org/objectweb/proactive/core/group/topology/Ring.java

/* 
 * ################################################################
 * 
 * ProActive: The Java(TM) library for Parallel, Distributed, 
 *            Concurrent computing with Security and Mobility
 * 
 * Copyright (C) 1997-2007 INRIA/University of Nice-Sophia Antipolis
 * Contact: proactive@objectweb.org
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 *  
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA
 *  
 *  Initial developer(s):               The ProActive Team
 *                        http://www.inria.fr/oasis/ProActive/contacts.html
 *  Contributor(s): 
 * 
 * ################################################################
 */ 
package org.objectweb.proactive.core.group.topology;

import org.objectweb.proactive.core.group.Group;
import org.objectweb.proactive.core.mop.ConstructionOfReifiedObjectFailedException;


public class Ring extends TopologyGroup { // implements Topology1D {

    protected int width;

    public Ring(Group g, int size)
        throws ConstructionOfReifiedObjectFailedException {
        super(g, size);
        this.width = size;
    }

    public int getWidth() {
        return this.width;
    }

    public int getX(Object o) {
        return this.indexOf(o);
    }

    public Object left(Object o) {
        int position = this.indexOf(o);
        if (position != 0) {
            return this.get(position - 1);
        } else {
            return this.get(this.getWidth() - 1);
        }
    }

    public Object right(Object o) {
        int position = this.indexOf(o);
        if (position != this.getWidth() - 1) {
            return this.get(position + 1);
        } else {
            return this.get(0);
        }
    }
}

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