java.io

Interface ObjectStreamConstants

public interface ObjectStreamConstants

This interface contains constants that are used in object serialization. This interface is used by ObjectOutputStream, ObjectInputStream, and ObjectStreamClass. The values for these constants are specified by the Java library specification.

Since: 1.1

Field Summary
int	baseWireHandle The first handle that will be assigned to an object, for later references.
int	PROTOCOL_VERSION_1 The serialization stream protocol version 1.
int	PROTOCOL_VERSION_2 The serialization stream protocol version 2.
byte	SC_BLOCK_DATA Flag used in `ObjectStreamClass` to designate that externalizable data is written in block data mode.
byte	SC_ENUM Flag used in `ObjectStreamClass` to designate that the class is an enum constant.
byte	SC_EXTERNALIZABLE Flag used in `ObjectStreamClass` to designate that the class is externalizable.
byte	SC_SERIALIZABLE Flag used in `ObjectStreamClass` to designate that the class is serializeable.
byte	SC_WRITE_METHOD Flag used in `ObjectStreamClass` to designate that the class defines the `writeObject` method.
short	STREAM_MAGIC The magic number that is written as part of the stream header.
short	STREAM_VERSION The stream version number that is written as part of the stream header.
SerializablePermission	SUBCLASS_IMPLEMENTATION_PERMISSION Constant for use with a `SecurityManager` to check if overriding of the `writeObject` and `readObject` methods is allowed.
SerializablePermission	SUBSTITUTION_PERMISSION Constant for use with a `SecurityManager` to check if substitution of objects is allowed.
byte	TC_ARRAY Token value to designate a new array is next in the stream.
byte	TC_BASE The first token value.
byte	TC_BLOCKDATA Token value to designate a block of primitive data is next in the stream.
byte	TC_BLOCKDATALONG Token value to designate a long block of primitive data is next in the stream.
byte	TC_CLASS Token reference to designate a reference to a class.
byte	TC_CLASSDESC Token value to designate a class descriptor is next in the stream.
byte	TC_ENDBLOCKDATA Token value to designate the end of a block of primitve data.
byte	TC_ENUM Token value to designate an enum constant is next in the stream.
byte	TC_EXCEPTION Token value to designate an exception occured during serialization.
byte	TC_LONGSTRING Token value to designate a long string is next in the stream.
byte	TC_MAX The last token value.
byte	TC_NULL Token value to designate a `null` reference in the stream.
byte	TC_OBJECT Token value to designate a new object is next in the stream.
byte	TC_PROXYCLASSDESC Token value to designate a proxy class descriptor is next in the stream.
byte	TC_REFERENCE Token value to designate a reference to an already serialized object.
byte	TC_RESET Token value to designate a reset of the stream state.
byte	TC_STRING Token value to designate a new string is next in the stream.

Field Detail

baseWireHandle

public int baseWireHandle

The first handle that will be assigned to an object, for later references.

PROTOCOL_VERSION_1

public int PROTOCOL_VERSION_1

The serialization stream protocol version 1. This version was the default serialization protocol before JDK 1.2.

Since: 1.2

PROTOCOL_VERSION_2

public int PROTOCOL_VERSION_2

The serialization stream protocol version 2. This version is used as the default serialization protocol since JDK 1.2.

Since: 1.2

SC_BLOCK_DATA

public byte SC_BLOCK_DATA

Flag used in ObjectStreamClass to designate that externalizable data is written in block data mode.

Since: 1.2

SC_ENUM

public byte SC_ENUM

Flag used in ObjectStreamClass to designate that the class is an enum constant.

Since: 1.5

SC_EXTERNALIZABLE

public byte SC_EXTERNALIZABLE

Flag used in ObjectStreamClass to designate that the class is externalizable.

SC_SERIALIZABLE

public byte SC_SERIALIZABLE

Flag used in ObjectStreamClass to designate that the class is serializeable.

SC_WRITE_METHOD

public byte SC_WRITE_METHOD

Flag used in ObjectStreamClass to designate that the class defines the writeObject method.

STREAM_MAGIC

public short STREAM_MAGIC

The magic number that is written as part of the stream header.

STREAM_VERSION

public short STREAM_VERSION

The stream version number that is written as part of the stream header. Note that this is different from the protocol version that specifies the data format for the stream.