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.

* 

*/

/*

* AUTHORS (In addition to CIT):

* 2009 {DiSiD Technologies}  {{Task}}

*/

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

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

import org.gvsig.fmap.dal.feature.impl.undo.FeatureCommandsStack;

/**

 * Helper methods for the Default Selection implementation classes.

 * 

 * @see DefaultFeatureReferenceSelection

 * @see DefaultFeatureSelection

 * @author <a href="mailto:cordinyana@gvsig.org">C?sar Ordi?ana</a>

 */

public interface FeatureSelectionHelper {

    /**

     * If the store is in editing mode, it will have the count of added or

     * removed features. This is used to correct the total count of Features.

     * 

     * @return the total number of added and deleted features

     */

    long getFeatureStoreDeltaSize();

    /**

     * Returns the {@link FeatureCommandsStack} of the {@link FeatureStore}. If

     * the store is not in editing mode, this method may return null

     * 

     * @return the commands stack of the {@link FeatureStore}

     */

    FeatureCommandsStack getFeatureStoreCommandsStack();

}