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java.io
Interface ObjectStreamConstants

All Known Implementing Classes:
ObjectInputStream, ObjectOutputStream
public interface ObjectStreamConstants

Untamed: Constants written into the Object Serialization Stream.

Since:
JDK 1.1
Version:
1.30, 12/03/01
Author:
unascribed

Field Summary
static int baseWireHandle
          Enabled: First wire handle to be assigned.
static int PROTOCOL_VERSION_1
          Enabled: A Stream Protocol Version.
static int PROTOCOL_VERSION_2
          Enabled: A Stream Protocol Version.
static byte SC_BLOCK_DATA
          Enabled: Bit mask for ObejctStreamClass flag.
static byte SC_EXTERNALIZABLE
          Enabled: Bit mask for ObjectStreamClass flag.
static byte SC_SERIALIZABLE
          Enabled: Bit mask for ObjectStreamClass flag.
static byte SC_WRITE_METHOD
          Enabled: Bit mask for ObjectStreamClass flag.
static short STREAM_MAGIC
          Enabled: Magic number that is written to the stream header.
static short STREAM_VERSION
          Enabled: Version number that is written to the stream header.
static SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION
          Enabled: Enable overriding of readObject and writeObject.
static SerializablePermission SUBSTITUTION_PERMISSION
          Enabled: Enable substitution of one object for another during serialization/deserialization.
static byte TC_ARRAY
          Enabled: new Array.
static byte TC_BASE
          Enabled: First tag value.
static byte TC_BLOCKDATA
          Enabled: Block of optional data.
static byte TC_BLOCKDATALONG
          Enabled: long Block data.
static byte TC_CLASS
          Enabled: Reference to Class.
static byte TC_CLASSDESC
          Enabled: new Class Descriptor.
static byte TC_ENDBLOCKDATA
          Enabled: End of optional block data blocks for an object.
static byte TC_EXCEPTION
          Enabled: Exception during write.
static byte TC_LONGSTRING
          Enabled: Long string.
static byte TC_MAX
          Enabled: Last tag value.
static byte TC_NULL
          Enabled: Null object reference.
static byte TC_OBJECT
          Enabled: new Object.
static byte TC_PROXYCLASSDESC
          Enabled: new Proxy Class Descriptor.
static byte TC_REFERENCE
          Enabled: Reference to an object already written into the stream.
static byte TC_RESET
          Enabled: Reset stream context.
static byte TC_STRING
          Enabled: new String.
 

Field Detail

STREAM_MAGIC

public static final short STREAM_MAGIC
Enabled: Magic number that is written to the stream header.

STREAM_VERSION

public static final short STREAM_VERSION
Enabled: Version number that is written to the stream header.

TC_BASE

public static final byte TC_BASE
Enabled: First tag value.

TC_NULL

public static final byte TC_NULL
Enabled: Null object reference.

TC_REFERENCE

public static final byte TC_REFERENCE
Enabled: Reference to an object already written into the stream.

TC_CLASSDESC

public static final byte TC_CLASSDESC
Enabled: new Class Descriptor.

TC_OBJECT

public static final byte TC_OBJECT
Enabled: new Object.

TC_STRING

public static final byte TC_STRING
Enabled: new String.

TC_ARRAY

public static final byte TC_ARRAY
Enabled: new Array.

TC_CLASS

public static final byte TC_CLASS
Enabled: Reference to Class.

TC_BLOCKDATA

public static final byte TC_BLOCKDATA
Enabled: Block of optional data. Byte following tag indicates number of bytes in this block data.

TC_ENDBLOCKDATA

public static final byte TC_ENDBLOCKDATA
Enabled: End of optional block data blocks for an object.

TC_RESET

public static final byte TC_RESET
Enabled: Reset stream context. All handles written into stream are reset.

TC_BLOCKDATALONG

public static final byte TC_BLOCKDATALONG
Enabled: long Block data. The long following the tag indicates the number of bytes in this block data.

TC_EXCEPTION

public static final byte TC_EXCEPTION
Enabled: Exception during write.

TC_LONGSTRING

public static final byte TC_LONGSTRING
Enabled: Long string.

TC_PROXYCLASSDESC

public static final byte TC_PROXYCLASSDESC
Enabled: new Proxy Class Descriptor.

TC_MAX

public static final byte TC_MAX
Enabled: Last tag value.

baseWireHandle

public static final int baseWireHandle
Enabled: First wire handle to be assigned.

SC_WRITE_METHOD

public static final byte SC_WRITE_METHOD
Enabled: Bit mask for ObjectStreamClass flag. Indicates a Serializable class defines its own writeObject method.

SC_BLOCK_DATA

public static final byte SC_BLOCK_DATA
Enabled: Bit mask for ObejctStreamClass flag. Indicates Externalizable data written in Block Data mode. Added for PROTOCOL_VERSION_2.

Since:
1.2
See Also:
PROTOCOL_VERSION_2

SC_SERIALIZABLE

public static final byte SC_SERIALIZABLE
Enabled: Bit mask for ObjectStreamClass flag. Indicates class is Serializable.

SC_EXTERNALIZABLE

public static final byte SC_EXTERNALIZABLE
Enabled: Bit mask for ObjectStreamClass flag. Indicates class is Externalizable.

SUBSTITUTION_PERMISSION

public static final SerializablePermission SUBSTITUTION_PERMISSION
Enabled: Enable substitution of one object for another during serialization/deserialization.

Since:
1.2
See Also:
java.io.ObjectOutputStream#enableReplaceObject(boolean), java.io.ObjectInputStream#enableResolveObject(boolean)

SUBCLASS_IMPLEMENTATION_PERMISSION

public static final SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION
Enabled: Enable overriding of readObject and writeObject.

Since:
1.2
See Also:
java.io.ObjectOutputStream#writeObjectOverride(Object), java.io.ObjectInputStream#readObjectOverride()

PROTOCOL_VERSION_1

public static final int PROTOCOL_VERSION_1
Enabled: A Stream Protocol Version.

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.

Since:
1.2
See Also:
java.io.ObjectOutputStream#useProtocolVersion(int)

PROTOCOL_VERSION_2

public static final int PROTOCOL_VERSION_2
Enabled: A Stream Protocol Version.

This protocol is written by JVM 1.2. Externalizable data is written in block data mode and is terminated with TC_ENDBLOCKDATA. Externalizable classdescriptor 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.

Since:
1.2
See Also:
java.io.ObjectOutputStream#useProtocolVersion(int), SC_BLOCK_DATA
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