| gvSIG desktop 1

/*

 * 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.topologyrules.jtsisvalidrules;

import org.gvsig.topology.AbstractTopologyRule;

import org.gvsig.topology.Messages;

import org.gvsig.topology.Topology;

import org.gvsig.topology.TopologyError;

import org.gvsig.topology.TopologyRuleDefinitionException;

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

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

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

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

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

import com.vividsolutions.jts.geom.Geometry;

import com.vividsolutions.jts.geomgraph.GeometryGraph;

/**

 * This rule checks that every geometry has at least the minimun number of points

 * to correctly define it.

 * For example: 

 * 

 * a) a polyline2d at least must have two points.

 * b) a polygon2d at least must have three non collinear points.

 * 

 * 

 * @author Alvaro Zabala

 *

 */

public class GeometryMustNotHaveFewPoints extends AbstractTopologyRule{

        public GeometryMustNotHaveFewPoints(FLyrVect originLyr) {

                super(originLyr);

        }

        public GeometryMustNotHaveFewPoints(){}

                public GeometryMustNotHaveFewPoints(Topology topology, FLyrVect originLyr) {

                        super(topology, originLyr);

                }

                public String getName() {

                        return Messages.getText("GEOMETRY_MUST_NOT_HAVE_FEW_POINTS");

                }

                public void checkPreconditions() throws TopologyRuleDefinitionException {

                        int shapeType;

                        try {

                                shapeType = this.originLyr.getShapeType();

                                switch(shapeType){

                                case FShape.POINT:

                                case FShape.TEXT:

                                case FShape.MULTIPOINT:

                                        throw new TopologyRuleDefinitionException("La regla Few Points no aplica sobre capas de puntos");

                        }

                        } catch (ReadDriverException e) {

                                throw new TopologyRuleDefinitionException("Error al tratar de verificar el tipo de geometria");

                        }

                }

                public void validateFeature(IFeature feature) {

                        IGeometry geometry = feature.getGeometry();

                        Geometry jtsGeo = geometry.toJTSGeometry();

                        if(jtsGeo.getDimension() == 0)

                                return;

                        GeometryGraph graph = new GeometryGraph(0, jtsGeo );

                    if (graph.hasTooFewPoints()) {//TODO JTS NO CONTEMPLA CURVAS....VER SI ES MEJOR DEFINIR ESTO CON FMAP

                      TopologyError error = new TopologyError(geometry, this, feature, topology );

                      this.errorContainer.addTopologyError(error);

                    }//if 

                }  

  }