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

Class NumberVersionStrategy

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

All Implemented Interfaces:

Serializable, Strategy, VersionStrategy

Direct Known Subclasses:

MultiColumnVersionStrategy

public class NumberVersionStrategy
extends ColumnVersionStrategy

Uses a version number for optimistic versioning.

Author:

Abe White

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
NumberVersionStrategy()

Method Summary

Modifier and Type	Method	Description
String	getAlias()	Return the alias of this strategy.
Map<Column,String>	getBulkUpdateValues()
int	getInitialValue()	Return the initial value for version column.
protected int	getJavaType()	Return the code from JavaTypes for the version values this strategy uses.
protected Object	nextVersion(Object version)	Return the next version given the current one, which may be null.
void	setInitialValue(int initial)	Set the initial value for version column.

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

checkVersion, compare, compare, compareVersion, delete, getJavaType, 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, initialize, 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, initialize, isCustomDelete, isCustomInsert, isCustomUpdate

Field Details

ALIAS

public static final String ALIAS

See Also:

• Constant Field Values

Constructor Details

NumberVersionStrategy

public NumberVersionStrategy()

Method Details

setInitialValue

public void setInitialValue(int initial)

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

getInitialValue

public int getInitialValue()

Return the initial value for version column. Defaults to 1.

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 AbstractStrategy

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.

Specified by:

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.

Specified by:

nextVersion in class ColumnVersionStrategy

getBulkUpdateValues

public Map<Column,String> getBulkUpdateValues()

Specified by:

getBulkUpdateValues in interface VersionStrategy

Overrides:

getBulkUpdateValues in class AbstractVersionStrategy

Returns:

a Map<Column,Object> specifying how to update each version column during a bulk update.