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;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.GeometryException;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.operation.GeometryOperationException;

import org.gvsig.fmap.geom.operation.GeometryOperationNotSupportedException;

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;

/**

 * Factory to manage the persistence of {@link Geometry} objects.

 * 

 * @author gvSIG Team

 * @version $Id$

 *

 */

public class GeometryPersistenceFactory extends AbstractSinglePersistenceFactory {

    private static final String FIELD_STRING = "string";

    private static final String FIELD_SRS = "srs";

    private static final String DYNCLASS_NAME = "Geometry";

    private static final String DYNCLASS_DESCRIPTION = "gvSIG Geometry";

    private static final String OPERATION_FIELD_NAME = "";

    private static final GeometryManager geometryManager = GeometryLocator.getGeometryManager();

    /**

     * @param theClass

     * @param name

     * @param description

     * @param domainName

     * @param domainUrl

     */

    protected GeometryPersistenceFactory() {

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

        DynStruct definition = this.getDefinition();

        definition.addDynFieldString(FIELD_STRING).setMandatory(true);

        definition.addDynFieldString(FIELD_SRS).setMandatory(false);

    }

    public Object createFromState(PersistentState state)

    throws PersistenceException {

        String string = state.getString(FIELD_STRING);

        String srs = state.getString(FIELD_SRS);

        try {

            return geometryManager.createFrom(string, srs);

        } catch (CreateGeometryException e) {

           throw new PersistenceException("Error creating the geometry", e);

        } catch (GeometryException e) {

            throw new PersistenceException("Error creating the geometry", e);

        }

    }

    public void saveToState(PersistentState state, Object obj)

    throws PersistenceException {

        try {

            state.set(FIELD_STRING, ((Geometry)obj).convertToWKT());

        } catch (GeometryOperationNotSupportedException e) {

            throw new PersistenceException("Error converting the geometry", e);

        } catch (GeometryOperationException e) {

            throw new PersistenceException("Error converting the geometry", e);

        }

    }

}