All Known Implementing Classes:

ObjectInputStream, ObjectOutputStream

public interface ObjectStreamConstants

Since:

JDK 1.1

• Field Summary

  Fields

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

• Field Detail

  • STREAM_MAGIC

    static final short STREAM_MAGIC

    Magic number that is written to the stream header.

    See Also:

    Constant Field Values

  • STREAM_VERSION

    static final short STREAM_VERSION

    Version number that is written to the stream header.

    See Also:

    Constant Field Values

  • TC_BASE

    static final byte TC_BASE

    First tag value.

    See Also:

    Constant Field Values

  • TC_NULL

    static final byte TC_NULL

    Null object reference.

    See Also:

    Constant Field Values

  • TC_REFERENCE

    static final byte TC_REFERENCE

    Reference to an object already written into the stream.

    See Also:

    Constant Field Values

  • TC_CLASSDESC

    static final byte TC_CLASSDESC

    new Class Descriptor.

    See Also:

    Constant Field Values

  • TC_OBJECT

    static final byte TC_OBJECT

    new Object.

    See Also:

    Constant Field Values

  • TC_STRING

    static final byte TC_STRING

    new String.

    See Also:

    Constant Field Values

  • TC_ARRAY

    static final byte TC_ARRAY

    new Array.

    See Also:

    Constant Field Values

  • TC_CLASS

    static final byte TC_CLASS

    Reference to Class.

    See Also:

    Constant Field Values

  • TC_BLOCKDATA

    static final byte TC_BLOCKDATA

    Block of optional data. Byte following tag indicates number of bytes in this block data.

    See Also:

    Constant Field Values

  • TC_ENDBLOCKDATA

    static final byte TC_ENDBLOCKDATA

    End of optional block data blocks for an object.

    See Also:

    Constant Field Values

  • TC_RESET

    static final byte TC_RESET

    Reset stream context. All handles written into stream are reset.

    See Also:

    Constant Field Values

  • TC_BLOCKDATALONG

    static final byte TC_BLOCKDATALONG

    long Block data. The long following the tag indicates the number of bytes in this block data.

    See Also:

    Constant Field Values

  • TC_EXCEPTION

    static final byte TC_EXCEPTION

    Exception during write.

    See Also:

    Constant Field Values

  • TC_LONGSTRING

    static final byte TC_LONGSTRING

    Long string.

    See Also:

    Constant Field Values

  • TC_PROXYCLASSDESC

    static final byte TC_PROXYCLASSDESC

    new Proxy Class Descriptor.

    See Also:

    Constant Field Values

  • TC_ENUM

    static final byte TC_ENUM

    new Enum constant.

    Since:

    1.5

    See Also:

    Constant Field Values

  • TC_MAX

    static final byte TC_MAX

    Last tag value.

    See Also:

    Constant Field Values

  • baseWireHandle

    static final int baseWireHandle

    First wire handle to be assigned.

    See Also:

    Constant Field Values

  • SC_WRITE_METHOD

    static final byte SC_WRITE_METHOD

    Bit mask for ObjectStreamClass flag. Indicates a Serializable class defines its own writeObject method.

    See Also:

    Constant Field Values

  • SC_BLOCK_DATA

    static final byte SC_BLOCK_DATA

    Bit mask for ObjectStreamClass flag. Indicates Externalizable data written in Block Data mode. Added for PROTOCOL_VERSION_2.

    Since:

    1.2

    See Also:

    PROTOCOL_VERSION_2, Constant Field Values

  • SC_SERIALIZABLE

    static final byte SC_SERIALIZABLE

    Bit mask for ObjectStreamClass flag. Indicates class is Serializable.

    See Also:

    Constant Field Values

  • SC_EXTERNALIZABLE

    static final byte SC_EXTERNALIZABLE

    Bit mask for ObjectStreamClass flag. Indicates class is Externalizable.

    See Also:

    Constant Field Values

  • SC_ENUM

    static final byte SC_ENUM

    Bit mask for ObjectStreamClass flag. Indicates class is an enum type.

    Since:

    1.5

    See Also:

    Constant Field Values

  • SUBSTITUTION_PERMISSION

    static final SerializablePermission SUBSTITUTION_PERMISSION

    Enable substitution of one object for another during serialization/deserialization.

    Since:

    1.2

    See Also:

    ObjectOutputStream.enableReplaceObject(boolean), ObjectInputStream.enableResolveObject(boolean)

  • SUBCLASS_IMPLEMENTATION_PERMISSION

    static final SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION

    Enable overriding of readObject and writeObject.

    Since:

    1.2

    See Also:

    ObjectOutputStream.writeObjectOverride(Object), ObjectInputStream.readObjectOverride()

  • PROTOCOL_VERSION_1

    static final int PROTOCOL_VERSION_1

    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:

    ObjectOutputStream.useProtocolVersion(int), Constant Field Values

  • PROTOCOL_VERSION_2

    static final int PROTOCOL_VERSION_2

    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 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.

    Since:

    1.2

    See Also:

    ObjectOutputStream.useProtocolVersion(int), SC_BLOCK_DATA, Constant Field Values