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

java.lang.Object
  org.apache.openjpa.persistence.criteria.SelectionImpl<X>
      org.apache.openjpa.persistence.criteria.ExpressionImpl<X>
          org.apache.openjpa.persistence.criteria.Expressions.UnaryFunctionalExpression<Long>
              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>