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.fromjts;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

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.util.Converter;

/**

 * <p>

 * Converts a geometry from JTS to DAL format. This is a special geometry operation

 * because don't use the Geometry parameter and returns a JTS geometry. This kind

 * of operation can be called from the {@link GeometryManager} using invokeOperation.

 * </p>

 * <p>

 * This operation needs a JTS geometry loaded in the context. The only attribute

 * of the {@link GeometryOperation} have to be a geometry of this type and the ID 

 * of this attribute will be JTSGeometry.

 * </p>

 * 

 * @author Nacho Brodin (nachobrodin@gmail.com)

 *

 */

public class FromJTS extends GeometryOperation {

    public static final String NAME  = "fromJTS";

    public static final String PARAM = "JTSGeometry";

        protected static GeometryManager geomManager = GeometryLocator.getGeometryManager();

    public static final int CODE = geomManager.getGeometryOperationCode(NAME);        

        protected final static com.vividsolutions.jts.geom.GeometryFactory geomFactory = new com.vividsolutions.jts.geom.GeometryFactory();

        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 {

                Object obj = ctx.getAttribute("JTSGeometry");

                if(obj instanceof com.vividsolutions.jts.geom.Geometry) {

                        try {

                                return Converter.jtsToGeometry((com.vividsolutions.jts.geom.Geometry)obj);

                        } catch (CreateGeometryException e) {

                                throw new GeometryOperationException(e); 

                        }

                }

                return null;

        }

}