org.datanucleus.store.rdbms.scostore

Class JoinArrayStore<E>

java.lang.Object

org.datanucleus.store.rdbms.scostore.BaseContainerStore

org.datanucleus.store.rdbms.scostore.ElementContainerStore

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

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

All Implemented Interfaces:

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

public class JoinArrayStore<E>
extends AbstractArrayStore<E>

RDBMS-specific implementation of a Join ArrayStore

Field Summary

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

Constructor and Description
JoinArrayStore(org.datanucleus.metadata.AbstractMemberMetaData mmd, ArrayTable arrayTable, org.datanucleus.ClassLoaderResolver clr) Constructor for an RDBMS implementation of a join array store.

Method Summary

Modifier and Type	Method and Description
ElementIteratorStatement	getIteratorStatement(org.datanucleus.ExecutionContext ec, org.datanucleus.FetchPlan fp, boolean addRestrictionOnOwner) Method to return the SQLStatement and mapping for an iterator for this backing store.
Iterator<E>	iterator(org.datanucleus.state.ObjectProvider ownerOP) Method to return an iterator to the array.

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

add, clear, clearInternal, getArray, internalAdd, processBatchedWrites, set

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

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.ArrayStore

size

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

getOwnerMemberMetaData, getStoreManager

Constructor Detail

JoinArrayStore

public JoinArrayStore(org.datanucleus.metadata.AbstractMemberMetaData mmd,
                      ArrayTable arrayTable,
                      org.datanucleus.ClassLoaderResolver clr)

Constructor for an RDBMS implementation of a join array store.

Parameters:

mmd - Metadata for the owning field/property

arrayTable - The Join table

clr - ClassLoader resolver

Method Detail

iterator

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

Method to return an iterator to the array.

Specified by:

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

Specified by:

iterator in class AbstractArrayStore<E>

Parameters:

ownerOP - ObjectProvider for the owner of the array

Returns:

The Iterator

getIteratorStatement

public ElementIteratorStatement getIteratorStatement(org.datanucleus.ExecutionContext ec,
                                                     org.datanucleus.FetchPlan fp,
                                                     boolean addRestrictionOnOwner)

Method to return the SQLStatement and mapping for an iterator for this backing store. Create a statement of the form

 SELECT ELEM_COLS
 FROM JOIN_TBL
   [JOIN ELEM_TBL ON ELEM_TBL.ID = JOIN_TBL.ELEM_ID]
 [WHERE]
   [JOIN_TBL.OWNER_ID = {value}] [AND]
   [JOIN_TBL.DISCRIM = {discrimValue}]
 [ORDER BY {orderClause}]
 

Parameters:

ec - ExecutionContext

fp - FetchPlan to use in determing 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