MementoSaveCacheUtility.java

/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   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 3 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, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.gui.client.model.memento.save;

import java.util.ListIterator;
import org.geosdi.geoplatform.gui.action.ISave;
import org.geosdi.geoplatform.gui.client.config.MementoModuleInjector;
import org.geosdi.geoplatform.gui.client.model.memento.save.bean.MementoSaveAddedFolder;
import org.geosdi.geoplatform.gui.client.model.memento.save.bean.MementoSaveAddedLayers;
import org.geosdi.geoplatform.gui.model.memento.IMemento;
import org.geosdi.geoplatform.gui.model.tree.AbstractFolderTreeNode;
import org.geosdi.geoplatform.gui.model.tree.GPBeanTreeModel;
import org.geosdi.geoplatform.gui.model.tree.GPLayerTreeModel;

/**
 * @author Nazzareno Sileno - CNR IMAA geoSDI Group
 * @email nazzareno.sileno@geosdi.org
 *
 * This class is usefull on sync application version to delete the add operation
 * from cache after a remove operation that interest the same object
 */
public class MementoSaveCacheUtility {

    /**
     *
     * @return true if a creational memento was removed
     */
    public static boolean cleanCacheFromSaveAddOperation(GPBeanTreeModel element) {
        boolean condition = false;
        IMementoSave mementoSave = MementoModuleInjector.MainInjector.getInstance().getMementoSave();
        IMemento<ISave> memento;
        for (ListIterator<IMemento<ISave>> it = mementoSave.listIterator(); it.hasNext();) {
            memento = it.next();
            if (verifyCondition(element, memento)) {
                mementoSave.remove(memento);
                condition = true;
                break;
            }
        }
        return condition;
    }

    private static boolean verifyCondition(GPBeanTreeModel element, IMemento<ISave> memento) {
        boolean condition = false;
        if (element instanceof AbstractFolderTreeNode) {
            condition = verifyFolderCondition((AbstractFolderTreeNode) element, memento);
        } else if (element instanceof GPLayerTreeModel) {
            condition = verifyLayerCondition((GPLayerTreeModel) element, memento);
        }
        return condition;
    }

    private static boolean verifyLayerCondition(GPLayerTreeModel layer, IMemento<ISave> memento) {
        boolean condition = false;
        if (memento instanceof MementoSaveAddedLayers
                && ((MementoSaveAddedLayers) memento).getAddedLayers().size() == 1
                && ((MementoSaveAddedLayers) memento).getAddedLayers().get(0).getRefBaseElement().equals(layer)) {
            condition = true;
        }
        return condition;
    }

    private static boolean verifyFolderCondition(AbstractFolderTreeNode folder, IMemento<ISave> memento) {
        boolean condition = false;
        if (memento instanceof MementoSaveAddedFolder
                && ((MementoSaveAddedFolder) memento).getAddedFolder().getRefBaseElement().equals(folder)) {
            condition = true;
        }
        return condition;
    }
}