libjava/java/io/ObjectStreamConstants.java

/* ObjectStreamConstants.java -- Interface containing constant values
   used in reading and writing serialized objects
   Copyright (C) 1998, 1999 Free Software Foundation, Inc.

This file is part of GNU Classpath.

GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.

As a special exception, if you link this library with other files to
produce an executable, this library does not by itself cause the
resulting executable to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why the
executable file might be covered by the GNU General Public License. */


package java.io;

/**
   This interface contains constants that are used in object
   serialization.  This interface is used by ObjectOutputStream,
   ObjectInputStream, ObjectStreamClass, and possibly other classes.
   The values for these constants are specified in Javasoft's "Object
   Serialization Specification" TODO: add reference
*/
public interface ObjectStreamConstants
{
  public final static int PROTOCOL_VERSION_1 = 1;
  public final static int PROTOCOL_VERSION_2 = 2;

  final static short STREAM_MAGIC = (short)0xaced;
  final static short STREAM_VERSION = 5;

  final static byte TC_NULL = (byte)112;
  final static byte TC_REFERENCE = (byte)113;
  final static byte TC_CLASSDESC = (byte)114;
  final static byte TC_OBJECT = (byte)115;
  final static byte TC_STRING = (byte)116;
  final static byte TC_ARRAY = (byte)117;
  final static byte TC_CLASS = (byte)118;
  final static byte TC_BLOCKDATA = (byte)119;
  final static byte TC_ENDBLOCKDATA = (byte)120;
  final static byte TC_RESET = (byte)121;
  final static byte TC_BLOCKDATALONG = (byte)122;
  final static byte TC_EXCEPTION = (byte)123;

  final static byte TC_BASE = TC_NULL;
  final static byte TC_MAX = TC_EXCEPTION;

  final static int baseWireHandle = 0x7e0000;

  final static byte SC_WRITE_METHOD = 0x01;
  final static byte SC_SERIALIZABLE = 0x02;
  final static byte SC_EXTERNALIZABLE = 0x04;
  final static byte SC_BLOCK_DATA = 0x08;

  final static SerializablePermission SUBSTITUTION_PERMISSION
    = new SerializablePermission("enableSubstitution");

  final static SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION
    = new SerializablePermission("enableSubclassImplementation");
}