org.hibernate.jpa.criteria.predicate

Class ExplicitTruthValueCheck

java.lang.Object

org.hibernate.jpa.criteria.AbstractNode

org.hibernate.jpa.criteria.expression.AbstractTupleElement<X>

org.hibernate.jpa.criteria.expression.SelectionImpl<T>

org.hibernate.jpa.criteria.expression.ExpressionImpl<Boolean>

org.hibernate.jpa.criteria.predicate.AbstractPredicateImpl

org.hibernate.jpa.criteria.predicate.AbstractSimplePredicate

org.hibernate.jpa.criteria.predicate.ExplicitTruthValueCheck

All Implemented Interfaces:

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

public class ExplicitTruthValueCheck
extends AbstractSimplePredicate
implements Serializable

ANSI-SQL defines TRUE, FALSE and UNKNOWN as truth values. These truth values are used to explicitly check the result of a boolean expression (the syntax is like a > b IS TRUE. IS TRUE is the assumed default.

JPA defines support for only IS TRUE and IS FALSE, not IS UNKNOWN (a > NULL is an example where the result would be UNKNOWN.

Author:

Steve Ebersole

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.jpa.criteria.ParameterContainer

ParameterContainer.Helper

Constructor Summary

Constructors

Constructor and Description
ExplicitTruthValueCheck(CriteriaBuilderImpl criteriaBuilder, Expression<Boolean> booleanExpression, TruthValue truthValue)

Method Summary

Modifier and Type	Method and Description
Expression<Boolean>	getBooleanExpression()
TruthValue	getTruthValue()
void	registerParameters(ParameterRegistry registry) Register any parameters contained within this query component with the given registry.
String	render(boolean isNegated, RenderingContext renderingContext) Form of Renderable.render(org.hibernate.jpa.criteria.compile.RenderingContext) used when the predicate is wrapped in a negated wrapper.

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

getExpressions, getOperator, isJunction, render, renderProjection

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

getCompoundSelectionItems, isCompoundSelection, isNegated, not

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

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

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

alias, getValueHandlers

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

forceConversion, getAlias, getJavaType, getValueHandler, resetJavaType, setAlias

Methods inherited from class org.hibernate.jpa.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 org.hibernate.jpa.criteria.predicate.PredicateImplementor

criteriaBuilder

Methods inherited from interface javax.persistence.criteria.Expression

as, in, in, in, in, isNotNull, isNull

Methods inherited from interface javax.persistence.criteria.Selection

alias

Methods inherited from interface javax.persistence.TupleElement

getAlias, getJavaType

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

getValueHandlers

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

getValueHandler

Constructor Detail

ExplicitTruthValueCheck

public ExplicitTruthValueCheck(CriteriaBuilderImpl criteriaBuilder,
                               Expression<Boolean> booleanExpression,
                               TruthValue truthValue)

Method Detail

getBooleanExpression

public Expression<Boolean> getBooleanExpression()

getTruthValue

public TruthValue getTruthValue()

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(boolean isNegated,
                     RenderingContext renderingContext)

Description copied from interface: PredicateImplementor

Form of Renderable.render(org.hibernate.jpa.criteria.compile.RenderingContext) used when the predicate is wrapped in a negated wrapper. Allows passing down the negation flag.

Note that this form is no-op in compound (junction) predicates. The reason being that compound predicates are more complex and the negation is applied during its creation.

Specified by:

render in interface PredicateImplementor

Parameters:

isNegated - Should the predicate be negated.

renderingContext - The context for rendering

Returns:

The rendered predicate fragment.