Interface CollectionJoin<Z,E>

Type Parameters:

Z - the source type of the join

E - the element type of the target Collection

All Superinterfaces:

Expression<E>, FetchParent<Z,E>, From<Z,E>, Join<Z,E>, Path<E>, PluralJoin<Z, Collection<E>, E>, Selection<E>, TupleElement<E>

public interface CollectionJoin<Z,E>
extends PluralJoin<Z, Collection<E>, E>

The CollectionJoin interface is the type of the result of joining to a collection over an association or element collection that has been specified as a Collection.

Since:

2.0

Method Summary

Modifier and Type	Method	Description
CollectionAttribute<? super Z, E>	getModel()	Return the metamodel representation for the collection attribute.
CollectionJoin<Z,E>	on(BooleanExpression... restrictions)	Modify the join to restrict the result according to the specified ON condition and return the join object.
CollectionJoin<Z,E>	on(Expression<Boolean> restriction)	Modify the join to restrict the result according to the specified ON condition and return the join object.
CollectionJoin<Z,E>	on(List<? extends Expression<Boolean>> restrictions)	Modify the join to restrict the result according to the specified ON condition and return the join object.
<T extends E> CollectionJoin<Z,T>	treat(Class<T> type)	Downcast the element type to the given type.

Methods inherited from interface Expression

as, cast, coalesce, coalesce, count, countDistinct, equalTo, equalTo, in, in, in, in, in, isMember, isNotMember, isNotNull, isNull, notEqualTo, notEqualTo, nullif, nullif, selectCase

Methods inherited from interface FetchParent

fetch, fetch, fetch, fetch, fetch, fetch, getFetches

Methods inherited from interface From

getCorrelationParent, getJoins, isCorrelated, join, join, join, join, join, join, join, join, join, join, join, join, join, join, join, join, joinCollection, joinCollection, joinList, joinList, joinMap, joinMap, joinSet, joinSet

Methods inherited from interface Join

getAttribute, getJoinType, getOn, getParent

Methods inherited from interface Path

get, get, get, get, get, get, get, get, get, getParentPath, type

Methods inherited from interface Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface TupleElement

getAlias, getJavaType

Method Details

on

@Nonnull
CollectionJoin<Z,E> on(@Nonnull
 Expression<Boolean> restriction)

Modify the join to restrict the result according to the specified ON condition and return the join object. Replaces the previous ON condition, if any.

Specified by:

on in interface Join<Z,E>

Parameters:

restriction - a simple or compound boolean expression

Returns:

the modified join object

Since:

2.1

on

@Nonnull
CollectionJoin<Z,E> on(@Nonnull
 BooleanExpression... restrictions)

Modify the join to restrict the result according to the specified ON condition and return the join object. Replaces the previous ON condition, if any.

Specified by:

on in interface Join<Z,E>

Parameters:

restrictions - zero or more restriction predicates

Returns:

the modified join object

Since:

2.1

on

@Nonnull
CollectionJoin<Z,E> on(@Nonnull
 List<? extends Expression<Boolean>> restrictions)

Modify the join to restrict the result according to the specified ON condition and return the join object. Replaces the previous ON condition, if any.

Specified by:

on in interface Join<Z,E>

Parameters:

restrictions - zero or more restriction predicates

Returns:

the modified join object

Since:

4.0

getModel

@Nonnull
CollectionAttribute<? super Z, E> getModel()

Return the metamodel representation for the collection attribute.

Specified by:

getModel in interface Path<Z>

Specified by:

getModel in interface PluralJoin<Z, Collection<E>, E>

Returns:

metamodel type representing the Collection that is the target of the join

treat

@Nonnull
<T extends E> CollectionJoin<Z,T> treat(@Nonnull
 Class<T> type)

Downcast the element type to the given type.

Specified by:

treat in interface From<Z,E>

Specified by:

treat in interface Join<Z,E>

Specified by:

treat in interface Path<Z>

Specified by:

treat in interface PluralJoin<Z, Collection<E>, E>

Type Parameters:

T - the subtype of the element type

Parameters:

type - a subtype of the element type

Returns:

this join downcast to the given element type

Since:

4.0