Class AbstractCollectionStore<E>

java.lang.Object

org.datanucleus.store.rdbms.scostore.BaseContainerStore

org.datanucleus.store.rdbms.scostore.ElementContainerStore

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

All Implemented Interfaces:

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

Direct Known Subclasses:

AbstractListStore, AbstractSetStore, MapValueCollectionStore

public abstract class AbstractCollectionStore<E>
extends ElementContainerStore
implements org.datanucleus.store.types.scostore.CollectionStore<E>

Abstract representation of a store of a Collection. Contains all common parts of storing Sets and Lists.

Field Summary

Fields

Modifier and Type	Field	Description
protected String	containsStmt

Fields inherited from class ElementContainerStore

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

Fields inherited from class BaseContainerStore

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

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
boolean	contains(org.datanucleus.state.DNStateManager sm, Object element)
private String	getContainsStatementString(Object element)
private String	getContainsStmt(Object element)	Generate statement for retrieving the contents of the Collection.
private String	getRemoveStatementString(Object element)
protected String	getRemoveStmt(Object element)	Generate statement for removing an element from the Collection.
protected String	getUpdateEmbeddedElementStmt(JavaTypeMapping fieldMapping)	Generate statement for update the field of an embedded element.
void	update(org.datanucleus.state.DNStateManager sm, Collection<? extends E> coll)
boolean	updateEmbeddedElement(org.datanucleus.state.DNStateManager sm, E element, int fieldNumber, Object value)	Method to update a field of an embedded element.

Methods inherited from class ElementContainerStore

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

Methods inherited from class BaseContainerStore

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

Methods inherited from class 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, hasOrderMapping, iterator, remove, removeAll, size

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

getOwnerMemberMetaData, getStoreManager

Field Details

containsStmt

protected String containsStmt

Constructor Details

AbstractCollectionStore

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

Constructor.

Parameters:

storeMgr - Manager for the store

clr - ClassLoader resolver

Method Details

update

public void update(org.datanucleus.state.DNStateManager sm,
 Collection<? extends E> coll)

Specified by:

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

contains

public boolean contains(org.datanucleus.state.DNStateManager sm,
 Object element)

Specified by:

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

getContainsStmt

private String getContainsStmt(Object element)

Generate statement for retrieving the contents of the Collection. The discriminator part is only present when the element type has inheritance strategy of "superclass-table" and is Inverse.

SELECT OWNERCOL FROM COLLECTIONTABLE
WHERE OWNERCOL=?
AND ELEMENTCOL=?
[AND DISCRIMINATOR=?]
[AND RELATION_DISCRIM=?]

Returns:

Statement for retrieving the contents of the Collection.

getContainsStatementString

private String getContainsStatementString(Object element)

getRemoveStmt

protected String getRemoveStmt(Object element)

Generate statement for removing an element from the Collection.

DELETE FROM COLLTABLE WHERE OWNERCOL=? AND ELEMENTCOL = ?

Parameters:

element - The element to remove

Returns:

Statement for deleting an item from the Collection.

getRemoveStatementString

private String getRemoveStatementString(Object element)

updateEmbeddedElement

public boolean updateEmbeddedElement(org.datanucleus.state.DNStateManager sm,
 E element,
 int fieldNumber,
 Object value)

Method to update a field of an embedded element.

Specified by:

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

Parameters:

sm - StateManager of the owner

element - The element to update

fieldNumber - The number of the field to update

value - The value

Returns:

true if the datastore was updated

getUpdateEmbeddedElementStmt

protected String getUpdateEmbeddedElementStmt(JavaTypeMapping fieldMapping)

Generate statement for update the field of an embedded element.

UPDATE SETTABLE
SET EMBEDDEDFIELD1 = ?
WHERE OWNERCOL=?
AND ELEMENTCOL = ?

Parameters:

fieldMapping - The mapping for the field within the embedded object to be updated

Returns:

Statement for updating an embedded element in the Set