Skip navigation links

oracle.toplink.sequencing
Class StandardSequence

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

All Implemented Interfaces:

java.lang.Cloneable, java.io.Serializable

Direct Known Subclasses:

QuerySequence

public abstract class StandardSequence

extends Sequence

Purpose: An abstract class providing default sequence behavior.

See Also:

Serialized Form

Constructor Summary

StandardSequence()

StandardSequence(java.lang.String name)

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

Method Summary

java.lang.Object	getGeneratedValue(Accessor accessor, Session writeSession, java.lang.String seqName) INTERNAL: Return the newly-generated sequencing value.
java.util.Vector	getGeneratedVector(Accessor accessor, Session writeSession, java.lang.String seqName, int size) INTERNAL: Return a Vector of newly-generated sequencing values.
void	onConnect()
void	onDisconnect()
abstract boolean	shouldAcquireValueAfterInsert() INTERNAL: Indicates whether sequencing value should be acquired after INSERT.
abstract boolean	shouldUseTransaction() INTERNAL: Indicates whether TopLink should internally call beginTransaction() before getGeneratedValue/Vector, and commitTransaction after.

Methods inherited from class oracle.toplink.sequencing.Sequence

clone, equalNameAndSize, equals, getDatasourcePlatform, getName, getPreallocationSize, isConnected, setName, setPreallocationSize

Methods inherited from class java.lang.Object

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

Constructor Detail

StandardSequence

public StandardSequence()

StandardSequence

public StandardSequence(java.lang.String name)

StandardSequence

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

Method Detail

onConnect

public void onConnect()

onDisconnect

public void onDisconnect()

shouldAcquireValueAfterInsert

public abstract boolean shouldAcquireValueAfterInsert()

Description copied from class: Sequence

INTERNAL: Indicates whether sequencing value should be acquired after INSERT. Note that preallocation could be used only in case sequencing values should be acquired before insert (this method returns false). In default implementation, it is true for table sequencing and native sequencing on Oracle platform, false for native sequencing on other platforms.

Specified by:

shouldAcquireValueAfterInsert in class Sequence

shouldUseTransaction

public abstract boolean shouldUseTransaction()

Description copied from class: Sequence

INTERNAL: Indicates whether TopLink should internally call beginTransaction() before getGeneratedValue/Vector, and commitTransaction after. In default implementation, it is true for table sequencing and false for native sequencing.

Specified by:

shouldUseTransaction in class Sequence

getGeneratedValue

public java.lang.Object getGeneratedValue(Accessor accessor,
                                          Session writeSession,
                                          java.lang.String seqName)

Description copied from class: Sequence

INTERNAL: Return the newly-generated sequencing value. Used only in case preallocation is not used (shouldUsePreallocation()==false). Accessor may be non-null only in case shouldUseSeparateConnection()==true. Even in this case accessor could be null - if SequencingControl().shouldUseSeparateConnection()==false; Therefore in case shouldUseSeparateConnection()==true, implementation should handle both cases: use a separate connection if provided (accessor != null), or get by without it (accessor == null).

Specified by:

getGeneratedValue in class Sequence

Parameters:

accessor - Accessor is a separate sequencing accessor (may be null);

writeSession - Session is a Session used for writing (either ClientSession or DatabaseSession);

seqName - String is sequencing number field name

getGeneratedVector

public java.util.Vector getGeneratedVector(Accessor accessor,
                                           Session writeSession,
                                           java.lang.String seqName,
                                           int size)

Description copied from class: Sequence

INTERNAL: Return a Vector of newly-generated sequencing values. Used only in case preallocation is used (shouldUsePreallocation()==true). Accessor may be non-null only in case shouldUseSeparateConnection()==true. Even in this case accessor could be null - if SequencingControl().shouldUseSeparateConnection()==false; Therefore in case shouldUseSeparateConnection()==true, implementation should handle both cases: use a separate connection if provided (accessor != null), or get by without it (accessor == null).

Specified by:

getGeneratedVector in class Sequence

Parameters:

accessor - Accessor is a separate sequencing accessor (may be null);

writeSession - Session is a Session used for writing (either ClientSession or DatabaseSession);

seqName - String is sequencing number field name

size - int number of values to preallocate (output Vector size).

Skip navigation links