Package org.apache.openjpa.jdbc.meta.strats

Class MultiColumnVersionStrategy

java.lang.Object

org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

org.apache.openjpa.jdbc.meta.strats.ColumnVersionStrategy

org.apache.openjpa.jdbc.meta.strats.NumberVersionStrategy

org.apache.openjpa.jdbc.meta.strats.MultiColumnVersionStrategy

All Implemented Interfaces:

Serializable, Strategy, VersionStrategy

public class MultiColumnVersionStrategy
extends NumberVersionStrategy

Uses multiple version numbers spanning multiple columns for optimistic versioning.

Since:

1.3.0

Author:

Pinaki Poddar

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ALIAS

Fields inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

vers

Constructor Summary

Constructors

Constructor	Description
MultiColumnVersionStrategy()

Method Summary

Modifier and Type	Method	Description
String	getAlias()	Return the alias of this strategy.
Number[]	getInitialValues()	Return the initial values for version columns.
protected int	getJavaType()	Return the code from JavaTypes for the version values this strategy uses.
protected int	getJavaType(int i)	Return the code from JavaTypes for the version value this given column index uses.
void	initialize()	Perform caching and other initialization operations.
protected Object	nextVersion(Object version)	Return the next version given the current one, which may be null.
void	setInitialValues(Number[] initial)	Set the initial value for version columns.

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.NumberVersionStrategy

getBulkUpdateValues, getInitialValue, setInitialValue

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.ColumnVersionStrategy

checkVersion, compare, compare, compareVersion, delete, insert, load, load, map, select, update

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

afterLoad, setVersion

Methods inherited from class org.apache.openjpa.jdbc.meta.strats.AbstractStrategy

customDelete, customInsert, customUpdate, isCustomDelete, isCustomInsert, isCustomUpdate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.openjpa.jdbc.meta.Strategy

customDelete, customInsert, customUpdate, isCustomDelete, isCustomInsert, isCustomUpdate

Field Details

ALIAS

public static final String ALIAS

See Also:

• Constant Field Values

Constructor Details

MultiColumnVersionStrategy

public MultiColumnVersionStrategy()

Method Details

initialize

public void initialize()

Description copied from interface: Strategy

Perform caching and other initialization operations. This method is called after Strategy.map(boolean), and after all related components have been mapped as well.

Specified by:

initialize in interface Strategy

Overrides:

initialize in class AbstractStrategy

setInitialValues

public void setInitialValues(Number[] initial)

Set the initial value for version columns. Defaults to 1 for each column.

getInitialValues

public Number[] getInitialValues()

Return the initial values for version columns. Defaults to 1 for each column.

getAlias

public String getAlias()

Description copied from interface: Strategy

Return the alias of this strategy. For custom strategies, return the full class name.

Specified by:

getAlias in interface Strategy

Overrides:

getAlias in class NumberVersionStrategy

getJavaType

protected int getJavaType()

Description copied from class: ColumnVersionStrategy

Return the code from JavaTypes for the version values this strategy uses. This method is only used during mapping installation.

Overrides:

getJavaType in class NumberVersionStrategy

getJavaType

protected int getJavaType(int i)

Description copied from class: ColumnVersionStrategy

Return the code from JavaTypes for the version value this given column index uses. Only used if the version strategy employs more than one column.

Overrides:

getJavaType in class ColumnVersionStrategy

nextVersion

protected Object nextVersion(Object version)

Description copied from class: ColumnVersionStrategy

Return the next version given the current one, which may be null.

Overrides:

nextVersion in class NumberVersionStrategy