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oracle.toplink.sequencing
Class Sequence

java.lang.Object
oracle.toplink.sequencing.Sequence

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

Direct Known Subclasses:

DefaultSequence, StandardSequence

public abstract class Sequence

extends java.lang.Object

implements java.io.Serializable, java.lang.Cloneable

Purpose: Define an interface for sequencing customization.

Description: Customary sequencing behavior could be achieved by implementing this interface and passing the instance to DatabaseSession.getSequencingControl().setValueGenerationPolicy(..). TopLink internally uses the same method to set its default implementation of this interface, which provides native sequencing and table sequencing. Note that the following methods: shouldAcquireValueAfterInsert(); shouldUsePreallocation(); shouldUseSeparateConnection(); shouldUseTransaction(); are called only once - during creation of the sequencing object. Therefore during the lifetime of sequencing object these methods should return the same values as when called for the first time. If this is not true - resetSequencing (call SequencingControl.resetSequencing()).

Responsibilities:

• Define the APIs for customary sequencing.

See Also:

SequencingControl, Serialized Form

Constructor Summary

Sequence()

Sequence(java.lang.String name)

Sequence(java.lang.String name, int size)

Method Summary

java.lang.Object	clone()
static boolean	equalNameAndSize(Sequence seq1, Sequence seq2)
boolean	equals(java.lang.Object obj)
Platform	getDatasourcePlatform()
java.lang.String	getName()
int	getPreallocationSize()
boolean	isConnected() PUBLIC: Indicates that Sequence is connected.
void	setName(java.lang.String name)
void	setPreallocationSize(int size)

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Sequence

public Sequence()

Sequence

public Sequence(java.lang.String name)

Sequence

public Sequence(java.lang.String name,
                int size)

Method Detail

getName

public java.lang.String getName()

setName

public void setName(java.lang.String name)

getPreallocationSize

public int getPreallocationSize()

setPreallocationSize

public void setPreallocationSize(int size)

clone

public java.lang.Object clone()

equals

public boolean equals(java.lang.Object obj)

equalNameAndSize

public static boolean equalNameAndSize(Sequence seq1,
                                       Sequence seq2)

getDatasourcePlatform

public Platform getDatasourcePlatform()

isConnected

public boolean isConnected()

PUBLIC: Indicates that Sequence is connected.

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