ObjectStreamConstants
| java.io.ObjectStreamConstants |
 Known Indirect Subclasses
|
Class Overview
Constants written into the Object Serialization Stream.
Summary
| Constants | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| int | PROTOCOL_VERSION_1 | A Stream Protocol Version. | |||||||||
| int | PROTOCOL_VERSION_2 | A Stream Protocol Version. | |||||||||
| byte | SC_BLOCK_DATA | Bit mask for ObjectStreamClass flag. | |||||||||
| byte | SC_ENUM | Bit mask for ObjectStreamClass flag. | |||||||||
| byte | SC_EXTERNALIZABLE | Bit mask for ObjectStreamClass flag. | |||||||||
| byte | SC_SERIALIZABLE | Bit mask for ObjectStreamClass flag. | |||||||||
| byte | SC_WRITE_METHOD | Bit mask for ObjectStreamClass flag. | |||||||||
| short | STREAM_MAGIC | Magic number that is written to the stream header. | |||||||||
| short | STREAM_VERSION | Version number that is written to the stream header. | |||||||||
| byte | TC_ARRAY | new Array. | |||||||||
| byte | TC_BASE | First tag value. | |||||||||
| byte | TC_BLOCKDATA | Block of optional data. | |||||||||
| byte | TC_BLOCKDATALONG | long Block data. | |||||||||
| byte | TC_CLASS | Reference to Class. | |||||||||
| byte | TC_CLASSDESC | new Class Descriptor. | |||||||||
| byte | TC_ENDBLOCKDATA | End of optional block data blocks for an object. | |||||||||
| byte | TC_ENUM | new Enum constant. | |||||||||
| byte | TC_EXCEPTION | Exception during write. | |||||||||
| byte | TC_LONGSTRING | Long string. | |||||||||
| byte | TC_MAX | Last tag value. | |||||||||
| byte | TC_NULL | Null object reference. | |||||||||
| byte | TC_OBJECT | new Object. | |||||||||
| byte | TC_PROXYCLASSDESC | new Proxy Class Descriptor. | |||||||||
| byte | TC_REFERENCE | Reference to an object already written into the stream. | |||||||||
| byte | TC_RESET | Reset stream context. | |||||||||
| byte | TC_STRING | new String. | |||||||||
| int | baseWireHandle | First wire handle to be assigned. | |||||||||
| Fields | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| SUBCLASS_IMPLEMENTATION_PERMISSION | Enable overriding of readObject and writeObject. | ||||||||||
| SUBSTITUTION_PERMISSION | Enable substitution of one object for another during serialization/deserialization. | ||||||||||
Constants
public 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.
See Also
public 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 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.
See Also
public static final byte SC_BLOCK_DATA
Bit mask for ObjectStreamClass flag. Indicates Externalizable data written in Block Data mode. Added for PROTOCOL_VERSION_2.
See Also
public static final byte SC_ENUM
Bit mask for ObjectStreamClass flag. Indicates class is an enum type.
public static final byte SC_EXTERNALIZABLE
Bit mask for ObjectStreamClass flag. Indicates class is Externalizable.
public static final byte SC_SERIALIZABLE
Bit mask for ObjectStreamClass flag. Indicates class is Serializable.
public static final byte SC_WRITE_METHOD
Bit mask for ObjectStreamClass flag. Indicates a Serializable class defines its own writeObject method.
public static final short STREAM_MAGIC
Magic number that is written to the stream header.
public static final short STREAM_VERSION
Version number that is written to the stream header.
public static final byte TC_ARRAY
new Array.
public static final byte TC_BASE
First tag value.
public static final byte TC_BLOCKDATA
Block of optional data. Byte following tag indicates number of bytes in this block data.
public static final byte TC_BLOCKDATALONG
long Block data. The long following the tag indicates the number of bytes in this block data.
public static final byte TC_CLASS
Reference to Class.
public static final byte TC_CLASSDESC
new Class Descriptor.
public static final byte TC_ENDBLOCKDATA
End of optional block data blocks for an object.
public static final byte TC_ENUM
new Enum constant.
public static final byte TC_EXCEPTION
Exception during write.
public static final byte TC_LONGSTRING
Long string.
public static final byte TC_MAX
Last tag value.
public static final byte TC_NULL
Null object reference.
public static final byte TC_OBJECT
new Object.
public static final byte TC_PROXYCLASSDESC
new Proxy Class Descriptor.
public static final byte TC_REFERENCE
Reference to an object already written into the stream.
public static final byte TC_RESET
Reset stream context. All handles written into stream are reset.
public static final byte TC_STRING
new String.
public static final int baseWireHandle
First wire handle to be assigned.
Fields
public static final SerializablePermission SUBCLASS_IMPLEMENTATION_PERMISSION
Enable overriding of readObject and writeObject.
public static final SerializablePermission SUBSTITUTION_PERMISSION
Enable substitution of one object for another during serialization/deserialization.