org.datanucleus.store.rdbms.scostore

Class AbstractSetStore<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>

All Implemented Interfaces:

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

Direct Known Subclasses:

FKSetStore, JoinSetStore

public abstract class AbstractSetStore<E>
extends AbstractCollectionStore<E>
implements org.datanucleus.store.types.scostore.SetStore<E>

Abstract representation of the backing store for a Set/Collection. Can be used for a join table set, or a map key set.

Field Summary

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

containsStmt

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

addStmt, clearStmt, containerTable, elementCmd, elementInfo, elementIsPersistentInterface, elementMapping, elementsAreEmbedded, elementsAreSerialised, elementType, 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

Modifier	Constructor and Description
protected	AbstractSetStore(RDBMSStoreManager storeMgr, org.datanucleus.ClassLoaderResolver clr) Constructor.

Method Summary

Modifier and Type	Method and Description
abstract Iterator<E>	iterator(org.datanucleus.state.ObjectProvider op) Accessor for an iterator for the set.
boolean	remove(org.datanucleus.state.ObjectProvider op, Object element, int size, boolean allowDependentField) Removes the association to one element
boolean	removeAll(org.datanucleus.state.ObjectProvider op, Collection elements, int size) Remove all elements from a collection from the association owner vs elements.

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

contains, getRemoveStmt, getUpdateEmbeddedElementStmt, update, updateEmbeddedElement, updateEmbeddedElement

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

clear, getAddStmtForJoinTable, getClearStmt, getComponentInfoForElement, getContainerTable, getElementClassMetaData, getElementMapping, getRelationDiscriminatorMapping, getRelationDiscriminatorValue, getSize, getSizeStmt, hasOrderMapping, invalidateAddStmt, isElementsAreEmbedded, isElementsAreSerialised, size, usingJoinTable, validateElementForReading, validateElementForWriting, validateElementType

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

allowsBatching, getComponentInformationForClass, 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.types.scostore.CollectionStore

add, addAll, clear, contains, hasOrderMapping, size, update, updateEmbeddedElement

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

getOwnerMemberMetaData, getStoreManager

Constructor Detail

AbstractSetStore

protected AbstractSetStore(RDBMSStoreManager storeMgr,
                           org.datanucleus.ClassLoaderResolver clr)

Constructor.

Parameters:

storeMgr - Manager for the store

clr - The ClassLoaderResolver

Method Detail

iterator

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

Accessor for an iterator for the set. Implemented by the subclass using whatever mechanism the underlying datastore provides.

Specified by:

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

Specified by:

iterator in class ElementContainerStore

Parameters:

op - ObjectProvider for the set.

Returns:

Iterator for the set.

remove

public boolean remove(org.datanucleus.state.ObjectProvider op,
                      Object element,
                      int size,
                      boolean allowDependentField)

Removes the association to one element

Specified by:

remove in interface org.datanucleus.store.types.scostore.CollectionStore<E>

Parameters:

op - ObjectProvider for the container

element - Element to remove

size - Current size

allowDependentField - Whether to allow any cascade deletes caused by this removal

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. This implementation iterates around the remove() method doing each element 1 at a time. Please refer to the JoinSetStore and FKSetStore for the variations used there. This is used for Map key and value stores.

Specified by:

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

Parameters:

op - ObjectProvider for the container

elements - Collection of elements to remove

Returns:

Whether the database was updated