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1   /*
2    * @(#)JVMContextFactory.java Feb 1, 2003
3    * 
4    * Copyright (c) 2003 Delft University of Technology Jaffalaan 5, 2628 BX Delft,
5    * the Netherlands All rights reserved.
6    * 
7    * This software is proprietary information of Delft University of Technology
8    * The code is published under the General Public License
9    */
10  package nl.tudelft.simulation.naming;
11  
12  import java.util.Hashtable;
13  
14  import javax.naming.Context;
15  import javax.naming.spi.InitialContextFactory;
16  
17  import nl.tudelft.simulation.logger.Logger;
18  
19  /***
20   * A factory for JVMContext instances, automatically invoked by JNDI when the
21   * correct jndi.properties file has been used.
22   * <p>
23   * (c) copyright 2003 <a href="http://www.simulation.tudelft.nl">Delft
24   * University of Technology </a>, the Netherlands. <br>
25   * See for project information <a href="http://www.simulation.tudelft.nl">
26   * www.simulation.tudelft.nl </a> <br>
27   * License of use: <a href="http://www.gnu.org/copyleft/gpl.html">General Public
28   * License (GPL) </a>, no warranty <br>
29   * 
30   * @author <a href="http://www.simulation.tudelft.nl/people/jacobs.html">Peter
31   *         Jacobs </a>
32   * @version 1.2 2004-03-24
33   * @since 1.0
34   */
35  public class JVMContextFactory implements InitialContextFactory
36  {
37  	/*** context refers to the static JVMContext */
38  	private static JVMContext context = null;
39  
40  	/***
41  	 * @see javax.naming.spi.InitialContextFactory #getInitialContext(Hashtable)
42  	 */
43  	public synchronized Context getInitialContext(final Hashtable environment)
44  	{
45  		if (JVMContextFactory.context == null)
46  		{
47  			environment.remove("java.naming.factory.initial");
48  			if (environment.size() != 0)
49  			{
50  				Logger.warning(this, "getInitialContext",
51  						"unused environment variables in jndi.properties");
52  			}
53  			JVMContextFactory.context = new JVMContext();
54  		}
55  		return context;
56  	}
57  }