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java.io
Interface ObjectStreamConstants

All Known Implementing Classes:

ObjectInputStream, ObjectOutputStream

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public interface ObjectStreamConstants

Untamed: Constants written into the Object Serialization Stream.

Since:

JDK 1.1

Version:

1.30, 12/03/01

Author:

unascribed

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STREAM_MAGIC

public static final short STREAM_MAGIC

Enabled: Magic number that is written to the stream header.

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STREAM_VERSION

public static final short STREAM_VERSION

Enabled: Version number that is written to the stream header.

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TC_BASE

public static final byte TC_BASE

Enabled: First tag value.

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TC_NULL

public static final byte TC_NULL

Enabled: Null object reference.

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TC_REFERENCE

public static final byte TC_REFERENCE

Enabled: Reference to an object already written into the stream.

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TC_CLASSDESC

public static final byte TC_CLASSDESC

Enabled: new Class Descriptor.

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TC_OBJECT

public static final byte TC_OBJECT

Enabled: new Object.

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TC_STRING

public static final byte TC_STRING

Enabled: new String.

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TC_ARRAY

public static final byte TC_ARRAY

Enabled: new Array.

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TC_CLASS

public static final byte TC_CLASS

Enabled: Reference to Class.

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TC_BLOCKDATA

public static final byte TC_BLOCKDATA

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

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TC_ENDBLOCKDATA

public static final byte TC_ENDBLOCKDATA

Enabled: End of optional block data blocks for an object.

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TC_RESET

public static final byte TC_RESET

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

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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.

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TC_EXCEPTION

public static final byte TC_EXCEPTION

Enabled: Exception during write.

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TC_LONGSTRING

public static final byte TC_LONGSTRING

Enabled: Long string.

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TC_PROXYCLASSDESC

public static final byte TC_PROXYCLASSDESC

Enabled: new Proxy Class Descriptor.

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TC_MAX

public static final byte TC_MAX

Enabled: Last tag value.

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baseWireHandle

public static final int baseWireHandle

Enabled: First wire handle to be assigned.

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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.

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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

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SC_SERIALIZABLE

public static final byte SC_SERIALIZABLE

Enabled: Bit mask for ObjectStreamClass flag. Indicates class is Serializable.

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SC_EXTERNALIZABLE

public static final byte SC_EXTERNALIZABLE

Enabled: Bit mask for ObjectStreamClass flag. Indicates class is Externalizable.

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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)

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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()

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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)

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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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