org.apache.openjpa.persistence.criteria
Class Joins.KeyJoin<K,V>

java.lang.Object
  org.apache.openjpa.persistence.criteria.SelectionImpl<X>
      org.apache.openjpa.persistence.criteria.ExpressionImpl<X>
          org.apache.openjpa.persistence.criteria.PathImpl<Z,X>
              org.apache.openjpa.persistence.criteria.FromImpl<Z,E>
                  org.apache.openjpa.persistence.criteria.Joins.AbstractCollection<Z,Set<E>,E>
                      org.apache.openjpa.persistence.criteria.Joins.Set<Map<K,V>,K>
                          org.apache.openjpa.persistence.criteria.Joins.KeyJoin<K,V>

Type Parameters:

K - the type of the key of the original java.util.Map attribute

V - the type of the value of the original java.util.Map attribute

All Implemented Interfaces:

Expression<K>, FetchParent<Map<K,V>,K>, From<Map<K,V>,K>, Join<Map<K,V>,K>, Path<K>, PluralJoin<Map<K,V>,Set<K>,K>, Selection<K>, SetJoin<Map<K,V>,K>, TupleElement<K>, CriteriaExpression

Enclosing class:

Joins

static class Joins.KeyJoin<K,V>
extends Joins.Set<Map<K,V>,K>

A specialized join via key of a java.util.Map<K,V> attribute. Treats the map key as a pseudo-attribute of type java.util.Set<K> of a pseduo-managed type corresponding to java.util.Map<K,V>.

Field Summary

Fields inherited from class org.apache.openjpa.persistence.criteria.PathImpl

_member, _parent

Constructor Summary

Joins.KeyJoin(FromImpl<?,Map<K,V>> parent, Members.KeyAttributeImpl<? super Map<K,V>,K> member, JoinType jt)

Method Summary

Value

toValue(ExpressionFactory factory, CriteriaQueryImpl<?> c) Convert this path to a kernel path (value).

Methods inherited from class org.apache.openjpa.persistence.criteria.Joins.Set

getModel

Methods inherited from class org.apache.openjpa.persistence.criteria.Joins.AbstractCollection

asVariable, getAttribute, getJoinType, getMemberClassMetaData, getParent, toKernelExpression

Methods inherited from class org.apache.openjpa.persistence.criteria.FromImpl

acceptVisit, assertJoinable, fetch, fetch, fetch, fetch, fetch, fetch, getCorrelationParent, getFetches, getJoins, getType, join, join, join, join, join, join, join, join, join, join, join, join, joinCollection, joinCollection, joinList, joinList, joinMap, joinMap, joinSet, joinSet

Methods inherited from class org.apache.openjpa.persistence.criteria.PathImpl

asValue, get, get, get, get, getCorrelatedJoin, getCorrelatedPath, getCorrelatedRoot, getEmbeddedFieldMetaData, getInnermostMember, getInnermostParentPath, getMember, getParentPath, inSubquery, isCorrelated, setCorrelatedPath, traversePath, type

Methods inherited from class org.apache.openjpa.persistence.criteria.ExpressionImpl

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

Methods inherited from class org.apache.openjpa.persistence.criteria.SelectionImpl

alias, asProjection, assertValidName, getAlias, getCompoundSelectionItems, getJavaType, isAliased, isAutoAliased, isCompoundSelection, setAutoAlias

Methods inherited from class java.lang.Object

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

Methods inherited from interface javax.persistence.criteria.Join

getAttribute, getJoinType, getParent

Methods inherited from interface javax.persistence.criteria.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 javax.persistence.criteria.Path

get, get, get, get, getParentPath, type

Methods inherited from interface javax.persistence.criteria.Expression

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

Methods inherited from interface javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

Methods inherited from interface javax.persistence.TupleElement

getAlias, getJavaType

Methods inherited from interface javax.persistence.criteria.FetchParent

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

Constructor Detail

Joins.KeyJoin

public Joins.KeyJoin(FromImpl<?,Map<K,V>> parent,
                     Members.KeyAttributeImpl<? super Map<K,V>,K> member,
                     JoinType jt)

Method Detail

toValue

public Value toValue(ExpressionFactory factory,
                     CriteriaQueryImpl<?> c)

Description copied from class: Joins.AbstractCollection

Convert this path to a kernel path (value).

Overrides:

toValue in class Joins.AbstractCollection<Map<K,V>,Set<K>,K>

Parameters:

factory - creates the kernel expression

c - the query definition context of this expression

Returns:

an equivalent kernel value