001/*
002 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * All rights reserved. This program and the accompanying materials
005 * are made available under the terms of the Eclipse Public License v1.0
006 * which accompanies this distribution, and is available at
007 * http://www.eclipse.org/legal/epl-v10.html
008 *
009 * Contributors:
010 *     bstefanescu
011 */
012package org.nuxeo.ecm.automation.core.scripting;
013
014/**
015 * @author <a href="mailto:bs@nuxeo.com">Bogdan Stefanescu</a>
016 */
017public class Functions {
018
019    private static volatile Object fn = new CoreFunctions();
020
021    private Functions() {
022    }
023
024    public static void setInstance(Object fn) {
025        if (fn == null) {
026            fn = new CoreFunctions();
027        }
028        synchronized (Functions.class) {
029            Functions.fn = fn;
030        }
031    }
032
033    public static Object getInstance() {
034        Object o = fn;
035        if (o == null) {
036            synchronized (Functions.class) {
037                o = new CoreFunctions();
038                fn = o;
039            }
040        }
041        return o;
042    }
043
044}