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

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


Copyright © 2006-2010 Apache Software Foundation. All Rights Reserved.