| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Gobernment (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.

 *

 */

/*

 * AUTHORS (In addition to CIT):

 * 2008 {DiSiD Technologies}  {Implement data selection}

 */

package org.gvsig.fmap.dal.feature.impl.commands.implementation;

import org.gvsig.fmap.dal.exceptions.DataException;

import org.gvsig.fmap.dal.feature.FeatureReference;

import org.gvsig.fmap.dal.feature.FeatureReferenceSelection;

import org.gvsig.fmap.dal.feature.impl.commands.AbstractCommand;

/**

 * Command to allow undo and redo over a select or deselect operation performed

 * on a selection.

 * 

 * @author <a href="mailto:cordin@disid.com">C?sar Ordi?ana</a>

 */

public class SelectionCommandSelect extends AbstractCommand {

        private final FeatureReferenceSelection selection;

    private final FeatureReference reference;

    private final boolean select;

    public SelectionCommandSelect(FeatureReferenceSelection selection,

            FeatureReference reference, boolean select) {

        this.selection = selection;

        this.reference = reference;

        this.select = select;

        }

        public void execute() {

            // Nothing to do

        }

        public String getType() {

                return select ? "selectionSelect" : "selectionDeselect";

        }

        public void undo() throws DataException {

        performSelection(!select);

    }

        public void redo() throws DataException {

        performSelection(select);

        }

    private void performSelection(boolean doSelection) {

        if (doSelection) {

            selection.select(reference);

        } else {

            selection.deselect(reference);

        }

    }

}