org.hibernate.ejb.criteria.predicate
Class NullnessPredicate

java.lang.Object
  org.hibernate.ejb.criteria.AbstractNode
      org.hibernate.ejb.criteria.expression.AbstractTupleElement<X>
          org.hibernate.ejb.criteria.expression.SelectionImpl<T>
              org.hibernate.ejb.criteria.expression.ExpressionImpl<Boolean>
                  org.hibernate.ejb.criteria.predicate.AbstractPredicateImpl
                      org.hibernate.ejb.criteria.predicate.AbstractSimplePredicate
                          org.hibernate.ejb.criteria.predicate.NullnessPredicate

All Implemented Interfaces:

Serializable, Expression<Boolean>, Predicate, Selection<Boolean>, TupleElement<Boolean>, UnaryOperatorExpression<Boolean>, ExpressionImplementor<Boolean>, ParameterContainer, Renderable, SelectionImplementor<Boolean>, TupleElementImplementor<Boolean>

public class NullnessPredicate
extends AbstractSimplePredicate
implements UnaryOperatorExpression<Boolean>, Serializable

Defines a Predicate for checking the nullness state of an expression, aka an IS [NOT] NULL predicate.

The NOT NULL form can be built by calling the constructor and then calling AbstractPredicateImpl.not().

See Also:

Serialized Form

Nested Class Summary

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

Predicate.BooleanOperator

Nested classes/interfaces inherited from interface org.hibernate.ejb.criteria.ParameterContainer

ParameterContainer.Helper

Constructor Summary

NullnessPredicate(CriteriaBuilderImpl criteriaBuilder, Expression<?> operand)
Constructs the affirmitive form of nullness checking (IS NULL).

Method Summary

Expression<?>	getOperand() Get the operand.
void	registerParameters(ParameterRegistry registry) Register any parameters contained within this query component with the given registry.
String	render(CriteriaQueryCompiler.RenderingContext renderingContext)
String	renderProjection(CriteriaQueryCompiler.RenderingContext renderingContext)

Methods inherited from class org.hibernate.ejb.criteria.predicate.AbstractSimplePredicate

getExpressions, getOperator

Methods inherited from class org.hibernate.ejb.criteria.predicate.AbstractPredicateImpl

getCompoundSelectionItems, isCompoundSelection, isNegated, not

Methods inherited from class org.hibernate.ejb.criteria.expression.ExpressionImpl

as, asBigDecimal, asBigInteger, asDouble, asFloat, asInteger, asLong, asString, in, in, in, in, isNotNull, isNull

Methods inherited from class org.hibernate.ejb.criteria.expression.SelectionImpl

alias, getValueHandlers

Methods inherited from class org.hibernate.ejb.criteria.expression.AbstractTupleElement

forceConversion, getAlias, getJavaType, getValueHandler, resetJavaType, setAlias

Methods inherited from class org.hibernate.ejb.criteria.AbstractNode

criteriaBuilder

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

Methods inherited from interface org.hibernate.ejb.criteria.SelectionImplementor

getValueHandlers

Methods inherited from interface org.hibernate.ejb.criteria.TupleElementImplementor

getValueHandler

Constructor Detail

NullnessPredicate

public NullnessPredicate(CriteriaBuilderImpl criteriaBuilder,
                         Expression<?> operand)

Constructs the affirmitive form of nullness checking (IS NULL). To construct the negative form (IS NOT NULL) call AbstractPredicateImpl.not() on the constructed instance.

Parameters:

criteriaBuilder - The query builder from whcih this originates.

operand - The expression to check.

Method Detail

getOperand

public Expression<?> getOperand()

Description copied from interface: UnaryOperatorExpression

Get the operand.

Specified by:

getOperand in interface UnaryOperatorExpression<Boolean>

Returns:

The operand.

registerParameters

public void registerParameters(ParameterRegistry registry)

Description copied from interface: ParameterContainer

Register any parameters contained within this query component with the given registry.

Specified by:

registerParameters in interface ParameterContainer

Parameters:

registry - The parameter registry with which to register.

render

public String render(CriteriaQueryCompiler.RenderingContext renderingContext)

Specified by:

render in interface Renderable

renderProjection

public String renderProjection(CriteriaQueryCompiler.RenderingContext renderingContext)

Specified by:

renderProjection in interface Renderable