Interface MapJoin<Z,K,V>

Type Parameters:

Z - the source type of the join

K - the type of the target Map key

V - the type of the target Map value

All Superinterfaces:

Expression<V>, FetchParent<Z,V>, From<Z,V>, Join<Z,V>, Path<V>, PluralJoin<Z,Map<K,V>,V>, Selection<V>, TupleElement<V>

public interface MapJoin<Z,K,V>
extends PluralJoin<Z,Map<K,V>,V>

The MapJoin interface is the type of the result of joining to a collection over an association or element collection that has been specified as a java.util.Map.

Since:

Java Persistence 2.0

Method Summary

Modifier and Type	Method	Description
Expression<Map.Entry<K,V>>	entry()	Create an expression that corresponds to the map entry.
MapAttribute<? super Z, K, V>	getModel()	Return the metamodel representation for the map attribute.
Path<K>	key()	Create a path expression that corresponds to the map key.
Path<V>	value()	Create a path expression that corresponds to the map value.

Methods inherited from interface Expression

as, in, in, in, in, isNotNull, isNull

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, joinCollection, joinCollection, joinList, joinList, joinMap, joinMap, joinSet, joinSet

Methods inherited from interface Join

getAttribute, getJoinType, getParent

Methods inherited from interface Path

get, get, get, get, getParentPath, type

Methods inherited from interface Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface TupleElement

getAlias, getJavaType

Method Details

getModel

MapAttribute<? super Z, K, V> getModel()

Return the metamodel representation for the map attribute.

Specified by:

getModel in interface Path<Z>

Specified by:

getModel in interface PluralJoin<Z,K,V>

Returns:

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

key

Path<K> key()

Create a path expression that corresponds to the map key.

Returns:

path corresponding to map key

value

Path<V> value()

Create a path expression that corresponds to the map value. This method is for stylistic use only: it just returns this.

Returns:

path corresponding to the map value

entry

Expression<Map.Entry<K,V>> entry()

Create an expression that corresponds to the map entry.

Returns:

expression corresponding to the map entry