| 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.fmap.core.FGeometryUtil;

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.iver.utiles.XMLEntity;

/**

 * This rule checks if an FMap geometry is closed, always applying a 

 * given snap tolerance.

 * 

 * To check multigeometries and multipart geometries, we follow the

 * next guideline:

 * 

 * a) if geometry is multipart or multigeometry, to be closed all parts must be closed.

 * b) point geometries are not closed.

 *

 * @author Alvaro Zabala

 *

 */

public class IGeometryMustBeClosed extends AbstractTopologyRule {

        public static final String RULE_NAME = 

                                Messages.getText("LINEAR_RING_MUST_BE_CLOSED");

        private double snapTolerance;

        public IGeometryMustBeClosed(Topology topology, FLyrVect originLyr, double snapTolerance) {

                super(topology, originLyr);

                this.snapTolerance = snapTolerance;

        }

        public IGeometryMustBeClosed(){}

        public IGeometryMustBeClosed(FLyrVect originLyr, double snapTolerance) {

                this(null, originLyr, snapTolerance);

        }

        public String getDescription() {

                return RULE_NAME;

        }

        public void checkPreconditions() throws TopologyRuleDefinitionException {

                try {

                        int shapeType = this.originLyr.getShapeType();

                        if(shapeType == FShape.POINT || 

                                        shapeType == FShape.MULTIPOINT || 

                                        shapeType == FShape.TEXT)

                                throw new TopologyRuleDefinitionException();

                } catch (ReadDriverException e) {

                        e.printStackTrace();

                        throw new TopologyRuleDefinitionException("Error leyendo el tipo de geometria del driver",e);

                }        

        }

        public void validateFeature(IFeature feature) {

                IGeometry geometry = feature.getGeometry();

                if(! FGeometryUtil.isClosed(geometry, snapTolerance)){

                        IGeometry errorGeometry = FGeometryUtil.

                                                getGeometryToClose(geometry, snapTolerance);

                        addTopologyError(feature, errorGeometry);

                }

        }

        private void addTopologyError(IFeature errorFeature, IGeometry errorGeometry) {

                TopologyError error = 

                        new TopologyError(errorGeometry, this, errorFeature, topology);

                addTopologyError(error);

        }

        public XMLEntity getXMLEntity(){

                XMLEntity xml = super.getXMLEntity();

                xml.putProperty("snapTolerance", snapTolerance);

                return xml;

        }

        public void setXMLEntity(XMLEntity xml){

                super.setXMLEntity(xml);

                if(xml.contains("snapTolerance")){

                        snapTolerance = xml.getDoubleProperty("snapTolerance");

                }

        }

}