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.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.primitive.Envelope;

import org.gvsig.tools.dataTypes.CoercionException;

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

/**

 * Convert a object to Geometry.

 * 

 * Support convert:

 * - Envelope to Envelope (do nothing)

 * - Geometry to Envelope

 * - WKB (byte[]) to Geometry

 * - WKT (String/toString) to Geometry

 * 

 *  

 * @author gvSIG Team

 * @version $Id$

 * 

 */

public class CoerceToEnvelope implements Coercion {

        public Object coerce(Object value) throws CoercionException {

                try {

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

                                return value;

                        }

                        if( value instanceof Geometry ) {

                                return ((Geometry)value).getEnvelope();

                        }

                        GeometryManager manager = GeometryLocator.getGeometryManager();

                        if( value instanceof byte[] ) {

                                Geometry geom = manager.createFrom((byte[])value);

                                return geom.getEnvelope();

                        }

                        Geometry geom = manager.createFrom(value.toString());

                        return geom.getEnvelope(); 

                } catch (Exception e) {

                        throw new CoercionException(e);

                }

        }

}