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

static String

ALIAS

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

vers

Constructor Summary

MultiColumnVersionStrategy()

Method Summary

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.
(package private) Number	nextValue(Object number, int javaTypeCode)
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, getColumnValue, insert, isSecondaryColumn, load, map, populateFromResult, 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 Detail

ALIAS

public static final String ALIAS

See Also:

Constant Field Values

Constructor Detail

MultiColumnVersionStrategy

public MultiColumnVersionStrategy()

Method Detail

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

nextValue

Number nextValue(Object number,
                 int javaTypeCode)