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>

Implementation of a Join ArrayStore

Field Summary

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

Constructor	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	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.DNStateManager ownerSM)	Accessor for an iterator through the array elements.

Methods inherited from class AbstractArrayStore

add, clear, clearInternal, getArray, internalAdd, set

Methods inherited from class ElementContainerStore

getAddStmtForJoinTable, getClearStmt, getComponentInfoForElement, getContainerTable, getElementClassMetaData, getElementMapping, getRelationDiscriminatorMapping, getRelationDiscriminatorValue, getSize, getSizeStmt, hasOrderMapping, invalidateAddStmt, isElementsAreEmbedded, isElementsAreSerialised, 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.ArrayStore

size

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

getOwnerMemberMetaData, getStoreManager

Constructor Details

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 Details

iterator

public Iterator<E> iterator(org.datanucleus.state.DNStateManager ownerSM)

Description copied from class: AbstractArrayStore

Accessor for an iterator through the array elements.

Specified by:

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

Specified by:

iterator in class AbstractArrayStore<E>

Parameters:

ownerSM - StateManager for the container.

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