GraphMappPolicyNoInc.java

/**
 * Replication Benchmarker
 * https://github.com/score-team/replication-benchmarker/
 * Copyright (C) 2013 LORIA / Inria / SCORE Team
 *
 * 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/>.
 */
package crdt.tree.graphtree.mapping;

import collect.HashMapSet;
import collect.Tree;
import crdt.tree.graphtree.Edge;
import crdt.tree.graphtree.GraphMappPolicy;
import java.util.Observable;

/**
 *
 * @author Stephane Martin
 */
public abstract class GraphMappPolicyNoInc<T> extends GraphMappPolicy {

    boolean fresh = false;
    Tree<T> tree;

    @Override
    public Tree lookup() {
        if (!fresh) {
            tree = getTreeFromMapping(this.getGcp().lookup());
        }

        return tree;
    }

    @Override
    public void update(Observable o, Object o1) {
        fresh = false;
    }

    abstract protected Tree<T> getTreeFromMapping(HashMapSet<T, Edge<T>> tree);
}