org/objectweb/proactive/ext/util/FutureList.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.ext.util;


import org.objectweb.proactive.ProActive;


public class FutureList {
    private java.util.Vector<Object> futureList;

    public FutureList() {
        futureList = new java.util.Vector<Object>();
    }

    public boolean add(Object o) {
        //      System.out.println("Adding future " + o);
        return this.futureList.add(o);
    }

    public boolean remove(Object o) {
        //      System.out.println("Trying to remove " + o);
        return this.futureList.remove(o);
    }

    public int size() {
        return this.futureList.size();
    }

    public Object get(int index) {
        return this.futureList.elementAt(index);
    }

    public boolean allAwaited() {
        boolean value = true;
        for (int i = 0; i < futureList.size(); i++) {
            value = value && ProActive.isAwaited(futureList.elementAt(i));
        }
        return value;
    }

    public boolean noneAwaited() {
        for (int i = 0; i < futureList.size(); i++) {
            if (ProActive.isAwaited(futureList.elementAt(i))) {
                return false;
            }
        }
        return true;
    }

    public int countAwaited() {
        int count = 0;
        for (int i = 0; i < futureList.size(); i++) {
            if (ProActive.isAwaited(futureList.elementAt(i))) {
                count++;
            }
        }
        return count;
    }

    public Object getOne() {
        if (this.countAwaited() == this.size()) {
            //System.out.println("still waiting " + this.countAwaited()+ " futures");
            //futurePool.waitForReply();
            return null;
        } else {
            Object temp;
            for (int i = 0; i < futureList.size(); i++) {
                temp = futureList.elementAt(i);
                if (!ProActive.isAwaited(temp)) {
                    return temp;
                }
            }
            return null;
        }
    }

    public Object removeOne() {
        Object tmp;
        tmp = this.getOne();
        if (tmp != null) {
            //  System.out.println("Removing future "  + tmp);
            //System.out.println("Result is " + this.remove(tmp));
            this.remove(tmp);
        }
        return tmp;
    }

    public Object waitAndGetOne() {
        this.waitOne();
        return this.getOne();
    }

    public Object waitAndRemoveOne() {
        this.waitOne();
        return this.removeOne();
    }

    public void waitAll() {
        ProActive.waitForAll(futureList);
    }

    public void waitOne() {
        ProActive.waitForAny(futureList);
    }

    public void waitN(int n) {
        java.util.Vector<Object> temp = new java.util.Vector<Object>(futureList);
        for (int i = 0; i < n; i++) {
            int index = ProActive.waitForAny(temp);
            temp.remove(index);
        }
    }

    public void waitTheNth(int n) {
        ProActive.waitForTheNth(futureList, n);
    }

    public Object waitAndGetTheNth(int n) {
        ProActive.waitForTheNth(futureList, n);
        return this.futureList.elementAt(n);
    }
}

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