org.datanucleus.store.scostore

Interface CollectionStore

All Superinterfaces:

Store

All Known Subinterfaces:

ListStore, SetStore

public interface CollectionStore
extends Store

Interface representation of the backing store for a Collection.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	add(ObjectProvider op, Object element, int size) Method to add an element to the collection.
boolean	addAll(ObjectProvider op, Collection elements, int size) Method to add a collection of elements to the collection.
void	clear(ObjectProvider op) Method to clear the collection.
boolean	contains(ObjectProvider op, Object element) Method to check if an element exists in the collection.
boolean	hasOrderMapping() Accessor for whether the store utilises an order mapping.
Iterator	iterator(ObjectProvider op) Accessor for an iterator for the collection.
boolean	remove(ObjectProvider op, Object element, int size, boolean allowDependentField) Method to remove an element from the collection.
boolean	removeAll(ObjectProvider op, Collection elements, int size) Method to remove a collection of elements from the collection.
int	size(ObjectProvider op) Accessor for the size of the collection.
void	update(ObjectProvider op, Collection coll) Method to update the collection to be the supplied collection of elements.
boolean	updateEmbeddedElement(ObjectProvider op, Object element, int fieldNumber, Object value) Method to update en embedded element in the collection.

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

getOwnerMemberMetaData, getStoreManager

Method Detail

hasOrderMapping

boolean hasOrderMapping()

Accessor for whether the store utilises an order mapping. An order mapping is used to allow for ordering of elements or to allow duplicates.

Returns:

Whether it uses an order mapping.

updateEmbeddedElement

boolean updateEmbeddedElement(ObjectProvider op,
                            Object element,
                            int fieldNumber,
                            Object value)

Method to update en embedded element in the collection.

Parameters:

op - ObjectProvider for the owner of the collection

element - The element

fieldNumber - Field to update in the element

value - The new value for the field

Returns:

Whether the element was modified

iterator

Iterator iterator(ObjectProvider op)

Accessor for an iterator for the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

Returns:

Iterator for the collection.

size

int size(ObjectProvider op)

Accessor for the size of the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

Returns:

The size of the collection.

contains

boolean contains(ObjectProvider op,
               Object element)

Method to check if an element exists in the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

element - Element to check

Returns:

Whether the element exists in the collection.

add

boolean add(ObjectProvider op,
          Object element,
          int size)

Method to add an element to the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

element - Element to add

size - Current size of the collection if known. -1 if not known

Returns:

Whether the element was added ok

addAll

boolean addAll(ObjectProvider op,
             Collection elements,
             int size)

Method to add a collection of elements to the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

elements - Elements to add

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

Returns:

Whether the elements were added ok

remove

boolean remove(ObjectProvider op,
             Object element,
             int size,
             boolean allowDependentField)

Method to remove an element from the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

element - Element to remove

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

allowDependentField - Whether to allow any cascading delete actions to be fired from this removal

Returns:

Whether the element was removed ok

removeAll

boolean removeAll(ObjectProvider op,
                Collection elements,
                int size)

Method to remove a collection of elements from the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

elements - Element to remove

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

Returns:

Whether the elements were removed ok

clear

void clear(ObjectProvider op)

Method to clear the collection.

Parameters:

op - ObjectProvider for the owner of the collection.

update

void update(ObjectProvider op,
          Collection coll)

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

Parameters:

op - ObjectProvider of the object

coll - The collection to use