Application: gvSIG desktop

/*

 * Created on 10-abr-2006

 *

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

 *

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

 *

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

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

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

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

 *

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

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

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

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

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

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

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

 *

 * $Id: 

 * $Log: 

 */

package org.gvsig.topology.errorfixes;

import java.awt.geom.Rectangle2D;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.Iterator;

import java.util.List;

import org.gvsig.exceptions.BaseException;

import org.gvsig.fmap.core.FGeometryUtil;

import org.gvsig.fmap.core.NewFConverter;

import org.gvsig.jts.JtsUtil;

import org.gvsig.topology.Messages;

import org.gvsig.topology.TopologyError;

import sun.reflect.generics.reflectiveObjects.NotImplementedException;

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

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

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

import com.iver.cit.gvsig.fmap.core.FPoint2D;

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

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

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

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

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

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

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

import com.vividsolutions.jts.algorithms.SnapCGAlgorithms;

import com.vividsolutions.jts.geom.Coordinate;

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geom.LineString;

import com.vividsolutions.jts.operation.linemerge.LineMerger;

import com.vividsolutions.jts.precision.EnhancedPrecisionOp;

/**

 * Removes the pseudonode associated to a topology error by merging

 * two touching linestrings. 

 * 

 * It will preserve the alphanumeric attributes of the largest linestring.

 * @author Alvaro Zabala

 *

 */

public class RemovePseudoNodeFix extends AbstractTopologyErrorFix {

        public void fix(TopologyError error) throws BaseException {

                EditableAdapter[] adapters = prepareEdition(error);

                List<IFeature> features2merge = new ArrayList<IFeature>();

                IFeature firstFeature = error.getFeature1();

                features2merge.add(firstFeature);

                Geometry firstJtsGeo = NewFConverter.toJtsGeometry(firstFeature.getGeometry());

                LineString[] firstLines = JtsUtil.extractLineStrings(firstJtsGeo);

                FGeometry errorGeom = (FGeometry) error.getGeometry();

                FPoint2D pseudonode = (FPoint2D) errorGeom.getInternalShape();

                double x = pseudonode.getX();

                double y = pseudonode.getY();

                double clusterTolerance = error.getTopology().getClusterTolerance();

                Rectangle2D queryRect = FGeometryUtil.getSnapRectangle(x, y,

                                clusterTolerance);

                FLyrVect originLyr = error.getOriginLayer();

                SelectableDataSource recordset = originLyr.getRecordset();

                int numberOfFields = recordset.getFieldCount();

                String[] fields = new String[numberOfFields];

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

                        fields[i] = recordset.getFieldName(i);

                }

                IFeatureIterator featureIterator = originLyr.getSource().

                                getFeatureIterator(queryRect, fields, null, false);

                while (featureIterator.hasNext()) {

                        IFeature candidate = featureIterator.next();

                        if (candidate.getID().equals(firstFeature.getID()))

                                continue;

                        Geometry secondJtsGeo = NewFConverter.toJtsGeometry(candidate.getGeometry());

                        LineString[] secondLines = JtsUtil.extractLineStrings(secondJtsGeo);

                        lookingForNestedPrimitive: 

                                for (int i = 0; i < firstLines.length; i++) {

                                LineString linA = firstLines[i];

                                Coordinate firstA = linA.getCoordinateN(0);

                                Coordinate lastA = linA.getCoordinateN(linA.getNumPoints() - 1);

                                for (int j = 0; j < secondLines.length; j++) {

                                        LineString linB = secondLines[j];

                                        Coordinate firstB = linB.getCoordinateN(0);

                                        Coordinate lastB = linB.getCoordinateN(linB.getNumPoints() - 1);

                                        //quizas deberia refinar esto, y comprobar que casan con el pseudonodo

                                        if (SnapCGAlgorithms.snapEquals2D(firstA, firstB,

                                                        clusterTolerance)

                                                        || SnapCGAlgorithms.snapEquals2D(firstA, lastB,

                                                                        clusterTolerance)

                                                        || SnapCGAlgorithms.snapEquals2D(lastA, firstB,

                                                                        clusterTolerance)

                                                        || SnapCGAlgorithms.snapEquals2D(firstA, lastB,

                                                                        clusterTolerance)) {

                                                features2merge.add(candidate);

                                                break lookingForNestedPrimitive;

                                        }// if

                                }// for j

                        }// for i

                }// while

                // at this point, features2merge has all the features whose geometries

                // we must to union

                double maxLength = -1;

                Iterator<IFeature> featuresIterator = features2merge.iterator();

                Geometry newJtsGeometry = null;

                Value[] attributes = null;

                LineMerger merger = new LineMerger();

                List geometries = new ArrayList();

                while (featuresIterator.hasNext()) {

                        IFeature feature = featuresIterator.next();

                        Geometry jtsGeometry = NewFConverter.toJtsGeometry(feature.getGeometry());//FIXME Este paso se podria ahorrar si creamos un FixFeature que cachee los JTS

                        double lenght = jtsGeometry.getLength();

                        if (lenght > maxLength) {

                                attributes = feature.getAttributes();

                                maxLength = lenght;

                        }

                        //with the union of the linestrings, we node them

                        if (newJtsGeometry == null)

                                newJtsGeometry = jtsGeometry;

                        else

                                newJtsGeometry = EnhancedPrecisionOp.union(newJtsGeometry,

                                                jtsGeometry);

                }

                //at this point, newJtsGeometry is a GeometryCollection with fully noded linestrings

                LineString[] lineStrings = JtsUtil.extractLineStrings(newJtsGeometry);

                geometries.addAll(Arrays.asList(lineStrings));

                merger.add(geometries);

                Collection mergedLineStrings = merger.getMergedLineStrings();

                Geometry[] geoms = new Geometry[mergedLineStrings.size()];

                mergedLineStrings.toArray(geoms);

                if(geoms.length == 1)

                        newJtsGeometry = geoms[0];

                else

                        newJtsGeometry = JtsUtil.GEOMETRY_FACTORY.createGeometryCollection(geoms);

                IGeometry newIGeometry = NewFConverter.toFMap(newJtsGeometry);

                String newId = error.getOriginLayer().getSource().getShapeCount()+"";

                DefaultFeature newFeature = new DefaultFeature(newIGeometry, attributes, newId);

//                adapters[0].startComplexRow();

                adapters[0].doAddRow(newFeature, EditionEvent.GRAPHIC);

                //now we remove the merged features

                for (int i = 0; i < features2merge.size(); i++) {

                        IFeature feature = features2merge.get(i);

//                        adapters[0].removeRow(Integer.parseInt(feature.getID()),

//                                                                                        getEditionDescription(), 

//                                                                                        EditionEvent.ROW_EDITION);

                        adapters[0].doRemoveRow(Integer.parseInt(feature.getID()), EditionEvent.ROW_EDITION);

                }

                //and created a new feature, with the attributes of the largest line

//                adapters[0].addRow(newFeature,getEditionDescription(), EditionEvent.GRAPHIC);

//                adapters[0].endComplexRow(getEditionDescription());

                error.getTopology().removeError(error);

        }

        public String getEditionDescription() {

                return Messages.getText("REMOVE_PSEUDONODE_FIX");

        }

        @Override

        public List<IFeature>[] fixAlgorithm(TopologyError error)

                        throws BaseException {

                throw new NotImplementedException();

        }

}