org.apache.openjpa.persistence.criteria
Class Expressions.Count

java.lang.Object
  extended by org.apache.openjpa.persistence.criteria.SelectionImpl<X>
      extended by org.apache.openjpa.persistence.criteria.ExpressionImpl<X>
          extended by org.apache.openjpa.persistence.criteria.Expressions.UnaryFunctionalExpression<Long>
              extended by org.apache.openjpa.persistence.criteria.Expressions.Count
All Implemented Interfaces:
Expression<Long>, Selection<Long>, TupleElement<Long>, CriteriaExpression
Enclosing class:
Expressions

public static class Expressions.Count
extends Expressions.UnaryFunctionalExpression<Long>


Field Summary
 
Fields inherited from class org.apache.openjpa.persistence.criteria.Expressions.UnaryFunctionalExpression
e
 
Constructor Summary
Expressions.Count(Expression<?> x)
           
Expressions.Count(Expression<?> x, boolean distinct)
           
 
Method Summary
 StringBuilder asValue(AliasContext q)
          Get a string representation of this node as a value in the context of the given query.
 Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q)
          Bridge contract to convert this facade expression to a kernel value.
 
Methods inherited from class org.apache.openjpa.persistence.criteria.Expressions.UnaryFunctionalExpression
acceptVisit
 
Methods inherited from class org.apache.openjpa.persistence.criteria.ExpressionImpl
as, in, in, in, in, isNotNull, isNull, toKernelExpression
 
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.Selection
alias, getCompoundSelectionItems, isCompoundSelection
 
Methods inherited from interface javax.persistence.TupleElement
getAlias, getJavaType
 

Constructor Detail

Expressions.Count

public Expressions.Count(Expression<?> x)

Expressions.Count

public Expressions.Count(Expression<?> x,
                         boolean distinct)
Method Detail

toValue

public Value toValue(ExpressionFactory factory,
                     CriteriaQueryImpl<?> q)
Description copied from class: ExpressionImpl
Bridge contract to convert this facade expression to a kernel value.

Specified by:
toValue in class ExpressionImpl<Long>
Parameters:
factory - creates the kernel expression
q - the query definition context of this expression
Returns:
an equivalent kernel value

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 SelectionImpl<Long>


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