| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 *

 * 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., 51 Franklin Street, Fifth Floor, Boston,

 * MA  02110-1301, USA.

 *

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 IVER T.I. S.A.   {{Task}}

 */

/**

 *

 */

package org.gvsig.fmap.geom.operation.relationship;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.operation.GeometryOperation;

import org.gvsig.fmap.geom.operation.GeometryOperationContext;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

import org.gvsig.fmap.geom.operation.tojts.ToJTS;

import org.gvsig.fmap.geom.primitive.impl.DefaultNullGeometry;

/**

 *

 * @author Vicente Caballero Navarro

 *

 */

public class Crosses extends GeometryOperation {

        public static final String NAME = "crosses";

        public static final int CODE = GeometryLocator.getGeometryManager().

                getGeometryOperationCode(NAME);

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.geom.operation.GeometryOperation#getOperationIndex()

         */

        public int getOperationIndex() {

                return CODE;

        }

        /*

         * (non-Javadoc)

         *

         * @see org.gvsig.fmap.geom.operation.GeometryOperation#invoke(org.gvsig.fmap.geom.Geometry,

         *      org.gvsig.fmap.geom.operation.GeometryOperationContext)

         */

        public Object invoke(Geometry geom, GeometryOperationContext ctx)

        throws GeometryOperationException {

                DefaultRelationshipGeometryOperationContext myCtx = null;

                myCtx = (DefaultRelationshipGeometryOperationContext) ctx;

                Geometry otherGeom = myCtx.getGeom();

                if (otherGeom instanceof DefaultNullGeometry || geom instanceof DefaultNullGeometry){

                        return new Boolean(false);

                }

                // TODO optimizar esto para los rectangulos (envelope)

                com.vividsolutions.jts.geom.Geometry jtsGeom = null;

                com.vividsolutions.jts.geom.Geometry otherJtsGeom = null;

                try {

                        jtsGeom = (com.vividsolutions.jts.geom.Geometry) geom

                        .invokeOperation(ToJTS.CODE, null);

                } catch (GeometryOperationNotSupportedException e) {

                        throw new GeometryOperationException(geom.getType(), CODE, e);

                }

                try {

                        otherJtsGeom = (com.vividsolutions.jts.geom.Geometry) otherGeom

                        .invokeOperation(ToJTS.CODE, null);

                } catch (GeometryOperationNotSupportedException e) {

                        throw new GeometryOperationException(otherGeom.getType(), CODE, e);

                }

                if (jtsGeom!=null && otherJtsGeom!=null)

                        return new Boolean(jtsGeom.crosses(otherJtsGeom));

                return new Boolean(false);

        }

}