1 /* 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package java.util.prefs; 27 import java.util.*; 28 29 /** 30 * A factory object that generates Preferences objects. Providers of 31 * new {@link Preferences} implementations should provide corresponding 32 * <tt>PreferencesFactory</tt> implementations so that the new 33 * <tt>Preferences</tt> implementation can be installed in place of the 34 * platform-specific default implementation. 35 * 36 * <p><strong>This class is for <tt>Preferences</tt> implementers only. 37 * Normal users of the <tt>Preferences</tt> facility should have no need to 38 * consult this documentation.</strong> 39 * 40 * @author Josh Bloch 41 * @see Preferences 42 * @since 1.4 43 */ 44 public interface PreferencesFactory { 45 /** 46 * Returns the system root preference node. (Multiple calls on this 47 * method will return the same object reference.) 48 * @return the system root preference node 49 */ systemRoot()50 Preferences systemRoot(); 51 52 /** 53 * Returns the user root preference node corresponding to the calling 54 * user. In a server, the returned value will typically depend on 55 * some implicit client-context. 56 * @return the user root preference node corresponding to the calling 57 * user 58 */ userRoot()59 Preferences userRoot(); 60 } 61