Application: gvSIG desktop » gvSIG projections

/* 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.crs.persistence;

import org.cresques.DataTypes;

import org.cresques.cts.ICoordTrans;

import org.cresques.cts.IProjection;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.persistence.AbstractSinglePersistenceFactory;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

/**

 * @author gvSIG Team

 * @version $Id$

 *

 */

public class CoordTransPersistenceFactory extends AbstractSinglePersistenceFactory {

    private static final String FIELD_SOURCE_PROJECTION = "source";

    private static final String DESCRIPTION_SOURCE_PROJECTION  = "Source projection";

    private static final String FIELD_DESTINATION_PROJECTION = "destination";

    private static final String DESCRIPTION_DESTINATION_PROJECTION = "Destination Projection";

    private static final String DYNCLASS_NAME = "CoordTrans";

    private static final String DYNCLASS_DESCRIPTION = "Coordinates Transformation";

    /**

     * Creates a new {@link CoordTransPersistenceFactory}.

     */

    public CoordTransPersistenceFactory() {

        super(ICoordTrans.class, DYNCLASS_NAME, DYNCLASS_DESCRIPTION, null, null);

        DynStruct definition = this.getDefinition();

        definition.addDynField(FIELD_SOURCE_PROJECTION).setDescription(

            DESCRIPTION_SOURCE_PROJECTION).setMandatory(true).setType(

                DataTypes.CRS);

        definition.addDynField(FIELD_DESTINATION_PROJECTION).setDescription(

            DESCRIPTION_DESTINATION_PROJECTION).setMandatory(true).setType(

                DataTypes.CRS);

    }

    public Object createFromState(PersistentState state)

            throws PersistenceException {

        IProjection sourceProjection = (IProjection)state.get(FIELD_SOURCE_PROJECTION);

        IProjection destinationProjection = (IProjection)state.get(FIELD_DESTINATION_PROJECTION);      

        return sourceProjection.getCT(destinationProjection);

    }

    public void saveToState(PersistentState state, Object obj)

            throws PersistenceException {

        state.set(FIELD_SOURCE_PROJECTION, ((ICoordTrans) obj).getPOrig());

        state.set(FIELD_DESTINATION_PROJECTION, ((ICoordTrans) obj).getPDest());

    }

}