| gvSIG desktop 1

/* 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

 */

// 18/09/2007 fjp

// @author: Fco. Jos? Pe?arrubia        fpenarru@gmail.com

package org.gvsig.graph.solvers;

import java.awt.geom.Point2D;

import java.awt.geom.Rectangle2D;

import java.io.File;

import java.sql.Types;

import java.util.ArrayList;

import java.util.Collection;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Hashtable;

import java.util.Iterator;

import java.util.Map;

import java.util.Set;

import org.gvsig.exceptions.BaseException;

import org.gvsig.fmap.algorithm.contouring.ContourCalculator;

import org.gvsig.fmap.algorithm.triangulation.OrbisGisTriangulator;

import org.gvsig.fmap.algorithm.triangulation.TIN;

import org.gvsig.fmap.algorithm.triangulation.Triangle;

import org.gvsig.fmap.algorithm.triangulation.Triangulator;

import org.gvsig.fmap.algorithm.triangulation.Vertex;

import org.gvsig.fmap.algorithm.triangulation.WatsonTriangulator;

import org.gvsig.graph.core.EdgePair;

import org.gvsig.graph.core.GvEdge;

import org.gvsig.graph.core.GvFlag;

import org.gvsig.graph.core.GvNode;

import org.gvsig.graph.core.IGraph;

import org.gvsig.graph.core.Network;

import org.gvsig.graph.core.NetworkUtils;

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

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

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

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

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

import com.iver.cit.gvsig.exceptions.layers.LoadLayerException;

import com.iver.cit.gvsig.exceptions.visitors.ProcessWriterVisitorException;

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

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

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

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

import com.iver.cit.gvsig.fmap.core.v02.FConverter;

import com.iver.cit.gvsig.fmap.drivers.FieldDescription;

import com.iver.cit.gvsig.fmap.drivers.SHPLayerDefinition;

import com.iver.cit.gvsig.fmap.edition.DefaultRowEdited;

import com.iver.cit.gvsig.fmap.edition.IRowEdited;

import com.iver.cit.gvsig.fmap.edition.writers.shp.ShpWriter;

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

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

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

import com.vividsolutions.jts.algorithm.CGAlgorithms;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geom.GeometryFactory;

import com.vividsolutions.jts.geom.LineString;

import com.vividsolutions.jts.geom.LinearRing;

import com.vividsolutions.jts.geom.MultiLineString;

import com.vividsolutions.jts.geom.Polygon;

import com.vividsolutions.jts.operation.polygonize.Polygonizer;

/**

 * @author fjp

 * 

 * This class can label nodes with distances and costs to a flag. You will

 * obtain a temp shp layer with fields IdArc, IdEdge, CostOrig, DistOrig,

 * CostEnd, DistEnd, IdFlag

 * 

 * La diferencia con ServiceAreaExtractor es que esta versi?n escucha al

 * algoritmo Dijkstra, y va montando el shp de l?neas conforme va siendo

 * explorada la red. La gran ventaja de hacerlo as? es que no dependes del

 * tama?o de la red. Solo recorres los tramos y nodos que exploras, de forma que

 * si limitas el ?rea de servicio a una distancia m?xima, la red solo se explora

 * hasta esa distancia / coste.

 * 

 */

public class ServiceAreaExtractor2 implements IDijkstraListener {

        private static String tempDirectoryPath = System

                        .getProperty("java.io.tmpdir");

        static FieldDescription[] fields = new FieldDescription[7];

        static {

                FieldDescription fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("IDARC");

                fieldDesc.setFieldType(Types.INTEGER);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(0);

                fields[0] = fieldDesc;

                fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("IDEDGE");

                fieldDesc.setFieldType(Types.INTEGER);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(0);

                fields[1] = fieldDesc;

                fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("COSTORIG");

                fieldDesc.setFieldType(Types.DOUBLE);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fields[2] = fieldDesc;

                fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("DISTORIG");

                fieldDesc.setFieldType(Types.DOUBLE);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fields[3] = fieldDesc;

                fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("COSTEND");

                fieldDesc.setFieldType(Types.DOUBLE);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fields[4] = fieldDesc;

                fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("DISTEND");

                fieldDesc.setFieldType(Types.DOUBLE);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fields[5] = fieldDesc;

                fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("IDFLAG");

                fieldDesc.setFieldType(Types.INTEGER);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fields[6] = fieldDesc;

        }

        static FieldDescription[] fieldsPol = new FieldDescription[2];

        static {

                FieldDescription fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("COST");

                fieldDesc.setFieldType(Types.DOUBLE);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fieldsPol[0] = fieldDesc;

                fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("IDFLAG");

                fieldDesc.setFieldType(Types.INTEGER);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fieldsPol[1] = fieldDesc;

        }

        static GeometryFactory gf = new GeometryFactory();

        private class VisitedEdge {

                private GvEdge edge;

                private double percentcost;

                public VisitedEdge(GvEdge edge) {

                        this.edge = edge;

                        IGraph g = net.getGraph();

                        GvNode nOrig = g.getNodeByID(edge.getIdNodeOrig());

                        double maxCost = costs[costs .length-1];

                        double costCalculated = nOrig.getBestCost() + edge.getWeight();

                        if (costCalculated < maxCost)

                                percentcost = 1.0;

                        else

                        {

                                double percentCostCalculated = (maxCost - nOrig.getBestCost())/ edge.getWeight();

                                percentcost = percentCostCalculated;

                        }

                }

                public GvEdge getEdge() {

                        return edge;

                }

                public double getPercentcost() {

                        return percentcost;

                }

                public void setPercentCost(double d) {

                        this.percentcost = d;

                }

        }

        private Network net;

        private ShpWriter shpWriter;

        private ShpWriter shpWriterPol;

//        private ShpWriter shpWriterTri;

        private File fTempPol;

        private File fTempTri;

        private SHPLayerDefinition layerDefPol;

        private SHPLayerDefinition layerDefTri;

        private HashMap<String, VisitedEdge> visitedEdges = new HashMap();

        private File fTemp;

        private SHPLayerDefinition layerDef;

        private int idFlag;

        private ReadableVectorial adapter;

//        private double maxCost;

        private Geometry serviceArea;

        private ArrayList <Geometry> serviceAreaPolygons;

//        private Hashtable<Integer, EdgePair> smallSegments = new Hashtable();

        private double[] costs = null;        

        private boolean bDoCompactArea = false;

        private HashSet<Coordinate> borderCoords = new HashSet<Coordinate>();

//        private HashSet<Coordinate> nodes;

//        DelaunayFast tri2;

//        DelaunayWatson tri2;

//        PirolTriangulator triangulator = new PirolTriangulator();

//        Triangulator triangulator = new WatsonTriangulator();

        Triangulator triangulator = new OrbisGisTriangulator();

        private TIN tin;

        private Rectangle2D.Double fullExtent = null;

        private double[] distances;

        /**

         * @param net

         * @throws InitializeWriterException

         * @throws ReadDriverException

         * @throws InitializeDriverException

         */

        public ServiceAreaExtractor2(Network net) throws BaseException {

                this.net = net;

                int aux = (int) (Math.random() * 1000);

//                nodes = new HashSet<Coordinate>();

                String nameLine = "tmpServiceAreaLine" + aux + ".shp";

                String namePol = "tmpServiceAreaPol" + aux + ".shp";

                String nameTri = "tmpTri" + aux + ".shp";

                fTemp = new File(tempDirectoryPath + "/" + nameLine );

                fTempPol = new File(tempDirectoryPath + "/" + namePol );

                fTempTri = new File(tempDirectoryPath + "/" + nameTri );

                layerDef = new SHPLayerDefinition();

                layerDef.setFile(fTemp);

                layerDef.setName(nameLine);                

                layerDef.setFieldsDesc(fields);

                layerDef.setShapeType(FShape.LINE);

                layerDefPol = new SHPLayerDefinition();

                layerDefPol.setFile(fTempPol);

                layerDefPol.setName(namePol);                

                layerDefPol.setFieldsDesc(fieldsPol);

                layerDefPol.setShapeType(FShape.POLYGON);

                layerDefTri = new SHPLayerDefinition();

                layerDefTri.setFile(fTempTri);

                layerDefTri.setName(nameTri);                

                layerDefTri.setFieldsDesc(fieldsPol);

                layerDefTri.setShapeType(FShape.POLYGON);

                shpWriter = new ShpWriter();

                shpWriter.setFile(fTemp);

                shpWriter.initialize(layerDef);

                shpWriterPol = new ShpWriter();

                shpWriterPol.setFile(fTempPol);

                shpWriterPol.initialize(layerDefPol);

//                shpWriterTri = new ShpWriter();

//                shpWriterTri.setFile(fTempTri);

//                shpWriterTri.initialize(layerDefTri);

//                shpWriterTri.preProcess();

                shpWriter.preProcess();

                shpWriterPol.preProcess();

                FLyrVect lyr = net.getLayer();

                adapter = lyr.getSource();

                adapter.start();

                serviceAreaPolygons = new ArrayList<Geometry>();

        }

        /**

         * Devuelve el ?ndice del intervalo m?s alto que contiene a ese valor.

         * @param bestCost

         * @param costs

         * @return

         */

        private int getCostInterval(double bestCost, double[] costs) {

                int ret = 0;

                if (bestCost > costs[costs.length-1])

                        return -1;

                for (int i=costs.length-1; i>=0; i--) {

                        if (bestCost > costs[i])

                        {

                                ret = i+1;

                                break;

                        }

                }

                return ret;

        }

        /**

         * We process each edge and prepare a list of polygons, classified by

         * cost

         * @param edge

         * @param nodeOrig

         * @param nodeEnd

         * @param geom

         * @param costs

         * @throws ProcessWriterVisitorException 

         */

        private void processEdgeForPolygon(GvEdge edge, GvNode nodeOrig, GvNode nodeEnd, IGeometry geom, double[] costs) throws ProcessWriterVisitorException {

                if (nodeEnd.getBestCost() > nodeOrig.getBestCost())

                {                

                        // miramos en qu? pol?gono cae ese edge POR COMPLETO 

                        // El coste de su punto final es menor que uno de los costes.

                        double costAux = nodeOrig.getBestCost() + edge.getWeight();

                        int indexInterval = getCostInterval(costAux, costs);

                        // Un pol?gono por cada zona

                        Geometry jtsGeom = geom.toJTSGeometry();

                        if (indexInterval != -1)

                        {

                                for (int i=costs.length-1; i >= indexInterval; i--) {

                                        calculateConvexHull(jtsGeom, i);

                                }

                                writeTotalEdge(edge.getIdArc(), geom, edge, nodeOrig, nodeEnd, idFlag);

                        }

                        double maxCost = costs[costs.length-1];

                        // Es -1 si caso l?mite externo

                        if (indexInterval < costs.length-1)

                        {

                                // Caso l?mite externo

                                if ((costAux > maxCost) &&                                                

                                                (nodeOrig.getBestCost() < maxCost))

                                {

                                        double pct = (maxCost - nodeOrig.getBestCost())/ edge.getWeight();

                                        if (edge.getDirec() == 0) // Sentido inverso

                                                pct = 1-pct;

                                        LineString partial = null;

                                        if (nodeOrig.getBestCost() == 0) {

                                                // Caso particular: empezamos en un tramo y terminamos en ese mismo tramo

                                                if (edge.getDirec() == 0) // ponemos el pct como estaba. En el nuevo getPartialString ya lo tiene en cuenta

                                                        pct = 1-pct;

                                                GvFlag f = net.getFlags()[idFlag];

                                                double pct1 = f.getPct();

                                                double Ltotal = jtsGeom.getLength();

                                                double Lb = pct * edge.getDistance();

                                                double pct2 = Lb / Ltotal; 

                                                partial = NetworkUtils.getPartialLineString(jtsGeom, pct1, pct2, edge.getDirec());

                                                writePartialEdge2(edge.getIdArc(), partial, edge, nodeOrig, nodeEnd, idFlag, maxCost);

                                        }

                                        else {

                                                partial = NetworkUtils.getPartialLineString(jtsGeom, pct, edge.getDirec());

                                                writePartialEdge(edge.getIdArc(), partial, edge, nodeOrig, nodeEnd, idFlag, maxCost);        

                                        }                                        

                                        calculateConvexHull(partial, costs.length-1);

                                        return;

                                }

                                // Parcial interno

                                maxCost = costs[indexInterval+1];

                                if ((nodeOrig.getBestCost() < maxCost) &&

                                                (costAux > maxCost)) 

                                {

                                        // A ese tramo hemos llegado parcialmente

                                        double pct = (maxCost - nodeOrig.getBestCost())/ edge.getWeight();

                                        try {

                                                LineString partial = NetworkUtils.getPartialLineString(jtsGeom, pct, edge.getDirec());

                                                writePartialEdge(edge.getIdArc(), partial, edge, nodeOrig, nodeEnd, idFlag, maxCost);        

                                                calculateConvexHull(partial, indexInterval+1);                                                        

                                        }

                                        catch (Exception e)

                                        {

                                                e.printStackTrace();

                                        }

                                }

                        }

                } 

        }

        /**

         * @param jtsGeom

         * @param i

         */

        private void calculateConvexHull(Geometry jtsGeom, int i) {

                if (serviceAreaPolygons.size() <= i) { // se crea por primera vez

                        Geometry gIni = jtsGeom.convexHull(); 

                        serviceAreaPolygons.add(i, gIni);

                }

                else

                {

                        Geometry antG = serviceAreaPolygons.get(i);

                        if (antG == null)

                                antG = jtsGeom.convexHull();

                        else

                        {

                                antG = antG.union(jtsGeom.convexHull());                                

                        }

                        antG = antG.convexHull();

                        serviceAreaPolygons.set(i, antG);

                }

        }

        private void writePartialEdge(int i, LineString partial, GvEdge edge, GvNode nodeOrig, GvNode nodeEnd, int idFlag, double maxCost) throws ProcessWriterVisitorException {

//                Geometry jtsGeom = geom.toJTSGeometry();

                double pct = (maxCost - nodeOrig.getBestCost())/ edge.getWeight();

                if (edge.getDirec() == 0) // Sentido inverso

                        pct = 1-pct;

//                LineString partial = NetworkUtils.getPartialLineString(jtsGeom, pct, edge.getDirec());

//                if (serviceArea == null)

//                        serviceArea = partial;

//                else

//                {

//                        serviceArea = serviceArea.union(partial);

//                        serviceArea = serviceArea.convexHull();

//                }

                IGeometry newGeom = FConverter.jts_to_igeometry(partial);

                Value[] values = new Value[7];

                values[0] = ValueFactory.createValue(i);

                values[1] = ValueFactory.createValue(edge.getIdEdge());

                values[2] = ValueFactory.createValue(nodeOrig.getBestCost());

                values[3] = ValueFactory.createValue(nodeOrig.getAccumulatedLength());

                values[4] = ValueFactory.createValue(maxCost);

                values[5] = ValueFactory.createValue(nodeOrig.getAccumulatedLength() + edge.getDistance()*pct);

                values[6] = ValueFactory.createValue(idFlag);

                DefaultFeature feat = new DefaultFeature(newGeom, values);

                IRowEdited row = new DefaultRowEdited(feat, DefaultRowEdited.STATUS_ADDED, i);

                shpWriter.process(row);

//                // TODO: TROZO DEL RESTO

//                int direc = 0;

//                pct = pct+0.02;

//                if (edge.getDirec() == 0)

//                {

//                        direc = 1;

//                        pct = pct - 0.04;

//                }

//                LineString partial2 = NetworkUtils.getPartialLineString(jtsGeom, pct, direc);                

//                IGeometry newGeom2 = FConverter.jts_to_igeometry(partial2);

//                values[6] = ValueFactory.createValue(-2);

//                DefaultFeature feat2 = new DefaultFeature(newGeom2, values);

//                IRowEdited row2 = new DefaultRowEdited(feat2, DefaultRowEdited.STATUS_ADDED, i);

//                shpWriter.process(row2);

                // before

                addUniqueNode(nodeOrig.getX(), nodeOrig.getY(), nodeOrig.getBestCost());

                // ON

                Coordinate cAux = null;

                if (edge.getDirec() == 0) // Sentido inverso

                        cAux = partial.getCoordinateN(0);

                else

                        cAux = partial.getCoordinateN(partial.getNumPoints()-1);

                addUniqueNode(cAux.x, cAux.y, maxCost);

                // after

                addUniqueNode(nodeEnd.getX(), nodeEnd.getY(), nodeEnd.getBestCost());

//                if (bDoCompactArea) {

//                        Coordinate cLimit = null;

//                        if (edge.getDirec() == 0) // Sentido inverso

//                                cLimit = partial.getCoordinateN(0);

//                        else

//                                cLimit = partial.getCoordinateN(partial.getNumPoints()-1);

//                        processCompact(cLimit.x, cLimit.y);

//                }

        }

        private void writePartialEdge2(int i, LineString jtsGeom, GvEdge edge, GvNode nodeOrig, GvNode nodeEnd, int idFlag, double maxCost) throws ProcessWriterVisitorException {

                double pct = (maxCost - nodeOrig.getBestCost())/ edge.getWeight();

                if (edge.getDirec() == 0) // Sentido inverso

                        pct = 1-pct;

                IGeometry newGeom = FConverter.jts_to_igeometry(jtsGeom);

                Value[] values = new Value[7];

                values[0] = ValueFactory.createValue(i);

                values[1] = ValueFactory.createValue(edge.getIdEdge());

                values[2] = ValueFactory.createValue(nodeOrig.getBestCost());

                values[3] = ValueFactory.createValue(nodeOrig.getAccumulatedLength());

                values[4] = ValueFactory.createValue(maxCost);

                values[5] = ValueFactory.createValue(nodeOrig.getAccumulatedLength() + edge.getDistance()*pct);

                values[6] = ValueFactory.createValue(idFlag);

                DefaultFeature feat = new DefaultFeature(newGeom, values);

                IRowEdited row = new DefaultRowEdited(feat, DefaultRowEdited.STATUS_ADDED, i);

                shpWriter.process(row);

                // before

                addUniqueNode(nodeOrig.getX(), nodeOrig.getY(), nodeOrig.getBestCost());

                // ON

                Coordinate cAux = null;

                if (edge.getDirec() == 0) // Sentido inverso

                        cAux = jtsGeom.getCoordinateN(0);

                else

                        cAux = jtsGeom.getCoordinateN(jtsGeom.getNumPoints()-1);

                addUniqueNode(cAux.x, cAux.y, maxCost);

                // after

                addUniqueNode(nodeEnd.getX(), nodeEnd.getY(), nodeEnd.getBestCost());

        }

        private void addUniqueNode(double x, double y, double z) {

                Coordinate c = new Coordinate(x,y,z);

                if (!borderCoords.contains(c)) {

                        borderCoords.add(c);

                        if (borderCoords.size() == 2) {

                                Iterator<Coordinate> it = borderCoords.iterator();

                                int i=0;

                                Coordinate cAuxF1 = null;

                                Coordinate cAuxF2 = null;

                                while (it.hasNext()) {

                                        if (i==0)

                                                cAuxF1 = it.next();

                                        else

                                                cAuxF2 = it.next();

                                        i++;

                                }

                                fullExtent = new Rectangle2D.Double();

                                fullExtent.setFrameFromDiagonal(cAuxF1.x,cAuxF1.y, cAuxF2.x, cAuxF2.y);

                        }

                        else

                                if (fullExtent != null)

                                        fullExtent.add(new Point2D.Double(x,y));

                }

        }

        /**

         * FIXME: CHANGE THE NAME OF THIS METHOD. Now, it writes al nodes with cost < maxCost

         * @return

         * @throws BaseException

         */

        public FLyrVect getBorderPoints() throws BaseException {

                File fTempPoints = new File(tempDirectoryPath + "/borderPoints.shp");

                FieldDescription[] fieldsPoints = new FieldDescription[1];

                FieldDescription fieldDesc = new FieldDescription();

                fieldDesc.setFieldName("COST");

                fieldDesc.setFieldType(Types.DOUBLE);

                fieldDesc.setFieldLength(20);

                fieldDesc.setFieldDecimalCount(5);

                fieldsPoints[0] = fieldDesc;

                SHPLayerDefinition layerDef = new SHPLayerDefinition();

                layerDef.setFile(fTempPoints);

                layerDef.setName("BorderPoints");                

                layerDef.setFieldsDesc(fieldsPoints);

                layerDef.setShapeType(FShape.POINT);

                ShpWriter shpWriter = new ShpWriter();

                shpWriter.setFile(fTempPoints);

                shpWriter.initialize(layerDef);

                int i=0;

                shpWriter.preProcess();

                for (Iterator it = borderCoords.iterator(); it.hasNext();) {

                        Coordinate c = (Coordinate) it.next();

                        Value[] values = new Value[1];                        

                        values[0] = ValueFactory.createValue(c.z);

                        IGeometry geom = ShapeFactory.createPoint2D(c.x, c.y);

                        DefaultFeature feat = new DefaultFeature(geom, values);

                        IRowEdited row = new DefaultRowEdited(feat,

                                        DefaultRowEdited.STATUS_ADDED, i++);

                        shpWriter.process(row);

                }

                shpWriter.postProcess();

                FLyrVect lyr = (FLyrVect) LayerFactory.createLayer(layerDef.getName(), "gvSIG shp driver", 

                                layerDef.getFile(), null);

                return lyr;

        }

        public void reset() {

                borderCoords.clear();

                visitedEdges.clear();

                serviceAreaPolygons.clear();

                triangulator = new OrbisGisTriangulator();

                tin = new TIN();

                fullExtent = null;

        }

//        private void processCompact(LineString partial) {

//                Coordinate cIni = partial.getCoordinateN(0);

//                Coordinate cEnd = partial.getCoordinateN(partial.getNumPoints()-1);

////                System.out.println("PARTIAL c1=" + cIni + " cEnd=" + cEnd);

//                processCompact(cIni.x, cIni.y);

//                processCompact(cEnd.x, cEnd.y);

//        }

        private void writeTotalEdge(int i, IGeometry geom, GvEdge edge,

                        GvNode nodeOrig, GvNode nodeEnd, int idFlag)

                        throws ProcessWriterVisitorException {

                Geometry jtsGeom = geom.toJTSGeometry();

                if (serviceArea == null)

                        serviceArea = jtsGeom;

                else

                {

                        serviceArea = serviceArea.union(jtsGeom);

                        serviceArea = serviceArea.convexHull();

                }

                Value[] values = new Value[7];

                values[0] = ValueFactory.createValue(i);

                values[1] = ValueFactory.createValue(edge.getIdEdge());

                values[2] = ValueFactory.createValue(nodeOrig.getBestCost());

                values[3] = ValueFactory.createValue(nodeOrig.getAccumulatedLength());

                values[4] = ValueFactory.createValue(nodeOrig.getBestCost() + edge.getWeight());

                values[5] = ValueFactory.createValue(nodeOrig.getAccumulatedLength() + edge.getDistance());

                values[6] = ValueFactory.createValue(idFlag);

                if (bDoCompactArea) {

                        // This code is necessary ONLY if you want to triangulate also with interior points

                        // (To draw a 3D view, for example.

                        // TODO: Use borderPoints in triangulation instead of "nodes"

                        // Origin

                        addUniqueNode(nodeOrig.getX(), nodeOrig.getY(), nodeOrig.getBestCost());

                        // end

                        addUniqueNode(nodeEnd.getX(), nodeEnd.getY(), nodeEnd.getBestCost());

//                        System.out.println(" c1=" + cIni + " cEnd=" + cEnd);

//                        processCompact(nodeOrig.getX(), nodeOrig.getY());

//                        processCompact(nodeEnd.getX(), nodeEnd.getY());

                }

                DefaultFeature feat = new DefaultFeature(geom, values);

                IRowEdited row = new DefaultRowEdited(feat,

                                DefaultRowEdited.STATUS_ADDED, i);

                shpWriter.process(row);

        }

//        private void processCompact(double x, double y) {

////                FPoint2D p = new FPoint2D(x,y);

//                Coordinate c = new Coordinate(x,y);

////                System.out.println("PARTIAL c1=" + cIni + " cEnd=" + cEnd);

//                if (!nodes.contains(c))

//                        nodes.add(c);

//                else

//                {

//                        System.out.print("Nodo ya contenido");

//                }

//                

//        }

        public boolean adjacentEdgeVisited(GvNode fromNode, GvEdge edge) {

                insertVisitedEdge(edge);

                return false;

        }

        /**

         * Si el coste m?nimo del edge > costemax, salimos del m?todo.

         * Miramos si edge est? ya en la lista.

         * Si no est?, lo a?adimos.

         * Si est?, hay que mirar el porcentaje recorrido sobre ese tramo.

         * Casos posibles:

         * EdgeA al 100 % => No se a?ade este.

         * EdgeA.percentCost < 1.0. 

         *                 Comprobamos el percent de el nuevo. Si entre los dos suman > 1.0

         *                 marcamos el antiguo al 1.0 para que se escriba el tramo completo.

         * 

         *                 Si no suman 1.0, hay que a?adir este nuevo Edge, con el porcentaje

         *                 correspondiente.

         * @param edge

         */

        private void insertVisitedEdge(GvEdge edge) {

                IGraph g = net.getGraph();

                GvNode n1 = g.getNodeByID(edge.getIdNodeOrig());

                GvNode n2 = g.getNodeByID(edge.getIdNodeEnd());

                double maxCost = costs[costs .length-1]*1.2;

                if (Math.min(n1.getBestCost(), n2.getBestCost()) > maxCost)

                        return; // edge outside service area.

                String key = "" + edge.getIdArc();

                if (!visitedEdges.containsKey(key))        

                {

                        // En el constructor calculamos el porcentaje recorrido y lo guardamos

                        visitedEdges.put(key, new VisitedEdge(edge));

//                        System.out.println("idEdge adjacent= " + edge.getIdEdge());

                }

                else

                {

                        // Recuperamos el visiteEdge que hab?amos metido y miramos sus porcentajes

                        // recorridos. Si entre los dos porcentajes NO suman m?s de uno, quiere decir

                        // que ah? se queda un tramo central al que no llegamos ni desde un lado ni

                        // desde el otro. Por eso guardamos cada trocito al que hemos llegado por separado, 

                        // uno con la clave idArc y otro con la clave IdArc_.

                        VisitedEdge edgeAnt = visitedEdges.get(key);

//                        GvEdge savedEdge = edgeAnt.getEdge();

                        if (edgeAnt.getPercentcost() == 1.0)

                                return; // Ya est? completo, no a?adimos nada.

                        double percentCostCalculated = (maxCost - n1.getBestCost())/ edge.getWeight();

                        if ((percentCostCalculated + edgeAnt.getPercentcost()) >= 1.0)

                                edgeAnt.setPercentCost(1.0);

                        else

                        {

                                visitedEdges.put(key + "_", new VisitedEdge(edge));

                        }

                }

        }

        public boolean minimumCostNodeSelected(GvNode node) {

//                IGraph g = net.getGraph();

//                int idEdge = node.getFromLink();

//                if (idEdge == -1) 

//                        return false;

//                GvEdge edge = g.getEdgeByID(idEdge);

//                insertVisitedEdge(edge);

                return false; // true if we want to stop Dijkstra

        }

        public void setIdFlag(int idFlag) {

                this.idFlag = idFlag;

        }

        /**

         * Write edges and polygons associated with active flag and costs

         * @param costs

         * @throws BaseException

         */

        public void writeServiceArea() throws BaseException {

                Set<Map.Entry<String, VisitedEdge>> keySet = visitedEdges.entrySet();

                GvEdge edge;

                IGraph g = net.getGraph();

//                Integer idEdge;

                double maxCost = costs[costs .length-1];

                serviceAreaPolygons = new ArrayList<Geometry>(costs.length);

                for (int i=0; i < costs.length-1; i++)

                        serviceAreaPolygons.add(null);

                for (Map.Entry<String, VisitedEdge> entry : keySet) {

//                        idEdge = entry.getKey();

                        VisitedEdge visitedEdge = entry.getValue(); 

                        edge = visitedEdge.getEdge();

                        GvNode nodeEnd = g.getNodeByID(edge.getIdNodeEnd());

                        GvNode nodeOrig = g.getNodeByID(edge.getIdNodeOrig());

                        IGeometry geom;

                        try {

                                geom = adapter.getShape(edge.getIdArc());

                                FLyrVect lyr = net.getLayer();

                            if (lyr.getCoordTrans() != null) {

                                    if (!lyr.getProjection().getAbrev().equals(lyr.getMapContext().getViewPort().getProjection().getAbrev())){

                                            geom.reProject(lyr.getCoordTrans());

                                    }

                            }                        

                                processEdgeForPolygon(edge, nodeOrig, nodeEnd, geom, costs);

//                                double costAux = nodeOrig.getBestCost() + edge.getWeight();

////                                if (nodeEnd.getBestCost() > nodeOrig.getBestCost())

//                                {

//                                        if (visitedEdge.getPercentcost() == 1.0) {

//                                                // A ese tramo hemos llegado por completo

//                                                // Recuperamos su distancia y etiquetamos.

//                                                writeTotalEdge(edge.getIdArc(), geom, edge, nodeOrig, nodeEnd, idFlag);        

//                                        }

//                                        else

//                                        {

//                                                // El CASO EN EL QUE HAS LLEGADO POR LOS

//                                                // 2 LADOS PERO HAY UN TRAMO INALCANZABLE ENMEDIO SE

//                                                // SOLUCIONA EN writePartialEdge

//                                                if (nodeOrig.getBestCost() < maxCost) { // FIXME: Creo que este if no tiene sentido.

//                                                        // A ese tramo hemos llegado parcialmente 

//                                                        // Recuperamos su distancia y etiquetamos.

//                                                        writePartialEdge(edge.getIdArc(), geom, edge, nodeOrig, nodeEnd, idFlag, maxCost);        

//                                                        

//                                                }

//                                        } // else

//                                } // if nodeEnd > nodeOrig

                        } catch (BaseException e) {

                                e.printStackTrace();

                                throw new RuntimeException(e);

                        }

                } // for

                if (bDoCompactArea) {

                        addExteriorPoints();

                        calculateTriangulation();

                        getBorderPoints();

                }

                for (int j=serviceAreaPolygons.size()-1; j>=0; j--) {

                        Geometry jtsGeom = null;

                        if (bDoCompactArea) {

                                ContourCalculator contourCalculator = new ContourCalculator(tin);

                                Polygonizer pol = new Polygonizer();

                                pol.add(contourCalculator.getContour(costs[j]+0.1));

                                Collection<Polygon> polygons = pol.getPolygons();

                                Iterator<Polygon> it = polygons.iterator();

                                double maxArea = 0;

                                double area;

                                while (it.hasNext()) {

                                        Polygon auxPol = it.next();

                                        area = auxPol.getArea(); 

                                        if ( area > maxArea) {                                                

                                                jtsGeom = auxPol;

                                                maxArea = area;

                                        } // if

                                } // while

                                // TODO: Optimizar este pol?gono. Quitar bucles y comprobar smallSegments,

                                // insideLines y outsideLines

                        }

                        else

                        {

                                jtsGeom = serviceAreaPolygons.get(j);

                        }

                        if (jtsGeom != null)

                                writePolygon(idFlag, costs[j], jtsGeom);

                }

        }

        /**

         * We add points from fullExtent to allow better contour calculations 

         */

        private void addExteriorPoints() {

                int numSteps = 30; // por ejemplo, 30 puntos por cada lado del rect?ngulo

                double stepX = fullExtent.width / numSteps;

                double stepY = fullExtent.height / numSteps;

                for (int i=0; i < numSteps; i++) {

                        double x = fullExtent.getMinX() + stepX*i;

                        double y = fullExtent.getMinY() + stepY*i;

                        Coordinate cUp = new Coordinate(x, fullExtent.getMaxY() + 10.0, Double.MAX_VALUE);

                        Coordinate cDown = new Coordinate(x, fullExtent.getMinY() - 10.0, Double.MAX_VALUE);

                        Coordinate cLeft = new Coordinate(fullExtent.getMinX() - 10.0, y, Double.MAX_VALUE);

                        Coordinate cRight = new Coordinate(fullExtent.getMaxX() + 10.0, y, Double.MAX_VALUE);

                        borderCoords.add(cUp);

                        borderCoords.add(cDown);

                        borderCoords.add(cLeft);

                        borderCoords.add(cRight);

                }

        }

        /**

         * @param d 

         * 

         */

        private void calculateTriangulation() {

                int numPoints = borderCoords.size();

            Iterator it = borderCoords.iterator();

            for (int i=0; i<numPoints; i++) {

                    Coordinate node = (Coordinate) it.next();

                    Vertex v = new Vertex(node.x, node.y, node.z);

                    triangulator.addVertex(v);

            }

            tin = triangulator.calculateTriangulation();

                System.out.println("Fin de trayecto. Num. tri?ngulos=" + tin.getTriangles().size());

                // ========= ONLY TO DEBUG

//                for (int i=0; i< tin.getTriangles().size(); i++) {

//                      try {

//                                writeTri(tin.getTriangles().get(i));

//                        } catch (ProcessWriterVisitorException e) {

//                                // TODO Auto-generated catch block

//                                e.printStackTrace();

//                        }

//            }

                // ==========

        }

        private void writeTri(Triangle t) throws ProcessWriterVisitorException {

                Value[] values = new Value[2];

                values[0] = ValueFactory.createValue(2.0);

                values[1] = ValueFactory.createValue(1);

                Coordinate c1 = new Coordinate(t.getV1().getX(), t.getV1().getY());

                Coordinate c2 = new Coordinate(t.getV2().getX(), t.getV2().getY());

                Coordinate c3 = new Coordinate(t.getV3().getX(), t.getV3().getY());

                Coordinate[] c = new Coordinate[4];

                c[0] = c1;

                c[1] = c3;

                c[2] = c2;

                c[3] = c1;

                LinearRing linRing = null;

                if (CGAlgorithms.isCCW(c))

                {

                        Coordinate[] ccw = new Coordinate[4];

                        ccw[0] = c1;

                        ccw[1] = c2;

                        ccw[2] = c3;

                        ccw[3] = c1;

                        linRing = gf.createLinearRing(ccw);

                }

                else

                {

                        linRing = gf.createLinearRing(c);

//                        return;

                }

                Polygon pol = gf.createPolygon(linRing, null);

                IGeometry geom = FConverter.jts_to_igeometry(pol);

                DefaultFeature feat = new DefaultFeature(geom, values);

                IRowEdited row = new DefaultRowEdited(feat, DefaultRowEdited.STATUS_ADDED, idFlag);

//                shpWriterPol.process(row);

//                shpWriterTri.process(row);

        }

        private void writePolygon(int idFlag, double maxCost, Geometry jtsGeom) throws ProcessWriterVisitorException {

                Value[] values = new Value[2];

                values[0] = ValueFactory.createValue(maxCost);

                values[1] = ValueFactory.createValue(idFlag);

                IGeometry geom = FConverter.jts_to_igeometry(jtsGeom);

                DefaultFeature feat = new DefaultFeature(geom, values);

                IRowEdited row = new DefaultRowEdited(feat, DefaultRowEdited.STATUS_ADDED, idFlag);

                shpWriterPol.process(row);

        }

        /**

         * Close writers.

         * @throws BaseException

         */

        public void closeFiles() throws BaseException {

//                for (int j=serviceAreaPolygons.size()-1; j>=0; j--) {

//                        Geometry jtsGeom = serviceAreaPolygons.get(j);

//                        writePolygon(idFlag, costs[j], jtsGeom);

//                }

                shpWriter.postProcess();

                shpWriterPol.postProcess();

//                shpWriterTri.postProcess();

                adapter.stop();

        }

        public double[] getCosts() {

                return costs;

        }

        public void setCosts(double[] costs) {

                this.costs = costs;

        }

        public FLyrVect getPolygonLayer() throws LoadLayerException {

                FLyrVect lyr = (FLyrVect) LayerFactory.createLayer(layerDefPol.getName(), "gvSIG shp driver", 

                                layerDefPol.getFile(), null);

                return lyr;

        }

        public FLyrVect getLineLayer() throws LoadLayerException {

                FLyrVect lyr = (FLyrVect) LayerFactory.createLayer(layerDef.getName(), "gvSIG shp driver", 

                                layerDef.getFile(), null);

                return lyr;

        }

        public boolean isDoCompactArea() {

                return bDoCompactArea;

        }

        public void setDoCompactArea(boolean doCompactArea) {

                bDoCompactArea = doCompactArea;

        }

        public void setDistances(double[] distances) {

                this.distances = distances;

        }

}