| /* |
| * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.io; |
| |
| /** |
| * Constants written into the Object Serialization Stream. |
| * |
| * @author unascribed |
| * @since JDK 1.1 |
| */ |
| public interface ObjectStreamConstants { |
| |
| /** |
| * Magic number that is written to the stream header. |
| */ |
| final static short STREAM_MAGIC = (short)0xaced; |
| |
| /** |
| * Version number that is written to the stream header. |
| */ |
| final static short STREAM_VERSION = 5; |
| |
| /* Each item in the stream is preceded by a tag |
| */ |
| |
| /** |
| * First tag value. |
| */ |
| final static byte TC_BASE = 0x70; |
| |
| /** |
| * Null object reference. |
| */ |
| final static byte TC_NULL = (byte)0x70; |
| |
| /** |
| * Reference to an object already written into the stream. |
| */ |
| final static byte TC_REFERENCE = (byte)0x71; |
| |
| /** |
| * new Class Descriptor. |
| */ |
| final static byte TC_CLASSDESC = (byte)0x72; |
| |
| /** |
| * new Object. |
| */ |
| final static byte TC_OBJECT = (byte)0x73; |
| |
| /** |
| * new String. |
| */ |
| final static byte TC_STRING = (byte)0x74; |
| |
| /** |
| * new Array. |
| */ |
| final static byte TC_ARRAY = (byte)0x75; |
| |
| /** |
| * Reference to Class. |
| */ |
| final static byte TC_CLASS = (byte)0x76; |
| |
| /** |
| * Block of optional data. Byte following tag indicates number |
| * of bytes in this block data. |
| */ |
| final static byte TC_BLOCKDATA = (byte)0x77; |
| |
| /** |
| * End of optional block data blocks for an object. |
| */ |
| final static byte TC_ENDBLOCKDATA = (byte)0x78; |
| |
| /** |
| * Reset stream context. All handles written into stream are reset. |
| */ |
| final static byte TC_RESET = (byte)0x79; |
| |
| /** |
| * long Block data. The long following the tag indicates the |
| * number of bytes in this block data. |
| */ |
| final static byte TC_BLOCKDATALONG= (byte)0x7A; |
| |
| /** |
| * Exception during write. |
| */ |
| final static byte TC_EXCEPTION = (byte)0x7B; |
| |
| /** |
| * Long string. |
| */ |
| final static byte TC_LONGSTRING = (byte)0x7C; |
| |
| /** |
| * new Proxy Class Descriptor. |
| */ |
| final static byte TC_PROXYCLASSDESC = (byte)0x7D; |
| |
| /** |
| * new Enum constant. |
| * @since 1.5 |
| */ |
| final static byte TC_ENUM = (byte)0x7E; |
| |
| /** |
| * Last tag value. |
| */ |
| final static byte TC_MAX = (byte)0x7E; |
| |
| /** |
| * First wire handle to be assigned. |
| */ |
| final static int baseWireHandle = 0x7e0000; |
| |
| |
| /******************************************************/ |
| /* Bit masks for ObjectStreamClass flag.*/ |
| |
| /** |
| * Bit mask for ObjectStreamClass flag. Indicates a Serializable class |
| * defines its own writeObject method. |
| */ |
| final static byte SC_WRITE_METHOD = 0x01; |
| |
| /** |
| * Bit mask for ObjectStreamClass flag. Indicates Externalizable data |
| * written in Block Data mode. |
| * Added for PROTOCOL_VERSION_2. |
| * |
| * @see #PROTOCOL_VERSION_2 |
| * @since 1.2 |
| */ |
| final static byte SC_BLOCK_DATA = 0x08; |
| |
| /** |
| * Bit mask for ObjectStreamClass flag. Indicates class is Serializable. |
| */ |
| final static byte SC_SERIALIZABLE = 0x02; |
| |
| /** |
| * Bit mask for ObjectStreamClass flag. Indicates class is Externalizable. |
| */ |
| final static byte SC_EXTERNALIZABLE = 0x04; |
| |
| /** |
| * Bit mask for ObjectStreamClass flag. Indicates class is an enum type. |
| * @since 1.5 |
| */ |
| final static byte SC_ENUM = 0x10; |
| |
| |
| /* *******************************************************************/ |
| /* Security permissions */ |
| |
| /** |
| * Enable substitution of one object for another during |
| * serialization/deserialization. |
| * |
| * @see java.io.ObjectOutputStream#enableReplaceObject(boolean) |
| * @see java.io.ObjectInputStream#enableResolveObject(boolean) |
| * @since 1.2 |
| */ |
| final static SerializablePermission SUBSTITUTION_PERMISSION = |
| new SerializablePermission("enableSubstitution"); |
| |
| /** |
| * Enable overriding of readObject and writeObject. |
| * |
| * @see java.io.ObjectOutputStream#writeObjectOverride(Object) |
| * @see java.io.ObjectInputStream#readObjectOverride() |
| * @since 1.2 |
| */ |
| final static SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION = |
| new SerializablePermission("enableSubclassImplementation"); |
| /** |
| * A Stream Protocol Version. <p> |
| * |
| * All externalizable data is written in JDK 1.1 external data |
| * format after calling this method. This version is needed to write |
| * streams containing Externalizable data that can be read by |
| * pre-JDK 1.1.6 JVMs. |
| * |
| * @see java.io.ObjectOutputStream#useProtocolVersion(int) |
| * @since 1.2 |
| */ |
| public final static int PROTOCOL_VERSION_1 = 1; |
| |
| |
| /** |
| * A Stream Protocol Version. <p> |
| * |
| * This protocol is written by JVM 1.2. |
| * |
| * Externalizable data is written in block data mode and is |
| * terminated with TC_ENDBLOCKDATA. Externalizable class descriptor |
| * flags has SC_BLOCK_DATA enabled. JVM 1.1.6 and greater can |
| * read this format change. |
| * |
| * Enables writing a nonSerializable class descriptor into the |
| * stream. The serialVersionUID of a nonSerializable class is |
| * set to 0L. |
| * |
| * @see java.io.ObjectOutputStream#useProtocolVersion(int) |
| * @see #SC_BLOCK_DATA |
| * @since 1.2 |
| */ |
| public final static int PROTOCOL_VERSION_2 = 2; |
| } |