jumppushmodulefactory.java

来自「This is a resource based on j2me embedde」· Java 代码 · 共 61 行

/*
 * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License version
 * 2 only, as published by the Free Software Foundation.
 * 
 * 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 version 2 for more details (a copy is
 * included at /legal/license.txt).
 * 
 * You should have received a copy of the GNU General Public License
 * version 2 along with this work; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 * 
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
 * Clara, CA 95054 or visit www.sun.com if you need additional
 * information or have any questions.
 */

package com.sun.midp.jump.push.executive;

import com.sun.jump.module.JUMPModuleFactory;

public abstract class JUMPPushModuleFactory extends JUMPModuleFactory {
    private static JUMPPushModuleFactory INSTANCE = null;

    /**
     * Gets an instance of factory.
     *
     * @return instance of factory (cannot be <code>null</code>)
     */
    public static JUMPPushModuleFactory getInstance() {
        return INSTANCE;
    }

    /**
     * Constructor.
     *
     * To be used by subclasses only
     */
    protected JUMPPushModuleFactory() {
        synchronized (JUMPPushModuleFactory.class) {
            if (INSTANCE == null) {
                INSTANCE = this;
            }
        }
    }

    /**
     * Gets an instance of push module.
     *
     * @return an instance of Push module
     */
    public abstract JUMPPushModule getPushModule();
}