org.apache.openjpa.persistence.criteria
Class Expressions.Exists<X>

java.lang.Object
  org.apache.openjpa.persistence.criteria.SelectionImpl<X>
      org.apache.openjpa.persistence.criteria.ExpressionImpl<Boolean>
          org.apache.openjpa.persistence.criteria.PredicateImpl
              org.apache.openjpa.persistence.criteria.Expressions.SubqueryPredicate<X>
                  org.apache.openjpa.persistence.criteria.Expressions.Exists<X>

All Implemented Interfaces:

Expression<Boolean>, Predicate, Selection<Boolean>, TupleElement<Boolean>, CriteriaExpression

Enclosing class:

Expressions

public static class Expressions.Exists<X>
extends Expressions.SubqueryPredicate<X>

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.openjpa.persistence.criteria.PredicateImpl

PredicateImpl.And, PredicateImpl.Or

Nested classes/interfaces inherited from interface javax.persistence.criteria.Predicate

Predicate.BooleanOperator

Field Summary

Fields inherited from class org.apache.openjpa.persistence.criteria.Expressions.SubqueryPredicate

e

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

_exps, FALSE, TRUE

Constructor Summary

Expressions.Exists(Subquery<X> x)

Method Summary

StringBuilder	asValue(AliasContext q) Get a string representation of this node as a value in the context of the given query.
(package private) Expression	toKernelExpression(ExpressionFactory factory, CriteriaQueryImpl<?> q) Bridge contract to convert this facade expression to a kernel expression.

Methods inherited from class org.apache.openjpa.persistence.criteria.Expressions.SubqueryPredicate

acceptVisit

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

add, getExpressions, getOperator, isEmpty, isNegated, markNegated, not, toValue

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, asVariable, 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.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

Constructor Detail

Expressions.Exists

public Expressions.Exists(Subquery<X> x)

Method Detail

toKernelExpression

Expression toKernelExpression(ExpressionFactory factory,
                              CriteriaQueryImpl<?> q)

Description copied from class: ExpressionImpl

Bridge contract to convert this facade expression to a kernel expression.

Overrides:

toKernelExpression in class PredicateImpl

Parameters:

factory - creates the kernel expression

q - the query definition context of this expression

Returns:

an equivalent kernel expression

asValue

public StringBuilder asValue(AliasContext q)

Description copied from interface: CriteriaExpression

Get a string representation of this node as a value in the context of the given query.

Specified by:

asValue in interface CriteriaExpression

Overrides:

asValue in class PredicateImpl