Application: gvSIG desktop » gvSIG projections

/**

 * 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.cresques.coerce;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.crs.CRSFactory;

import org.gvsig.tools.dataTypes.CoercionException;

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

/**

 * Convert a string value of projection code to IProjection

 *

 * @author gvSIG Team

 * @version $Id$

 *

 */

public class CoerceToCRS implements Coercion {

    public Object coerce(Object value) throws CoercionException {

        if (value == null) {

            return null;

        }

        try {

            if (value instanceof IProjection) {

                return value;

            }

            Object proj = CRSFactory.getCRS(value.toString());

            if (proj == null) {

                throw new CoercionException("Can't convert value '" + getValueAsString(value) + "' to IProjection. Probably not a valid format for a projection.");

            }

            return proj;

        } catch (Exception e) {

            throw new CoercionException("Can't convert value '" + getValueAsString(value) + "' to IProjection. Probably not a valid format for a projection.", e);

        }

    }

    private String getValueAsString(Object value) {

        try {

            return value.toString();

        } catch (Exception e) {

            return "(unknow)";

        }

    }

}