org.apache.derby.catalog
Interface UUID

All Superinterfaces:

java.io.Externalizable, java.io.Serializable

All Known Implementing Classes:

BasicUUID

public interface UUID
extends java.io.Externalizable

An interface for accessing Derby UUIDs, unique identifiers.

The values in the system catalog held in ID columns with a type of CHAR(36) are the string representations of these UUIDs.

A UUID implements equals() and hashCode based on value equality.

Field Summary

static int

UUID_BYTE_LENGTH UUID_BYTE_LENGTH The number of bytes in the array toByteArray returns.

Method Summary

UUID	cloneMe() Clone this UUID.
java.lang.String	toANSIidentifier() Produce a string representation of this UUID which is suitable for use as a unique ANSI identifier.
byte[]	toByteArray() Produce a byte array representation of this UUID which can be passed to UUIDFactory.recreateUUID later on to reconstruct it.
java.lang.String	toHexString() Create a hex string representation of this UUID.

Methods inherited from interface java.io.Externalizable

readExternal, writeExternal

Field Detail

UUID_BYTE_LENGTH

static final int UUID_BYTE_LENGTH

UUID_BYTE_LENGTH The number of bytes in the array toByteArray returns.

See Also:

Constant Field Values

Method Detail

toANSIidentifier

java.lang.String toANSIidentifier()

Produce a string representation of this UUID which is suitable for use as a unique ANSI identifier.

toByteArray

byte[] toByteArray()

Produce a byte array representation of this UUID which can be passed to UUIDFactory.recreateUUID later on to reconstruct it.

cloneMe

UUID cloneMe()

Clone this UUID.

Returns:

a copy of this UUID

toHexString

java.lang.String toHexString()

Create a hex string representation of this UUID.