001/* SerializablePermission.java -- Basic permissions related to serialization.
002   Copyright (C) 1998, 2000, 2003 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010 
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package java.io;
040
041import java.security.BasicPermission;
042
043/**
044  * This class models permissions related to serialization.  As a subclass
045  * of <code>BasicPermission</code>, this class has permissions that have
046  * a name only.  There is no associated action list.
047  * <p>
048  * There are currently two allowable permission names for this class:
049  * <ul>
050  * <li><code>enableSubclassImplementation</code> - Allows a subclass to
051  * override the default serialization behavior of objects.</li>
052  * <li><code>enableSubstitution</code> - Allows substitution of one object
053  * for another during serialization or deserialization.</li>
054  * </ul>
055  *
056  * @see java.security.BasicPermission
057  *
058  * @author Aaron M. Renn (arenn@urbanophile.com)
059  */
060public final class SerializablePermission extends BasicPermission
061{
062  static final long serialVersionUID = 8537212141160296410L;
063        
064  /*
065   * Class Variables
066   */
067
068  private static final String[] legal_names = { "enableSubclassImplementation",
069                                              "enableSubstitution" };
070  /*
071   * Constructors
072   */
073
074  /**
075    * This method initializes a new instance of 
076    * <code>SerializablePermission</code>
077    * that has the specified name.
078    *
079    * @param name The name of the permission.
080    *
081    * @exception IllegalArgumentException If the name is not valid for
082    * this class.
083    */
084  public SerializablePermission(String name)
085  {
086    this(name, null);
087  }
088
089  /**
090    * This method initializes a new instance of 
091    * <code>SerializablePermission</code>
092    * that has the specified name and action list.  Note that the action list
093    * is unused in this class.
094    *
095    * @param name The name of the permission.
096    * @param actions The action list (unused).
097    *
098    * @exception IllegalArgumentException If the name is not valid for 
099    * this class.
100    */
101  public SerializablePermission(String name, String actions)
102  {
103    super(name, actions);
104
105    for (int i = 0; i < legal_names.length; i++)
106      if (legal_names[i].equals(name))
107        return;
108
109    throw new IllegalArgumentException("Bad permission name:  " + name);
110  }
111
112} // class SerializablePermission
113