openllet.shared.hash.SingletonSharedObjectFactory Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of openllet-functions Show documentation

Openllet management of abstracts functions

There is a newer version: 2.6.5

/*
 * Copyright (c) 2003-2007, CWI and INRIA
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 	- Redistributions of source code must retain the above copyright
 * 	notice, this list of conditions and the following disclaimer.
 * 	- 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.
 * 	- Neither the name of the CWI, INRIA nor the names of its
 * 	contributors may be used to endorse or promote products derived from
 * 	this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS 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 THE COPYRIGHT
 * OWNER OR 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.
 */

package openllet.shared.hash;

public class SingletonSharedObjectFactory
{

	/**
	 * Default constructor. Made private to prevent instantiation from outside this class.
	 */
	private SingletonSharedObjectFactory()
	{
		super();
	}

	/**
	 * Returns a reference to the openllet.shared.hash object factory.
	 *
	 * @return A reference to the openllet.shared.hash object factory.
	 */
	public static SharedObjectFactory getInstance()
	{
		return InstanceKeeper.instance;
	}

	/**
	 * Nested class that guarantees thread safe lazy intialization of the openllet.shared.hash object factory.
	 *
	 * @author Arnold Lankamp
	 */
	private static class InstanceKeeper
	{
		public final static SharedObjectFactory instance = new SharedObjectFactory();
	}
}