org.datanucleus.store.rdbms.scostore
Class RDBMSFKSetStore

java.lang.Object
  org.datanucleus.store.mapped.scostore.BaseContainerStore
      org.datanucleus.store.mapped.scostore.ElementContainerStore
          org.datanucleus.store.mapped.scostore.AbstractCollectionStore
              org.datanucleus.store.mapped.scostore.AbstractSetStore
                  org.datanucleus.store.mapped.scostore.FKSetStore
                      org.datanucleus.store.rdbms.scostore.RDBMSFKSetStore

All Implemented Interfaces:

org.datanucleus.store.mapped.expression.CollectionStoreQueryable, org.datanucleus.store.scostore.CollectionStore, org.datanucleus.store.scostore.SetStore, org.datanucleus.store.scostore.Store

public class RDBMSFKSetStore
extends org.datanucleus.store.mapped.scostore.FKSetStore

RDBMS-specific implementation of an FKSetStore.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.mapped.scostore.ElementContainerStore

org.datanucleus.store.mapped.scostore.ElementContainerStore.ElementInfo

Field Summary

Fields inherited from class org.datanucleus.store.mapped.scostore.ElementContainerStore

clr, containerTable, elementInfo, elementIsPersistentInterface, elementMapping, elementsAreEmbedded, elementsAreSerialised, elementType, emd, iterateUsingDiscriminator, orderMapping, relationDiscriminatorMapping, relationDiscriminatorValue, specialization

Fields inherited from class org.datanucleus.store.mapped.scostore.BaseContainerStore

allowsNull, dba, LOCALISER, ownerMapping, ownerMemberMetaData, relationType, storeMgr

Constructor Summary

RDBMSFKSetStore(org.datanucleus.metadata.AbstractMemberMetaData mmd, RDBMSManager storeMgr, org.datanucleus.ClassLoaderResolver clr)
Constructor for the backing store of a FK set for RDBMS.

Method Summary

protected void	clearInternal(org.datanucleus.StateManager ownerSM, org.datanucleus.ObjectManager om)
protected java.lang.String	getClearNullifyStmt() Generates the statement for clearing items by nulling the owner link out.
protected SQLStatement	getSQLStatementForIterator(org.datanucleus.StateManager ownerSM) Method to generate an SQLStatement for iterating through elements of the set.
java.util.Iterator	iterator(org.datanucleus.StateManager ownerSM) Accessor for an iterator for the set.
protected boolean	updateElementFkInternal(org.datanucleus.StateManager sm, java.lang.Object element, java.lang.Object owner)

Methods inherited from class org.datanucleus.store.mapped.scostore.FKSetStore

add, addAll, checkRemovalOfElementShouldDelete, clear, getFieldNumberInElementForBidirectional, joinElementsTo, manageRemovalOfElement, remove, removeAll, update

Methods inherited from class org.datanucleus.store.mapped.scostore.AbstractCollectionStore

contains, getExistsSubquery, getSizeSubquery, updateEmbeddedElement

Methods inherited from class org.datanucleus.store.mapped.scostore.ElementContainerStore

getContainerTable, getElementInfo, getElementInformationForClass, getElementMapping, getElementType, getEmd, getOrderMapping, getRelationDiscriminatorMapping, getRelationDiscriminatorValue, hasOrderMapping, isElementsAreEmbedded, isElementsAreSerialised, size, validateElementForReading, validateElementForWriting, validateElementType

Methods inherited from class org.datanucleus.store.mapped.scostore.BaseContainerStore

allowsBatching, getDatastoreAdapter, getOwnerMapping, getOwnerMemberMetaData, getRelationType, getStateManagerForEmbeddedPCObject, isEmbeddedMapping, setOwner

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.scostore.CollectionStore

contains, getElementType, hasOrderMapping, size, updateEmbeddedElement

Methods inherited from interface org.datanucleus.store.scostore.Store

getStoreManager

Constructor Detail

RDBMSFKSetStore

public RDBMSFKSetStore(org.datanucleus.metadata.AbstractMemberMetaData mmd,
                       RDBMSManager storeMgr,
                       org.datanucleus.ClassLoaderResolver clr)

Constructor for the backing store of a FK set for RDBMS.

Parameters:

mmd - The MetaData for the field that this represents

storeMgr - The MappedStoreManager managing the associated datastore.

clr - The ClassLoaderResolver

Method Detail

clearInternal

protected void clearInternal(org.datanucleus.StateManager ownerSM,
                             org.datanucleus.ObjectManager om)

Specified by:

clearInternal in class org.datanucleus.store.mapped.scostore.FKSetStore

getClearNullifyStmt

protected java.lang.String getClearNullifyStmt()

Generates the statement for clearing items by nulling the owner link out. The statement will be

 UPDATE LISTTABLE SET OWNERCOL=NULL [,DISTINGUISHER=NULL]
 WHERE OWNERCOL=?
 

when there is only one element table, and will be

 UPDATE ? SET OWNERCOL=NULL [,DISTINGUISHER=NULL]
 WHERE OWNERCOL=?
 

when there is more than 1 element table.

Returns:

The Statement for clearing items for the owner.

updateElementFkInternal

protected boolean updateElementFkInternal(org.datanucleus.StateManager sm,
                                          java.lang.Object element,
                                          java.lang.Object owner)

Specified by:

updateElementFkInternal in class org.datanucleus.store.mapped.scostore.FKSetStore

iterator

public java.util.Iterator iterator(org.datanucleus.StateManager ownerSM)

Accessor for an iterator for the set.

Specified by:

iterator in interface org.datanucleus.store.scostore.CollectionStore

Specified by:

iterator in class org.datanucleus.store.mapped.scostore.AbstractSetStore

Parameters:

ownerSM - State Manager for the set.

Returns:

Iterator for the set.

getSQLStatementForIterator

protected SQLStatement getSQLStatementForIterator(org.datanucleus.StateManager ownerSM)

Method to generate an SQLStatement for iterating through elements of the set. Selects the element table. Populates the iteratorMappingDef and iteratorMappingParams.

Parameters:

ownerSM - StateManager for the owner object

Returns:

The SQLStatement