/*
 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 *
 * This software is open source.
 * See the bottom of this file for the licence.
 */

package org.orbeon.dom4j.util;

/**
 * <p>
 * <code>SingletonStrategy</code> is an interface used to provide common
 * factory access for the same object based on an implementation strategy for
 * singleton. Right now there are two that accompany this interface:
 * SimpleSingleton and PerThreadSingleton. This will replace previous usage of
 * ThreadLocal to allow for alternate strategies.
 * </p>
 *
 * @author <a href="mailto:ddlucas@users.sourceforge.net">David Lucas </a>
 * @version $Revision: 1.2 $
 */
public interface SingletonStrategy {
    /**
     * return a singleton instance of the class specified in setSingletonClass
     */
    Object instance();

    /**
     * reset the instance to a new instance for the implemented strategy
     */
    void reset();

    /**
     * set a singleton class name that will be used to create the singleton
     * based on the strategy implementation of this interface. The default
     * constructor of the class will be used and must be public.
     */
    void setSingletonClassName(String singletonClassName);
}

/*
 * Redistribution and use of this software and associated documentation
 * ("Software"), with or without modification, are permitted provided that the
 * following conditions are met:
 *
 * 1. Redistributions of source code must retain copyright statements and
 * notices. Redistributions must also contain a copy of this document.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name "DOM4J" must not be used to endorse or promote products derived
 * from this Software without prior written permission of MetaStuff, Ltd. For
 * written permission, please contact dom4j-info@metastuff.com.
 *
 * 4. Products derived from this Software may not be called "DOM4J" nor may
 * "DOM4J" appear in their names without prior written permission of MetaStuff,
 * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
 *
 * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
 *
 * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
 */