Application: gvSIG desktop » gvSIG raster

/* 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.raster.gdal.util;

import org.cresques.cts.ICRSFactory;

import org.cresques.cts.IProjection;

import org.gvsig.fmap.crs.CRSFactory;

import org.gvsig.fmap.dal.coverage.util.CRSUtils;

import org.gvsig.jogr.CrsGdalException;

import org.gvsig.jogr.OGRException;

import org.gvsig.jogr.OGRSpatialReference;

import org.slf4j.LoggerFactory;

/**

 * Esta clase se encarga de hacer la conversion entre Wkt e IProjection.

 *

 * El uso se hace mediante dos llamadas estaticas que son: convertIProjectionToWkt y

 * convertWktToIProjection.

 *

 * Antes de usarlos, hay que saber si tenemos acceso a gvSIG e intentar coger el factory desde all?.

 * Ya que su uso consume tiempo y espacio de memoria y es preferible reaprovechar ese objeto ya

 * creado. Esto se hace con setCRSFactory.

 *

 * En caso de no asignarse el ya existente, el crear? uno interno y lo dejara en una variable estatica.

 *

 * @version 11/07/2008

 * @author BorSanZa - Borja S?nchez Zamorano (borja.sanchez@iver.es)

 */

public class DefaultCRSUtils implements CRSUtils {

        public ICRSFactory factory = null;

        public void setCRSFactory(ICRSFactory factory) {

                this.factory = factory;

        }

        /**

         * Devuelve el CRSFactory asignado desde fuera o creado desde dentro, todo depende de como se haya

         * usado.

         *

         * @param code

         * @return

         */

        private IProjection getCRS(String code) {

                if (factory == null)

                        factory = CRSFactory.cp;//new ProjectionPool();

                return factory.get(code);

        }

        public IProjection convertWktToIProjection(String wkt) {

                if (wkt == null || wkt.equals(""))

                        return null;

                String code = null;

                String name = null;

                OGRSpatialReference oSRSSource = new OGRSpatialReference();

                try {

                        OGRSpatialReference.importFromWkt(oSRSSource, wkt);

                        code = oSRSSource.getAuthorityCode("PROJCS");

                        if (code == null)

                                code = oSRSSource.getAuthorityCode("GEOGCS");

                        name = oSRSSource.getAuthorityName("PROJCS");

                        if (name == null)

                                name = oSRSSource.getAuthorityName("GEOGCS");

                        try {

                                if(name != null && code != null)

                                        return getCRS(name + ":" + code);

                        } catch (NumberFormatException ex) {

                                return null;

                        }

                } catch (OGRException e) {

                        LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo EPSG", e);

                } catch (CrsGdalException e) {

                        LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo EPSG", e);

                }

                return null;

        }

        public String convertIProjectionToWkt(IProjection projection) {

                if(projection == null)

                        return null;

                OGRSpatialReference oSRSSource = new OGRSpatialReference();

                String code = projection.getAbrev();

                String name = code.substring(0, code.indexOf(":"));

                code = code.substring(code.indexOf(":") + 1);

                try {

                        do

                                if (name.equals("EPSG")) {

                                        OGRSpatialReference.importFromEPSG(oSRSSource, Integer.parseInt(code));

                                        break;

                                }

                        while (false);

                        return OGRSpatialReference.exportToWkt(oSRSSource);

                } catch (CrsGdalException e) {

                        LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo WKT", e);

                } catch (NumberFormatException e) {

                        LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo WKT", e);

                } catch (OGRException e) {

                        LoggerFactory.getLogger(getClass().getName()).debug("Problemas obteniendo el c?digo WKT", e);

                }

                return null;

        }

}