001    /* SerializablePermission.java -- Basic permissions related to serialization.
002       Copyright (C) 1998, 2000, 2003 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 java.io;
040    
041    import 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      */
060    public 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