Application: gvSIG desktop

/* 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.

 *

 */

package org.gvsig.fmap.geom.impl.coerce;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.tools.dataTypes.CoercionException;

import org.gvsig.tools.dataTypes.DataTypesManager.Coercion;

/**

 * Convert a Geometry to String encoded as WKT.

 * 

 *  

 * @author gvSIG Team

 * @version $Id$

 * 

 */

public class CoerceToString implements Coercion {

        Coercion previous = null;

        public CoerceToString() {

                // Do nothing

        }

        public CoerceToString(Coercion previous) {

                this.previous = previous;

        }

        public Object coerce(Object value) throws CoercionException {

                try {

                        if( value == null || value instanceof String ) {

                                return value;

                        }

                        if( value instanceof Geometry ) {

                                return ((Geometry)value).convertToWKT();

                        }

                        if( previous != null ) {

                                return previous.coerce(value);

                        }

                } catch (Exception e) {

                        throw new CoercionException(e);

                }

                throw new CoercionException();

        }

}