Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

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

import java.awt.geom.Point2D;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.Geometry.TYPES;

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.primitive.Point;

import org.gvsig.fmap.geom.type.GeometryType;

/**

 * @author <a href="mailto:jpiera@gvsig.org">Jorge Piera</a>

 */

public class PointDistance extends GeometryOperation{

    public static final String NAME = "distance";

        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 {

                Geometry geom2 = (Geometry)ctx.getAttribute("geom");

                GeometryType geomType2 = geom2.getGeometryType();

                if ((TYPES.POINT != geom.getType()) && TYPES.POINT != geomType2.getType()){

                        throw new UnsupportedOperationException("The distance only can be execudet between two points");

                }

                return new Double(Point2D.distance(((Point)geom).getX(),

                                ((Point)geom).getY(),

                                ((Point)geom2).getX(),

                                ((Point)geom2).getX()));

        }

}