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.type.persistence;

import org.gvsig.fmap.geom.GeometryException;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.type.GeometryType;

import org.gvsig.fmap.geom.type.GeometryTypeNotSupportedException;

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 persist {@link GeometryType} objects.

 * 

 * @author gvSIG Team

 * @version $Id$

 */

public class GeometryTypePersistenceFactory extends

    AbstractSinglePersistenceFactory {

    private static final GeometryManager geometryManager = GeometryLocator

        .getGeometryManager();

    private static final String DYNCLASS_NAME = "GeometryType";

    private static final String DYNCLASS_DESCRIPTION = "gvSIG Geometry type";

    private static final String FIELD_TYPE = "type";

    private static final String FIELD_SUBTYPE = "subtype";

    /**

     * Creates a new {@link GeometryTypePersistenceFactory}. It will persist

     * the geometry type and subtype values, and use it to load

     * {@link GeometryType}s from persistence by calling

     * {@link GeometryManager#getGeometryType(int, int)}.

     */

    public GeometryTypePersistenceFactory() {

        super(GeometryType.class, DYNCLASS_NAME, DYNCLASS_DESCRIPTION, null,

            null);

        DynStruct definition = this.getDefinition();

        definition.addDynFieldInt(FIELD_TYPE).setMandatory(true);

        definition.addDynFieldInt(FIELD_SUBTYPE).setMandatory(true);

    }

    public Object createFromState(PersistentState state)

        throws PersistenceException {

        int type = state.getInt(FIELD_TYPE);

        int subType = state.getInt(FIELD_SUBTYPE);

        try {

            return geometryManager.getGeometryType(type, subType);

        } catch (GeometryTypeNotSupportedException e) {

            throw new PersistenceException(

                "Error creating the geometry type with type = " + type

                    + ", subType = " + subType, e);

        } catch (GeometryException e) {

            throw new PersistenceException(

                "Error creating the geometry type with type = " + type

                    + ", subType = " + subType, e);

        }

    }

    public void saveToState(PersistentState state, Object obj)

        throws PersistenceException {

        GeometryType type = (GeometryType) obj;

        state.set(FIELD_TYPE, type.getType());

        state.set(FIELD_SUBTYPE, type.getSubType());

    }

}