org.apache.derby.impl.services.uuid

Class BasicUUID

java.lang.Object

org.apache.derby.impl.services.uuid.BasicUUID

All Implemented Interfaces:

java.io.Externalizable, java.io.Serializable, UUID, Formatable, TypedFormat

public class BasicUUID
extends java.lang.Object
implements UUID, Formatable

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
private long	majorId
private int	sequence
private long	timemillis

Fields inherited from interface org.apache.derby.catalog.UUID

UUID_BYTE_LENGTH

Constructor Summary

Constructors

Constructor and Description
BasicUUID()
BasicUUID(long majorId, long timemillis, int sequence) Constructor only called by BasicUUIDFactory.
BasicUUID(java.lang.String uuidstring) Constructor only called by BasicUUIDFactory.

Method Summary

Modifier and Type	Method and Description
UUID	cloneMe() Clone this UUID.
boolean	equals(java.lang.Object otherObject) Implement value equality.
int	getTypeFormatId() Return my format identifier.
int	hashCode() Provide a hashCode which is compatible with the equals() method.
void	readExternal(java.io.ObjectInput in) Read this in
private static long	readMSB(java.io.StringReader sr) Read a long value, msb first, from its character representation in the string reader, using '-' or end of string to delimit.
java.lang.String	stringWorkhorse(char separator) Private workhorse of the string making routines.
java.lang.String	toANSIidentifier() Produce a string representation of this UUID which is suitable for use as a unique ANSI identifier.
java.lang.String	toString() Produce a string representation of this UUID which can be passed to UUIDFactory.recreateUUID later on to reconstruct it.
void	writeExternal(java.io.ObjectOutput out) Write this out.
private static void	writeMSB(char[] data, int offset, long value, int nbytes)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

majorId

private long majorId

timemillis

private long timemillis

sequence

private int sequence

Constructor Detail

BasicUUID

public BasicUUID(long majorId,
                 long timemillis,
                 int sequence)

Constructor only called by BasicUUIDFactory.

BasicUUID

public BasicUUID(java.lang.String uuidstring)

Constructor only called by BasicUUIDFactory. Constructs a UUID from the string representation produced by toString.

See Also:

toString()

BasicUUID

public BasicUUID()

Method Detail

writeExternal

public void writeExternal(java.io.ObjectOutput out)
                   throws java.io.IOException

Write this out.

Specified by:

writeExternal in interface java.io.Externalizable

Throws:

java.io.IOException - error writing to log stream

readExternal

public void readExternal(java.io.ObjectInput in)
                  throws java.io.IOException

Read this in

Specified by:

readExternal in interface java.io.Externalizable

Throws:

java.io.IOException - error reading from log stream

getTypeFormatId

public int getTypeFormatId()

Return my format identifier.

Specified by:

getTypeFormatId in interface TypedFormat

Returns:

The identifier. (A UUID stuffed in an array of 16 bytes).

writeMSB

private static void writeMSB(char[] data,
                             int offset,
                             long value,
                             int nbytes)

readMSB

private static long readMSB(java.io.StringReader sr)

Read a long value, msb first, from its character representation in the string reader, using '-' or end of string to delimit.

equals

public boolean equals(java.lang.Object otherObject)

Implement value equality.

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Provide a hashCode which is compatible with the equals() method.

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Produce a string representation of this UUID which can be passed to UUIDFactory.recreateUUID later on to reconstruct it. The funny representation is designed to (sort of) match the format of Microsoft's UUIDGEN utility.

Overrides:

toString in class java.lang.Object

toANSIidentifier

public java.lang.String toANSIidentifier()

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

Specified by:

toANSIidentifier in interface UUID

stringWorkhorse

public java.lang.String stringWorkhorse(char separator)

Private workhorse of the string making routines.

Parameters:

separator - Character to separate number blocks. Null means do not include a separator.

Returns:

string representation of UUID.

cloneMe

public UUID cloneMe()

Clone this UUID.

Specified by:

cloneMe in interface UUID

Returns:

a copy of this UUID