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writePolygon(idFlag, costs[j], jtsGeom); |
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} |
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adapter.stop(); |
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} catch (BaseException e) {
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// TODO Auto-generated catch block
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e.printStackTrace(); |
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} |
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} |
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/**
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* Write data and close files.
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* @throws BaseException
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*/
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public void endExtraction() throws BaseException { |
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shpWriter.postProcess(); |
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shpWriterPol.postProcess(); |
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} |
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/**
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* We process each edge and prepare a list of polygons, classified by
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* cost
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* @param edge
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* @param nodeOrig
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* @param nodeEnd
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* @param geom
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* @param costs
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*/
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private void processEdgeForPolygon(GvEdge edge, GvNode nodeOrig, GvNode nodeEnd, IGeometry geom, double[] costs) { |
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if (nodeEnd.getBestCost() > nodeOrig.getBestCost())
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{
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// miramos en qu? pol?gono cae ese edge POR COMPLETO
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// El coste de su punto final es menor que uno de los costes.
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int indexInterval = getCostInterval(nodeEnd.getBestCost(), costs);
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// Un pol?gono por cada zona
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Geometry jtsGeom = geom.toJTSGeometry(); |
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if (indexInterval != -1) |
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{
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for (int i=costs.length-1; i >= indexInterval; i--) { |
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calculateConvexHull(jtsGeom, i); |
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} |
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} |
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double maxCost = costs[costs.length-1]; |
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// Es -1 si caso l?mite externo
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if (indexInterval < costs.length-1) |
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{
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// Caso l?mite externo
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if ((nodeEnd.getBestCost() > maxCost) &&
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(nodeOrig.getBestCost() < maxCost)) |
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{
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double pct = (maxCost - nodeOrig.getBestCost())/ edge.getWeight();
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LineString partial = NetworkUtils.getPartialLineString(jtsGeom, pct, edge.getDirec()); |
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calculateConvexHull(partial, costs.length-1);
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return;
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} |
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// Parcial interno
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maxCost = costs[indexInterval+1];
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if ((nodeOrig.getBestCost() < maxCost) &&
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(nodeEnd.getBestCost() > maxCost)) |
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{
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// A ese tramo hemos llegado parcialmente
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double pct = (maxCost - nodeOrig.getBestCost())/ edge.getWeight();
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try {
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LineString partial = NetworkUtils.getPartialLineString(jtsGeom, pct, edge.getDirec()); |
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calculateConvexHull(partial, indexInterval+1);
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} |
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catch (Exception e) |
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{
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e.printStackTrace(); |
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} |
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} |
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} |
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} |
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} |
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/**
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* @param jtsGeom
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* @param i
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*/
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private void calculateConvexHull(Geometry jtsGeom, int i) { |
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if (serviceAreaPolygons.size() <= i) { // se crea por primera vez |
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Geometry gIni = jtsGeom; |
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serviceAreaPolygons.add(i, gIni); |
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} |
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else
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{
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Geometry antG = serviceAreaPolygons.get(i); |
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if (antG == null) |
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antG = jtsGeom; |
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else
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{
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antG = antG.union(jtsGeom); |
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} |
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antG = antG.convexHull(); |
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serviceAreaPolygons.set(i, antG); |
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} |
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} |
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/**
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* Devuelve el ?ndice del intervalo m?s alto que contiene a ese valor.
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* @param bestCost
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* @param costs
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* @return
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*/
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private int getCostInterval(double bestCost, double[] costs) { |
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int ret = 0; |
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if (bestCost > costs[costs.length-1]) |
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return -1; |
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for (int i=costs.length-1; i>=0; i--) { |
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if (bestCost > costs[i])
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{
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ret = i+1;
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break;
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} |
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} |
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// if (ret > 0)
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// System.out.println(costs[ret-1] + " < " + bestCost + " < " + costs[ret]);
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return ret;
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} |
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private void writePartialEdge(int i, IGeometry geom, GvEdge edge, GvNode nodeOrig, GvNode nodeEnd, int idFlag, double maxCost) throws ProcessWriterVisitorException { |
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Geometry jtsGeom = geom.toJTSGeometry(); |
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double pct = (maxCost - nodeOrig.getBestCost())/ edge.getWeight();
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LineString partial = NetworkUtils.getPartialLineString(jtsGeom, pct, edge.getDirec()); |
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if (serviceArea == null) |
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serviceArea = partial; |
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else
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{
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serviceArea = serviceArea.union(partial); |
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serviceArea = serviceArea.convexHull(); |
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} |
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IGeometry newGeom = FConverter.jts_to_igeometry(partial); |
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Value[] values = new Value[7]; |
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values[0] = ValueFactory.createValue(i);
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values[1] = ValueFactory.createValue(edge.getIdEdge());
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values[2] = ValueFactory.createValue(nodeOrig.getBestCost());
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values[3] = ValueFactory.createValue(nodeOrig.getAccumulatedLength());
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values[4] = ValueFactory.createValue(maxCost);
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values[5] = ValueFactory.createValue(nodeOrig.getAccumulatedLength() + edge.getDistance()*pct);
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values[6] = ValueFactory.createValue(idFlag);
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DefaultFeature feat = new DefaultFeature(newGeom, values);
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IRowEdited row = new DefaultRowEdited(feat, DefaultRowEdited.STATUS_ADDED, i);
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shpWriter.process(row); |
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} |
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private void writeTotalEdge(int i, IGeometry geom, GvEdge edge, GvNode nodeOrig, GvNode nodeEnd, int idFlag) throws ProcessWriterVisitorException { |
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Geometry jtsGeom = geom.toJTSGeometry(); |
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if (serviceArea == null) |
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serviceArea = jtsGeom; |
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else
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{
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serviceArea = serviceArea.union(jtsGeom); |
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serviceArea = serviceArea.convexHull(); |
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} |
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Value[] values = new Value[7]; |
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values[0] = ValueFactory.createValue(i);
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values[1] = ValueFactory.createValue(edge.getIdEdge());
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values[2] = ValueFactory.createValue(nodeOrig.getBestCost());
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values[3] = ValueFactory.createValue(nodeOrig.getAccumulatedLength());
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values[4] = ValueFactory.createValue(nodeEnd.getBestCost());
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values[5] = ValueFactory.createValue(nodeEnd.getAccumulatedLength());
|
| 448 |
values[6] = ValueFactory.createValue(idFlag);
|
| 449 |
|
| 450 |
|
| 451 |
DefaultFeature feat = new DefaultFeature(geom, values);
|
| 452 |
IRowEdited row = new DefaultRowEdited(feat, DefaultRowEdited.STATUS_ADDED, i);
|
| 453 |
shpWriter.process(row); |
| 454 |
} |
| 455 |
|
| 456 |
private void writePolygon(int idFlag, double maxCost, Geometry jtsGeom) throws ProcessWriterVisitorException { |
| 457 |
Value[] values = new Value[2]; |
| 458 |
values[0] = ValueFactory.createValue(maxCost);
|
| 459 |
values[1] = ValueFactory.createValue(idFlag);
|
| 460 |
|
| 461 |
IGeometry geom = FConverter.jts_to_igeometry(jtsGeom); |
| 462 |
DefaultFeature feat = new DefaultFeature(geom, values);
|
| 463 |
IRowEdited row = new DefaultRowEdited(feat, DefaultRowEdited.STATUS_ADDED, idFlag);
|
| 464 |
shpWriterPol.process(row); |
| 465 |
} |
| 466 |
|
| 467 |
public FLyrVect getPolygonLayer() throws LoadLayerException { |
| 468 |
FLyrVect lyr = (FLyrVect) LayerFactory.createLayer(layerDefPol.getName(), "gvSIG shp driver",
|
| 469 |
layerDefPol.getFile(), null);
|
| 470 |
return lyr;
|
| 471 |
} |
| 472 |
|
| 473 |
public FLyrVect getLineLayer() throws LoadLayerException { |
| 474 |
FLyrVect lyr = (FLyrVect) LayerFactory.createLayer(layerDef.getName(), "gvSIG shp driver",
|
| 475 |
layerDef.getFile(), null);
|
| 476 |
return lyr;
|
| 477 |
} |
| 478 |
|
| 479 |
} |