org.datanucleus.store.rdbms.scostore

Class JoinSetStore<E>

java.lang.Object

org.datanucleus.store.rdbms.scostore.BaseContainerStore

org.datanucleus.store.rdbms.scostore.ElementContainerStore

org.datanucleus.store.rdbms.scostore.AbstractCollectionStore<E>

org.datanucleus.store.rdbms.scostore.AbstractSetStore<E>

org.datanucleus.store.rdbms.scostore.JoinSetStore<E>

All Implemented Interfaces:

org.datanucleus.store.scostore.CollectionStore<E>, org.datanucleus.store.scostore.SetStore<E>, org.datanucleus.store.scostore.Store

public class JoinSetStore<E>
extends AbstractSetStore<E>

RDBMS-specific implementation of a SetStore using join table.

Nested Class Summary

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

ElementContainerStore.ElementInfo

Field Summary

Fields

Modifier and Type	Field and Description
protected String	locateStmt Statement to check the existence of an owner-element relation.
protected String	maxOrderColumnIdStmt Statement to get the maximum order column id so we can set the next insert value.

Fields inherited from class org.datanucleus.store.rdbms.scostore.AbstractCollectionStore

containsStmt

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

addStmt, clearStmt, containerTable, elementInfo, elementIsPersistentInterface, elementMapping, elementsAreEmbedded, elementsAreSerialised, elementType, emd, iterateUsingDiscriminator, orderMapping, relationDiscriminatorMapping, relationDiscriminatorValue, removeStmt, sizeStmt

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

allowNulls, clr, dba, ownerMapping, ownerMemberMetaData, relationType, storeMgr

Constructor Summary

Constructors

Constructor and Description
JoinSetStore(org.datanucleus.metadata.AbstractMemberMetaData mmd, CollectionTable joinTable, org.datanucleus.ClassLoaderResolver clr) Constructor for a join set store for RDBMS.

Method Summary

Modifier and Type	Method and Description
boolean	add(org.datanucleus.state.ObjectProvider op, E element, int size) Adds one element to the association owner vs elements.
boolean	addAll(org.datanucleus.state.ObjectProvider op, Collection<E> elements, int size) Adds all elements from a collection to the association container.
protected int[]	doInternalAdd(org.datanucleus.state.ObjectProvider op, E element, org.datanucleus.store.connection.ManagedConnection conn, boolean batched, int orderId, boolean executeNow)
IteratorStatement	getIteratorStatement(org.datanucleus.ClassLoaderResolver clr, org.datanucleus.FetchPlan fp, boolean addRestrictionOnOwner) Method to return the SQLStatement and mapping for an iterator for this backing store.
protected int	getNextIDForOrderColumn(org.datanucleus.state.ObjectProvider op)
protected String	getRemoveAllStmt(org.datanucleus.state.ObjectProvider op, Collection elements) Generate statement for removing a collection of items from the Set.
protected String	getRemoveStmt(Object element) Generate statement for deleting items from the Set.
Iterator<E>	iterator(org.datanucleus.state.ObjectProvider ownerOP) Accessor for an iterator for the set.
boolean	removeAll(org.datanucleus.state.ObjectProvider op, Collection elements, int size) Remove all elements from a collection from the association owner vs elements.
protected boolean	removeAllInternal(org.datanucleus.state.ObjectProvider op, Collection elements, int size)
void	update(org.datanucleus.state.ObjectProvider op, Collection coll) Method to update the collection to be the supplied collection of elements.

Methods inherited from class org.datanucleus.store.rdbms.scostore.AbstractSetStore

remove

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

contains, getUpdateEmbeddedElementStmt, updateEmbeddedElement, updateEmbeddedElement

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

clear, getAddStmtForJoinTable, getClearStmt, getContainerTable, getElementInfoForElement, getElementInformationForClass, getElementMapping, getEmd, getRelationDiscriminatorMapping, getRelationDiscriminatorValue, getSize, getSizeStmt, hasOrderMapping, invalidateAddStmt, isElementsAreEmbedded, isElementsAreSerialised, size, usingJoinTable, validateElementForReading, validateElementForWriting, validateElementType

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

allowsBatching, getDatastoreAdapter, getObjectProviderForEmbeddedPCObject, getOwnerMapping, getOwnerMemberMetaData, getRelationType, getStoreManager, 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

clear, contains, hasOrderMapping, size, updateEmbeddedElement

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

getOwnerMemberMetaData, getStoreManager

Field Detail

locateStmt

protected String locateStmt

Statement to check the existence of an owner-element relation.

maxOrderColumnIdStmt

protected String maxOrderColumnIdStmt

Statement to get the maximum order column id so we can set the next insert value.

Constructor Detail

JoinSetStore

public JoinSetStore(org.datanucleus.metadata.AbstractMemberMetaData mmd,
                    CollectionTable joinTable,
                    org.datanucleus.ClassLoaderResolver clr)

Constructor for a join set store for RDBMS.

Parameters:

mmd - Metadata for the member that has the set with join table

joinTable - The join table

clr - The ClassLoaderResolver

Method Detail

update

public void update(org.datanucleus.state.ObjectProvider op,
                   Collection coll)

Method to update the collection to be the supplied collection of elements.

Specified by:

update in interface org.datanucleus.store.scostore.CollectionStore<E>

Overrides:

update in class AbstractCollectionStore<E>

Parameters:

op - ObjectProvider of the object

coll - The collection to use

add

public boolean add(org.datanucleus.state.ObjectProvider op,
                   E element,
                   int size)

Adds one element to the association owner vs elements.

Parameters:

op - ObjectProvider for the container.

element - Element to add

Returns:

Whether it was successful

addAll

public boolean addAll(org.datanucleus.state.ObjectProvider op,
                      Collection<E> elements,
                      int size)

Adds all elements from a collection to the association container.

Parameters:

op - ObjectProvider for the container.

elements - Collection of elements to add

Returns:

Whether it was successful

removeAll

public boolean removeAll(org.datanucleus.state.ObjectProvider op,
                         Collection elements,
                         int size)

Remove all elements from a collection from the association owner vs elements.

Specified by:

removeAll in interface org.datanucleus.store.scostore.CollectionStore<E>

Overrides:

removeAll in class AbstractSetStore<E>

Parameters:

op - ObjectProvider for the container

elements - Collection of elements to remove

Returns:

Whether the database was updated

removeAllInternal

protected boolean removeAllInternal(org.datanucleus.state.ObjectProvider op,
                                    Collection elements,
                                    int size)

getRemoveStmt

protected String getRemoveStmt(Object element)

Generate statement for deleting items from the Set. The EMBEDDEDFIELDX is only present when the elements are PC(embedded).

 DELETE FROM SETTABLE
 WHERE OWNERCOL=?
 AND ELEMENTCOL = ?
 [AND EMBEDDEDFIELD1 = ? AND EMBEDDEDFIELD2 = ? AND EMBEDDEDFIELD3 = ?]
 [AND RELATION_DISCRIM = ?]
 

Overrides:

getRemoveStmt in class AbstractCollectionStore<E>

Parameters:

element - The element to remove

Returns:

Statement for deleting items from the Set.

getRemoveAllStmt

protected String getRemoveAllStmt(org.datanucleus.state.ObjectProvider op,
                                  Collection elements)

Generate statement for removing a collection of items from the Set.

 DELETE FROM SETTABLE
 WHERE (OWNERCOL=? AND ELEMENTCOL=?) OR
       (OWNERCOL=? AND ELEMENTCOL=?) OR
       (OWNERCOL=? AND ELEMENTCOL=?)
 

Parameters:

op - ObjectProvider for the owner

elements - Collection of elements to remove

Returns:

Statement for deleting items from the Set.

doInternalAdd

protected int[] doInternalAdd(org.datanucleus.state.ObjectProvider op,
                              E element,
                              org.datanucleus.store.connection.ManagedConnection conn,
                              boolean batched,
                              int orderId,
                              boolean executeNow)
                       throws MappedDatastoreException

Throws:

MappedDatastoreException

getNextIDForOrderColumn

protected int getNextIDForOrderColumn(org.datanucleus.state.ObjectProvider op)

iterator

public Iterator<E> iterator(org.datanucleus.state.ObjectProvider ownerOP)

Accessor for an iterator for the set.

Specified by:

iterator in interface org.datanucleus.store.scostore.CollectionStore<E>

Specified by:

iterator in class AbstractSetStore<E>

Parameters:

ownerOP - ObjectProvider for the set.

Returns:

Iterator for the set.

getIteratorStatement

public IteratorStatement getIteratorStatement(org.datanucleus.ClassLoaderResolver clr,
                                              org.datanucleus.FetchPlan fp,
                                              boolean addRestrictionOnOwner)

Method to return the SQLStatement and mapping for an iterator for this backing store.

Parameters:

clr - ClassLoader resolver

fp - FetchPlan to use in determining which fields of element to select

addRestrictionOnOwner - Whether to restrict to a particular owner (otherwise functions as bulk fetch for many owners).

Returns:

The SQLStatement and its associated StatementClassMapping