Package ch.tocco.nice2.persist.core.impl.hibernate.pojo.relation

Class ToManyRelationAdapter

java.lang.Object

ch.tocco.nice2.persist.core.api.entity.AbstractEntityList

ch.tocco.nice2.persist.core.impl.hibernate.pojo.relation.AbstractRelationAdapter

ch.tocco.nice2.persist.core.impl.hibernate.pojo.relation.ToManyRelationAdapter

All Implemented Interfaces:

EntityList, Relation, Iterable<Entity>

public class ToManyRelationAdapter
extends AbstractRelationAdapter

Maps a to-many hibernate collection to the Relation interface Note: size() might execute a database query - therefore we do not use size() if we intend to access all entities anyway (toList() or iterator()).

Nested Class Summary

Nested classes/interfaces inherited from class ch.tocco.nice2.persist.core.api.entity.AbstractEntityList

AbstractEntityList.SimpleIterator

Nested classes/interfaces inherited from interface ch.tocco.nice2.persist.core.api.entity.EntityList

EntityList.Filter

Field Summary

Fields inherited from class ch.tocco.nice2.persist.core.impl.hibernate.pojo.relation.AbstractRelationAdapter

entityFacadeListenerManager, relationInterceptor, relationModel, sourceEntity

Constructor Summary

Constructors

Constructor	Description
ToManyRelationAdapter(Entity sourceEntity, Set<Entity> entities, RelationModel relationModel, EntityFacadeListenerManager entityFacadeListenerManager, EntityInterceptor entityInterceptor, ch.tocco.nice2.persist.core.impl.hibernate.pojo.relation.CollectionInitializerEvaluator collectionInitializerEvaluator)

Method Summary

Modifier and Type	Method	Description
void	clear()	Removes all entities in this relation.
Entity	get(int index, boolean eager)	Get the entity at the specified index.
RelationInterceptor	getInnerInterceptor()
Iterator<Entity>	iterator()	The iterator of the superclass uses EntityList.size() which might cause a query in this implementation.
void	set(Iterable<Entity> entities)	Creates an intersection of the currently linked ones and the given ones, and then calls Relation.remove(ch.tocco.nice2.persist.core.api.entity.Entity) and Relation.add(ch.tocco.nice2.persist.core.api.entity.Entity) in a loop.
protected void	setInverseRelation(Entity entity, boolean added)
int	size()	Get the number of entities this list contains.

Methods inherited from class ch.tocco.nice2.persist.core.impl.hibernate.pojo.relation.AbstractRelationAdapter

add, expect, expectAtLeast, expectAtMost, fireRelationChangingEvent, get, getKey, getKeys, getManager, getModel, getPageCount, getPageSize, getRelationModel, getSource, indexOf, remove, set, setPageSize, unwrap, verifyTransactionIsRunning

Methods inherited from class ch.tocco.nice2.persist.core.api.entity.AbstractEntityList

contains, get, get, get, isEmpty, toList, toList

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ch.tocco.nice2.persist.core.api.entity.EntityList

contains, doWithSingleResult, doWithSingleResultOr, expectOr, get, getFirstEntity, getOnlyResult, getOptionalOnlyResult, getOptionalOnlyResult, isEmpty, requireFirstEntity, spliterator, stream, toList, toList

Methods inherited from interface java.lang.Iterable

forEach

Methods inherited from interface ch.tocco.nice2.persist.core.api.entity.Relation

expectAtMostOrThrow, expectOrThrow, get, get

Constructor Details

ToManyRelationAdapter

public ToManyRelationAdapter(Entity sourceEntity,
 Set<Entity> entities,
 RelationModel relationModel,
 EntityFacadeListenerManager entityFacadeListenerManager,
 EntityInterceptor entityInterceptor,
 ch.tocco.nice2.persist.core.impl.hibernate.pojo.relation.CollectionInitializerEvaluator collectionInitializerEvaluator)

Method Details

getInnerInterceptor

public RelationInterceptor getInnerInterceptor()

Specified by:

getInnerInterceptor in class AbstractRelationAdapter

setInverseRelation

protected void setInverseRelation(Entity entity,
 boolean added)

set

public void set(Iterable<Entity> entities)

Description copied from interface: Relation

Creates an intersection of the currently linked ones and the given ones, and then calls Relation.remove(ch.tocco.nice2.persist.core.api.entity.Entity) and Relation.add(ch.tocco.nice2.persist.core.api.entity.Entity) in a loop.

Parameters:

entities - The list of entities that will be the only linked ones.

clear

public void clear()

Description copied from interface: Relation

Removes all entities in this relation. Does the same as calling remove() for all linked entities.

get

public Entity get(int index,
 boolean eager)

Description copied from interface: EntityList

Get the entity at the specified index.

Parameters:

index - The index.

eager - true, if a page should be eagerly loaded, if the entity's state is hollow, false otherwise.

Returns:

The entity at the specified index potentially in unusable state, or null.

size

public int size()

Description copied from interface: EntityList

Get the number of entities this list contains.

Returns:

The number of entities.

iterator

public Iterator<Entity> iterator()

The iterator of the superclass uses EntityList.size() which might cause a query in this implementation. Therefore we avoid this unnecessary query as the collection will initialized anyway.

Specified by:

iterator in interface Iterable<Entity>

Overrides:

iterator in class AbstractEntityList