001 /* Configuration.java
002 Copyright (C) 2004, 2006 Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package javax.security.auth.login;
040
041 import gnu.javax.security.auth.login.GnuConfiguration;
042
043 import java.security.AccessController;
044 import java.security.PrivilegedAction;
045 import java.security.Security;
046
047 import javax.security.auth.AuthPermission;
048
049 public abstract class Configuration
050 {
051 // Fields.
052 // -------------------------------------------------------------------------
053
054 private static Configuration config;
055
056 // Constructors.
057 // -------------------------------------------------------------------------
058
059 protected Configuration()
060 {
061 }
062
063 // Class methods.
064 // -------------------------------------------------------------------------
065
066 public static synchronized Configuration getConfiguration()
067 {
068 SecurityManager sm = System.getSecurityManager();
069 if (sm != null)
070 sm.checkPermission (new AuthPermission ("getLoginConfiguration"));
071 return getConfig();
072 }
073
074 public static synchronized void setConfiguration (Configuration config)
075 {
076 SecurityManager sm = System.getSecurityManager();
077 if (sm != null)
078 sm.checkPermission (new AuthPermission ("setLoginConfiguration"));
079 Configuration.config = config;
080 }
081
082 // Abstract methods.
083 // -------------------------------------------------------------------------
084
085 public abstract AppConfigurationEntry[] getAppConfigurationEntry (String applicationName);
086
087 public abstract void refresh();
088
089 // Package-private methods.
090 // -------------------------------------------------------------------------
091
092 /**
093 * Get the current configuration, bypassing security checks.
094 */
095 static Configuration getConfig()
096 {
097 if (config == null)
098 {
099 String conf = (String) AccessController.doPrivileged
100 (new PrivilegedAction()
101 {
102 public Object run()
103 {
104 return Security.getProperty ("login.configuration.provider");
105 }
106 });
107 try
108 {
109 if (conf != null)
110 config = (Configuration) Class.forName (conf).newInstance();
111 else
112 config = new GnuConfiguration();
113 }
114 catch (Exception x)
115 {
116 config = new GnuConfiguration();
117 }
118 }
119 return config;
120 }
121 }