org.datanucleus.store.rdbms.scostore

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

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

Method Summary

Modifier and Type	Method and Description
boolean	contains(org.datanucleus.state.ObjectProvider op, Object element) Method to verify if the specified element is contained in this collection.
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.ObjectProvider op, Collection coll) Method to update the collection to be the supplied collection of elements.
boolean	updateEmbeddedElement(org.datanucleus.state.ObjectProvider op, E element, int fieldNumber, Object value) Method to update a field of an embedded element.
boolean	updateEmbeddedElement(org.datanucleus.state.ObjectProvider op, E element, int fieldNumber, Object value, JavaTypeMapping fieldMapping)

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, iterator, 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, hasOrderMapping, iterator, remove, removeAll, size

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

getOwnerMemberMetaData, getStoreManager

Field Detail

containsStmt

protected String containsStmt

Constructor Detail

AbstractCollectionStore

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

Constructor.

Parameters:

storeMgr - Manager for the store

clr - ClassLoader resolver

Method Detail

updateEmbeddedElement

public boolean updateEmbeddedElement(org.datanucleus.state.ObjectProvider op,
                                     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:

op - ObjectProvider 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

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.types.scostore.CollectionStore<E>

Parameters:

op - ObjectProvider of the object

coll - The collection to use

contains

public boolean contains(org.datanucleus.state.ObjectProvider op,
                        Object element)

Method to verify if the specified element is contained in this collection.

Specified by:

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

Parameters:

op - ObjectProvider

element - The element

Returns:

Whether it contains the element

updateEmbeddedElement

public boolean updateEmbeddedElement(org.datanucleus.state.ObjectProvider op,
                                     E element,
                                     int fieldNumber,
                                     Object value,
                                     JavaTypeMapping fieldMapping)

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

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.