Package org.datanucleus.store

Class AbstractPersistenceHandler

java.lang.Object

org.datanucleus.store.AbstractPersistenceHandler

All Implemented Interfaces:

StorePersistenceHandler

public abstract class AbstractPersistenceHandler
extends Object
implements StorePersistenceHandler

Abstract representation of a persistence handler, to be extended by datastores own variant.

Nested Class Summary

Nested classes/interfaces inherited from interface org.datanucleus.store.StorePersistenceHandler

StorePersistenceHandler.PersistenceBatchType

Field Summary

Fields

Modifier and Type	Field	Description
protected StoreManager	storeMgr

Constructor Summary

Constructors

Constructor	Description
AbstractPersistenceHandler(StoreManager storeMgr)

Method Summary

Modifier and Type	Method	Description
void	assertReadOnlyForUpdateOfObject(DNStateManager sm)	Convenience method to assert when this StoreManager is read-only and the specified object is attempting to be updated.
Object	findObjectForUnique(ExecutionContext ec, AbstractClassMetaData cmd, String[] memberNames, Object[] values)	Method to find the object with the specified value(s) for the member(s) of the specified type.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.datanucleus.store.StorePersistenceHandler

batchEnd, batchStart, close, deleteObject, deleteObjects, fetchObject, fetchObjects, findObject, findObjects, insertObject, insertObjects, locateObject, locateObjects, updateObject

Field Detail

storeMgr

protected StoreManager storeMgr

Constructor Detail

AbstractPersistenceHandler

public AbstractPersistenceHandler(StoreManager storeMgr)

Method Detail

findObjectForUnique

public Object findObjectForUnique(ExecutionContext ec,
                                  AbstractClassMetaData cmd,
                                  String[] memberNames,
                                  Object[] values)

Description copied from interface: StorePersistenceHandler

Method to find the object with the specified value(s) for the member(s) of the specified type.

Specified by:

findObjectForUnique in interface StorePersistenceHandler

Parameters:

ec - ExecutionContext

cmd - Metadata for the class in question

memberNames - Member(s) that define the object

values - Value(s) for the member(s)

Returns:

The object with these member value(s)

assertReadOnlyForUpdateOfObject

public void assertReadOnlyForUpdateOfObject(DNStateManager sm)

Convenience method to assert when this StoreManager is read-only and the specified object is attempting to be updated.

Parameters:

sm - StateManager for the object