HashMapPersister.java

/* AWE - Amanzi Wireless Explorer
 * http://awe.amanzi.org
 * (C) 2008-2009, AmanziTel AB
 *
 * This library is provided under the terms of the Eclipse Public License
 * as described at http://www.eclipse.org/legal/epl-v10.html. Any use,
 * reproduction or distribution of the library constitutes recipient's
 * acceptance of this agreement.
 *
 * This library is distributed WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

package org.amanzi.awe.render.network;

import java.awt.Point;
import java.util.HashMap;

import net.refractions.udig.project.IPersister;

import org.eclipse.ui.IMemento;

/**
 * Persister for storing HashMap to IMemento
 * 
 * @author Lagutko_N
 * @since 1.0.0
 */
public class HashMapPersister extends IPersister<HashMap<Long, Point>> {

    /** String ID_PARAM field */
    private static final String ID_PARAM = "id";
    /** String Y_PARAM field */
    private static final String Y_PARAM = "y";
    /** String X_PARAM field */
    private static final String X_PARAM = "x";
    /** String POINT_PARAM field */
    private static final String POINT_PARAM = "point";

    @SuppressWarnings({"unchecked", "rawtypes"})
    @Override
    public Class getPersistee() {
        return HashMap.class;
    }

    @Override
    public HashMap<Long, Point> load(IMemento memento) {
        HashMap<Long, Point> result = new HashMap<Long, Point>();

        for (IMemento pointMemento : memento.getChildren(POINT_PARAM)) {
            int x = pointMemento.getInteger(X_PARAM);
            int y = pointMemento.getInteger(Y_PARAM);
            long id = new Long(pointMemento.getInteger(ID_PARAM));

            Point point = new Point(x, y);
            result.put(id, point);
        }

        return result;
    }

    @Override
    public void save(HashMap<Long, Point> object, IMemento memento) {
        if ((object == null) || (memento == null)) {
            return;
        }
        for (Long key : object.keySet()) {
            Point point = object.get(key);
            IMemento pointChild = memento.createChild(POINT_PARAM);
            pointChild.putInteger(X_PARAM, point.x);
            pointChild.putInteger(Y_PARAM, point.y);
            pointChild.putInteger(ID_PARAM, key.intValue());
        }
    }

}