/*
 * Copyright 1998-2009 University Corporation for Atmospheric Research/Unidata
 *
 * Portions of this software were developed by the Unidata Program at the
 * University Corporation for Atmospheric Research.
 *
 * Access and use of this software shall impose the following obligations
 * and understandings on the user. The user is granted the right, without
 * any fee or cost, to use, copy, modify, alter, enhance and distribute
 * this software, and any derivative works thereof, and its supporting
 * documentation for any purpose whatsoever, provided that this entire
 * notice appears in all copies of the software, derivative works and
 * supporting documentation.  Further, UCAR requests that the user credit
 * UCAR/Unidata in any publications that result from the use of this
 * software or in any product that includes this software. The names UCAR
 * and/or Unidata, however, may not be used in any advertising or publicity
 * to endorse or promote any products or commercial entity unless specific
 * written permission is obtained from UCAR/Unidata. The user also
 * understands that UCAR/Unidata is not obligated to provide the user with
 * any support, consulting, training or assistance of any kind with regard
 * to the use, operation and performance of this software nor to provide
 * the user with any updates, revisions, new versions or "bug fixes."
 *
 * THIS SOFTWARE IS PROVIDED BY UCAR/UNIDATA "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 UCAR/UNIDATA BE LIABLE FOR ANY SPECIAL,
 * INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE ACCESS, USE OR PERFORMANCE OF THIS SOFTWARE.
 */

package ucar.util.prefs;

/**
 *  Implementation of  <tt>PreferencesFactory</tt> to return PreferencesExt objects. Using this
 *  method of obtaining a Preferences object is optional; you can also just pass around the
 *  Preferences object explicitly.
 *
 *  The default Preferences.userRoot() and Preferences.systemRoot() are empty. To use
 *  persistent versions, you must set them explicitly through
 *  <pre>
 *    PreferencesExt.setSystemRoot( PreferencesExt prefs);
 *    PreferencesExt.setUserRoot( PreferencesExt prefs);
 *  </pre>
 *  and also call:
 *  <pre>
 *    System.setProperty("java.util.prefs.PreferencesFactory", "ucar.util.prefs.PreferencesExtFactory");
 *  </pre>
 *
 */
public class PreferencesExtFactory implements java.util.prefs.PreferencesFactory  {

    public java.util.prefs.Preferences userRoot() {
        return PreferencesExt.userRoot;
    }

    public java.util.prefs.Preferences systemRoot() {
        return PreferencesExt.systemRoot;
    }
}