/*
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * The Original Code is the Kowari Metadata Store.
 *
 * The Initial Developer of the Original Code is Plugged In Software Pty
 * Ltd (http://www.pisoftware.com, mailto:info@pisoftware.com). Portions
 * created by Plugged In Software Pty Ltd are Copyright (C) 2001,2002
 * Plugged In Software Pty Ltd. All Rights Reserved.
 *
 * Contributor(s): N/A.
 *
 * [NOTE: The text of this Exhibit A may differ slightly from the text
 * of the notices in the Source Code files of the Original Code. You
 * should use the text of this Exhibit A rather than the text found in the
 * Original Code Source Code for Your Modifications.]
 *
 */

package org.mulgara.store.stringpool.memory;

// Third-party packages
import org.apache.log4j.*;

// Local packages
import org.mulgara.resolver.spi.FactoryInitializer;
import org.mulgara.store.stringpool.StringPool;
import org.mulgara.store.stringpool.StringPoolFactory;

/**
 * A {@link StringPoolFactory} that constructs {@link MemoryStringPoolImpl}
 * instances.
 *
 * @created 2004-05-31
 *
 * @author <a href="http://staff.pisoftware.com/raboczi/">Simon Raboczi</a>
 *
 * @version $Revision: 1.1 $
 *
 * @modified $Date: 2005/02/20 11:06:03 $
 *
 * @maintenanceAuthor $Author: newmana $
 *
 * @company <A href="mailto:info@PIsoftware.com">Plugged In Software</A>
 *
 * @copyright © 2004 <A href="http://www.PIsoftware.com/">Plugged In
 *      Software Pty Ltd</A>
 *
 * @licence <a href="{@docRoot}/../../LICENCE">Mozilla Public License v1.1</a>
 */
public class MemoryStringPoolFactory implements StringPoolFactory
{
  /** Logger. */
  @SuppressWarnings("unused")
  private static final Logger logger = Logger.getLogger(MemoryStringPoolFactory.class.getName());

  /** The singleton instance of this class. */
  private static final StringPoolFactory stringPoolFactory = new MemoryStringPoolFactory();

  /**
   * This constructor is only for internal use.
   *
   * Use the {@link #newInstance} method to obtain instances.
   */
  private MemoryStringPoolFactory() {
    // null implementation
  }

  /**
   * Obtain the singleton instance of this factory.
   *
   * @param factoryInitializer  not used
   */
  static public StringPoolFactory newInstance(FactoryInitializer factoryInitializer) {
    return stringPoolFactory;
  }

  //
  // Methods implementing StringPoolFactory
  //

  /**
   * {@inheritDoc StringPoolFactory}
   */
  public StringPool newStringPool() {
    return new MemoryStringPoolImpl();
  }
}