ObjectStreamConstants

public interface ObjectStreamConstants

Known Indirect Subclasses ObjectInputStream, ObjectOutputStream ObjectInputStream An ObjectInputStream deserializes primitive data and objects previously written using an ObjectOutputStream.  ObjectOutputStream An ObjectOutputStream writes primitive data types and graphs of Java objects to an OutputStream.

A helper interface with constants used by the serialization implementation.

Constant Summary

int	PROTOCOL_VERSION_1	Stream protocol version 1.
int	PROTOCOL_VERSION_2	Stream protocol version 2.
byte	SC_BLOCK_DATA	Bit mask for the flag field in ObjectStreamClass.
byte	SC_ENUM	Bit mask for the flag field in ObjectStreamClass.
byte	SC_EXTERNALIZABLE	Bit mask for the flag field in ObjectStreamClass.
byte	SC_SERIALIZABLE	Bit mask for the flag field in ObjectStreamClass.
byte	SC_WRITE_METHOD	Bit mask for the flag field in ObjectStreamClass.
short	STREAM_MAGIC	The stream header's magic number.
short	STREAM_VERSION	The stream header's version number.
byte	TC_ARRAY	Tag to mark a new array.
byte	TC_BASE	The minimum tag value.
byte	TC_BLOCKDATA	Tag to mark a block of optional data.
byte	TC_BLOCKDATALONG	Tag to mark a long block of data.
byte	TC_CLASS	Tag to mark a reference to a class.
byte	TC_CLASSDESC	Tag to mark a new class descriptor.
byte	TC_ENDBLOCKDATA	Tag to mark the end of block data blocks for an object.
byte	TC_ENUM	Tag to mark a new enum.
byte	TC_EXCEPTION	Tag to mark an exception.
byte	TC_LONGSTRING	Tag to mark a long string.
byte	TC_MAX	The maximum tag value.
byte	TC_NULL	Tag to mark a null object reference.
byte	TC_OBJECT	Tag to mark a new object.
byte	TC_PROXYCLASSDESC	Tag to mark a new proxy class descriptor.
byte	TC_REFERENCE	Tag to mark a reference to an object that has already been written to the stream.
byte	TC_RESET	Tag to mark a stream reset.
byte	TC_STRING	Tag to mark a new string.
int	baseWireHandle	Handle for the first object that gets serialized.

Field Summary

public static final SerializablePermission	SUBCLASS_IMPLEMENTATION_PERMISSION	Permission constant to enable subclassing of ObjectInputStream and ObjectOutputStream.
public static final SerializablePermission	SUBSTITUTION_PERMISSION	Permission constant to enable object substitution during serialization and deserialization.

Constants

public static final int PROTOCOL_VERSION_1

Stream protocol version 1.

Constant Value: 1

public static final int PROTOCOL_VERSION_2

Stream protocol version 2.

Constant Value: 2

public static final byte SC_BLOCK_DATA

Bit mask for the flag field in ObjectStreamClass. Indicates that an externalizable class is written in block data mode.

Constant Value: 8

public static final byte SC_ENUM

Bit mask for the flag field in ObjectStreamClass. Indicates that a class is an enum type.

Constant Value: 16

public static final byte SC_EXTERNALIZABLE

Bit mask for the flag field in ObjectStreamClass. Indicates that a class is externalizable.

Constant Value: 4

public static final byte SC_SERIALIZABLE

Bit mask for the flag field in ObjectStreamClass. Indicates that a class is serializable.

Constant Value: 2

public static final byte SC_WRITE_METHOD

Bit mask for the flag field in ObjectStreamClass. Indicates that a serializable class has its own writeObject method.

Constant Value: 1

public static final short STREAM_MAGIC

The stream header's magic number.

Constant Value: -21267

public static final short STREAM_VERSION

The stream header's version number.

Constant Value: 5

public static final byte TC_ARRAY

Tag to mark a new array.

Constant Value: 117

public static final byte TC_BASE

The minimum tag value.

Constant Value: 112

public static final byte TC_BLOCKDATA

Tag to mark a block of optional data. The byte following this tag indicates the size of the block.

Constant Value: 119

public static final byte TC_BLOCKDATALONG

Tag to mark a long block of data. The long following this tag indicates the size of the block.

Constant Value: 122

public static final byte TC_CLASS

Tag to mark a reference to a class.

Constant Value: 118

public static final byte TC_CLASSDESC

Tag to mark a new class descriptor.

Constant Value: 114

public static final byte TC_ENDBLOCKDATA

Tag to mark the end of block data blocks for an object.

Constant Value: 120

public static final byte TC_ENUM

Tag to mark a new enum.

Constant Value: 126

public static final byte TC_EXCEPTION

Tag to mark an exception.

Constant Value: 123

public static final byte TC_LONGSTRING

Tag to mark a long string.

Constant Value: 124

public static final byte TC_MAX

The maximum tag value.

Constant Value: 126

public static final byte TC_NULL

Tag to mark a null object reference.

Constant Value: 112

public static final byte TC_OBJECT

Tag to mark a new object.

Constant Value: 115

public static final byte TC_PROXYCLASSDESC

Tag to mark a new proxy class descriptor.

Constant Value: 125

public static final byte TC_REFERENCE

Tag to mark a reference to an object that has already been written to the stream.

Constant Value: 113

public static final byte TC_RESET

Tag to mark a stream reset.

Constant Value: 121

public static final byte TC_STRING

Tag to mark a new string.

Constant Value: 116

public static final int baseWireHandle

Handle for the first object that gets serialized.

Constant Value: 8257536

Fields

public static final SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION

Permission constant to enable subclassing of ObjectInputStream and ObjectOutputStream.

public static final SerializablePermission SUBSTITUTION_PERMISSION

Permission constant to enable object substitution during serialization and deserialization.