01 /*
02 * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved.
03 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
04 *
05 * This code is free software; you can redistribute it and/or modify it
06 * under the terms of the GNU General Public License version 2 only, as
07 * published by the Free Software Foundation. Sun designates this
08 * particular file as subject to the "Classpath" exception as provided
09 * by Sun in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package java.util.prefs;
27
28 import java.util.*;
29
30 /**
31 * A factory object that generates Preferences objects. Providers of
32 * new {@link Preferences} implementations should provide corresponding
33 * <tt>PreferencesFactory</tt> implementations so that the new
34 * <tt>Preferences</tt> implementation can be installed in place of the
35 * platform-specific default implementation.
36 *
37 * <p><strong>This class is for <tt>Preferences</tt> implementers only.
38 * Normal users of the <tt>Preferences</tt> facility should have no need to
39 * consult this documentation.</strong>
40 *
41 * @author Josh Bloch
42 * @version 1.12, 05/05/07
43 * @see Preferences
44 * @since 1.4
45 */
46 public interface PreferencesFactory {
47 /**
48 * Returns the system root preference node. (Multiple calls on this
49 * method will return the same object reference.)
50 */
51 Preferences systemRoot();
52
53 /**
54 * Returns the user root preference node corresponding to the calling
55 * user. In a server, the returned value will typically depend on
56 * some implicit client-context.
57 */
58 Preferences userRoot();
59 }
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