UUID

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org.apache.derby.catalog
Interface UUID

All Superinterfaces:: java.io.Externalizable, java.io.Serializable

public interface UUID
extends java.io.Externalizable

An interface for accessing Cloudscape 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

public 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

public java.lang.String toANSIidentifier()

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

toByteArray

public byte[] toByteArray()

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

cloneMe

public UUID cloneMe()

Clone this UUID.

toHexString

public java.lang.String toHexString()

Create a hex string representation of this UUID.