org.datanucleus.store.rdbms.scostore
Class RDBMSFKListStore

java.lang.Object
  org.datanucleus.store.rdbms.scostore.BaseContainerStore
      org.datanucleus.store.rdbms.scostore.ElementContainerStore
          org.datanucleus.store.rdbms.scostore.AbstractCollectionStore
              org.datanucleus.store.rdbms.scostore.AbstractListStore
                  org.datanucleus.store.rdbms.scostore.RDBMSFKListStore

All Implemented Interfaces:

org.datanucleus.store.scostore.CollectionStore, org.datanucleus.store.scostore.ListStore, org.datanucleus.store.scostore.Store

public class RDBMSFKListStore
extends AbstractListStore

RDBMS-specific implementation of an ListStore using foreign keys.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.rdbms.scostore.ElementContainerStore

ElementContainerStore.ElementInfo

Field Summary

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

indexedList, indexOfStmt, lastIndexOfStmt, removeAtStmt, shiftStmt

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

containsStmt

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

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

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

allowNulls, dba, LOCALISER, ownerMapping, ownerMemberMetaData, relationType, storeMgr

Constructor Summary

RDBMSFKListStore(org.datanucleus.metadata.AbstractMemberMetaData mmd, RDBMSStoreManager storeMgr, org.datanucleus.ClassLoaderResolver clr)

Method Summary

void	clear(org.datanucleus.store.ObjectProvider op) Method to clear the List.
protected SQLStatement	getSQLStatementForIterator(org.datanucleus.store.ObjectProvider ownerSM, int startIdx, int endIdx, org.datanucleus.store.mapped.StatementClassMapping resultMapping, StatementParameterMapping paramMapping) Method to generate an SQLStatement for iterating through elements of the list.
protected boolean	internalAdd(org.datanucleus.store.ObjectProvider op, int startAt, boolean atEnd, Collection c, int size) Internal method for adding an item to the List.
protected boolean	internalRemove(org.datanucleus.store.ObjectProvider op, Object element, int size) Convenience method to remove the specified element from the List.
protected void	internalRemoveAt(org.datanucleus.store.ObjectProvider op, int index, int size) Internal method to remove an object at a location in the List.
protected ListIterator	listIterator(org.datanucleus.store.ObjectProvider ownerSM, int startIdx, int endIdx) Accessor for an iterator through the list elements.
protected void	manageRemovalOfElement(org.datanucleus.store.ObjectProvider ownerSM, Object element) Convenience method to manage the removal of an element from the collection, performing any necessary "managed relationship" updates when the field is bidirectional.
Object	set(org.datanucleus.store.ObjectProvider op, int index, Object element, boolean allowDependentField) Method to set an object in the List at a position.
void	update(org.datanucleus.store.ObjectProvider op, Collection coll) Method to update the collection to be the supplied collection of elements.
protected boolean	validateElementForWriting(org.datanucleus.store.ObjectProvider sm, Object element, int index) Method to validate that an element is valid for writing to the datastore.

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

add, add, addAll, addAll, get, getIndexOfStmt, getIndicesOf, getIndicesOfStmt, getLastIndexOfStmt, getRemoveAtStmt, getShiftStmt, indexOf, internalIndexOf, internalRemoveAt, internalShift, iterator, lastIndexOf, listIterator, remove, remove, removeAll, subList

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

contains, containsInternal, getRemoveStmt, getUpdateEmbeddedElementStmt, internalRemove, updateEmbeddedElement, updateEmbeddedElement

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

executeClear, getAddStmt, getClearStmt, getContainerTable, getElementInfo, getElementInformationForClass, getElementMapping, getEmd, getOrderMapping, getRelationDiscriminatorMapping, getRelationDiscriminatorValue, getSize, getSizeStmt, hasOrderMapping, invalidateAddStmt, isElementsAreEmbedded, isElementsAreSerialised, size, validateElementForReading, validateElementForWriting, validateElementType

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

allowsBatching, getDatastoreAdapter, getOwnerMapping, getOwnerMemberMetaData, getRelationType, getStateManagerForEmbeddedPCObject, 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.scostore.CollectionStore

contains, hasOrderMapping, size, updateEmbeddedElement

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

getStoreManager

Constructor Detail

RDBMSFKListStore

public RDBMSFKListStore(org.datanucleus.metadata.AbstractMemberMetaData mmd,
                        RDBMSStoreManager storeMgr,
                        org.datanucleus.ClassLoaderResolver clr)

Parameters:

mmd - Metadata for owning field/property

storeMgr - Manager for the datastore

clr - ClassLoader resolver

Method Detail

set

public Object set(org.datanucleus.store.ObjectProvider op,
                  int index,
                  Object element,
                  boolean allowDependentField)

Method to set an object in the List at a position.

Parameters:

op - ObjectProvider for the owner

index - The item index

element - What to set it to.

allowDependentField - Whether to enable dependent-field deletes during the set

Returns:

The value before setting.

update

public void update(org.datanucleus.store.ObjectProvider op,
                   Collection coll)

Method to update the collection to be the supplied collection of elements.

Specified by:

update in interface org.datanucleus.store.scostore.CollectionStore

Overrides:

update in class AbstractCollectionStore

Parameters:

op - ObjectProvider for the owner

coll - The collection to use

internalAdd

protected boolean internalAdd(org.datanucleus.store.ObjectProvider op,
                              int startAt,
                              boolean atEnd,
                              Collection c,
                              int size)

Internal method for adding an item to the List.

Specified by:

internalAdd in class AbstractListStore

Parameters:

op - ObjectProvider for the owner

startAt - The start position

atEnd - Whether to add at the end

c - The Collection of elements to add.

size - Current size of list (if known). -1 if not known

Returns:

Whether it was successful

internalRemove

protected boolean internalRemove(org.datanucleus.store.ObjectProvider op,
                                 Object element,
                                 int size)

Convenience method to remove the specified element from the List.

Specified by:

internalRemove in class AbstractListStore

Parameters:

op - ObjectProvider for the owner

element - The element

size - Current size of list if known. -1 if not known

Returns:

Whether the List was modified

manageRemovalOfElement

protected void manageRemovalOfElement(org.datanucleus.store.ObjectProvider ownerSM,
                                      Object element)

Convenience method to manage the removal of an element from the collection, performing any necessary "managed relationship" updates when the field is bidirectional.

Parameters:

ownerSM - StateManager for the collection owner

element - The element

internalRemoveAt

protected void internalRemoveAt(org.datanucleus.store.ObjectProvider op,
                                int index,
                                int size)

Internal method to remove an object at a location in the List. Differs from the JoinTable List in that it nulls out the owner FK.

Specified by:

internalRemoveAt in class AbstractListStore

Parameters:

op - ObjectProvider for the owner

index - The location

size - Current size of list (if known). -1 if not known

clear

public void clear(org.datanucleus.store.ObjectProvider op)

Method to clear the List. This is called by the List.clear() method, or when the container object is being deleted and the elements are to be removed (maybe for dependent field), or also when updating a Collection and removing all existing prior to adding all new.

Specified by:

clear in interface org.datanucleus.store.scostore.CollectionStore

Overrides:

clear in class ElementContainerStore

Parameters:

op - ObjectProvider for the owner

validateElementForWriting

protected boolean validateElementForWriting(org.datanucleus.store.ObjectProvider sm,
                                            Object element,
                                            int index)

Method to validate that an element is valid for writing to the datastore. TODO Minimise differences to super.validateElementForWriting()

Parameters:

sm - StateManager for the List

element - The element to validate

index - The position that the element is being stored at in the list

Returns:

Whether the element was inserted

listIterator

protected ListIterator listIterator(org.datanucleus.store.ObjectProvider ownerSM,
                                    int startIdx,
                                    int endIdx)

Accessor for an iterator through the list elements.

Specified by:

listIterator in class AbstractListStore

Parameters:

ownerSM - State Manager for the container.

startIdx - The start index in the list (only for indexed lists)

endIdx - The end index in the list (only for indexed lists)

Returns:

The List Iterator

getSQLStatementForIterator

protected SQLStatement getSQLStatementForIterator(org.datanucleus.store.ObjectProvider ownerSM,
                                                  int startIdx,
                                                  int endIdx,
                                                  org.datanucleus.store.mapped.StatementClassMapping resultMapping,
                                                  StatementParameterMapping paramMapping)

Method to generate an SQLStatement for iterating through elements of the list. Selects the element table. Populates the resultMapping and paramMapping argument objects.

Parameters:

ownerSM - StateManager for the owner object

startIdx - start index to be retrieved (inclusive). Only for indexed list

endIdx - end index to be retrieved (exclusive). Only for indexed list

resultMapping - Mapping for the candidate result columns

paramMapping - Mapping for the input parameters

Returns:

The SQLStatement