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

java.lang.Object
  org.apache.openjpa.jdbc.meta.strats.AbstractStrategy
      org.apache.openjpa.jdbc.meta.strats.AbstractVersionStrategy

All Implemented Interfaces:

Strategy, VersionStrategy

Direct Known Subclasses:

ColumnVersionStrategy, NoneVersionStrategy, StateComparisonVersionStrategy, SuperclassVersionStrategy

public abstract class AbstractVersionStrategy
extends AbstractStrategy
implements VersionStrategy

No-op strategy for easy extension.

Author:

Abe White

Field Summary

protected Version

vers The owning version.

Constructor Summary

AbstractVersionStrategy()

Method Summary

void	afterLoad(OpenJPAStateManager sm, JDBCStore store) This method is called after data is loaded into the instance, in case the version indicator works off of a state image.
boolean	checkVersion(OpenJPAStateManager sm, JDBCStore store, boolean updateVersion) Checks the version of the given state manager with the version stored in memory.
int	compareVersion(Object v1, Object v2)
void	load(OpenJPAStateManager sm, JDBCStore store, Result res) Load data.
boolean	select(Select sel, ClassMapping mapping) Select the data for this indicator.
void	setVersion(Version owner) Set the version that uses this strategy.

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

customDelete, customInsert, customUpdate, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, map, update

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, delete, getAlias, initialize, insert, isCustomDelete, isCustomInsert, isCustomUpdate, map, update

Field Detail

vers

protected Version vers

The owning version.

Constructor Detail

AbstractVersionStrategy

public AbstractVersionStrategy()

Method Detail

setVersion

public void setVersion(Version owner)

Description copied from interface: VersionStrategy

Set the version that uses this strategy. This will be called before use.

Specified by:

setVersion in interface VersionStrategy

select

public boolean select(Select sel,
                      ClassMapping mapping)

Description copied from interface: VersionStrategy

Select the data for this indicator.

Specified by:

select in interface VersionStrategy

mapping - the known base class being selected; this may not be the base class in the inheritance hierarchy

Returns:

true if anything was selected; false otherwise

load

public void load(OpenJPAStateManager sm,
                 JDBCStore store,
                 Result res)
          throws SQLException

Description copied from interface: VersionStrategy

Load data.

Specified by:

load in interface VersionStrategy

Throws:

SQLException

afterLoad

public void afterLoad(OpenJPAStateManager sm,
                      JDBCStore store)

Description copied from interface: VersionStrategy

This method is called after data is loaded into the instance, in case the version indicator works off of a state image.

Specified by:

afterLoad in interface VersionStrategy

checkVersion

public boolean checkVersion(OpenJPAStateManager sm,
                            JDBCStore store,
                            boolean updateVersion)
                     throws SQLException

Description copied from interface: VersionStrategy

Checks the version of the given state manager with the version stored in memory.

Specified by:

checkVersion in interface VersionStrategy

Returns:

true if the in-memory version was up-to-date, false otherwise

Throws:

SQLException

compareVersion

public int compareVersion(Object v1,
                          Object v2)

Specified by:

compareVersion in interface VersionStrategy

See Also:

StoreManager.compareVersion(org.apache.openjpa.kernel.OpenJPAStateManager, java.lang.Object, java.lang.Object)