Top Description Fields Constructors Methods
org.hibernate.query.criteria.internal.predicate

public Class NullnessPredicate

extends AbstractSimplePredicate
implements UnaryOperatorExpression<Boolean>, Serializable
Class Inheritance
All Implemented Interfaces
java.io.Serializable, org.hibernate.query.criteria.internal.expression.UnaryOperatorExpression, javax.persistence.criteria.Expression, javax.persistence.criteria.Selection, javax.persistence.TupleElement
Imports
java.io.Serializable, javax.persistence.criteria.Expression, org.hibernate.query.criteria.internal.CriteriaBuilderImpl, .ParameterRegistry, .Renderable, org.hibernate.query.criteria.internal.compile.RenderingContext, org.hibernate.query.criteria.internal.expression.UnaryOperatorExpression
Defines a javax.persistence.criteria.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 not.

Author
Steve Ebersole

Field Summary

Modifier and TypeField and Description
private final Expression<?>
operand

Constructor Summary

AccessConstructor and Description
public
NullnessPredicate(CriteriaBuilderImpl
The query builder from whcih this originates.
criteriaBuilder, Expression<?>
The expression to check.
operand)

Constructs the affirmative form of nullness checking (IS NULL).

Method Summary

Modifier and TypeMethod and Description
private String
check(boolean negated)

public Expression<?>
getOperand()

Implements org.hibernate.query.criteria.internal.expression.UnaryOperatorExpression.getOperand.

Get the operand.
public void
registerParameters(ParameterRegistry
The parameter registry with which to register.
registry)

Implements org.hibernate.query.criteria.internal.ParameterContainer.registerParameters.

Register any parameters contained within this query component with the given registry.
public String
render(boolean
Should the predicate be negated.
isNegated, RenderingContext
The context for rendering
renderingContext)

Implements org.hibernate.query.criteria.internal.predicate.PredicateImplementor.render.

Form of Renderable#render used when the predicate is wrapped in a negated wrapper.
Inherited from org.hibernate.query.criteria.internal.predicate.AbstractSimplePredicate:
getExpressionsgetOperatorisJunctionrender

Field Detail

operandback to summary
private final Expression<?> operand

Constructor Detail

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

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

Parameters
criteriaBuilder:CriteriaBuilderImpl

The query builder from whcih this originates.

operand:Expression<?>

The expression to check.

Method Detail

checkback to summary
private String check(boolean negated)
getOperandback to summary
public Expression<?> getOperand()

Implements org.hibernate.query.criteria.internal.expression.UnaryOperatorExpression.getOperand.

Doc from org.hibernate.query.criteria.internal.expression.UnaryOperatorExpression.getOperand.

Get the operand.

Returns:Expression<?>

The operand.

Annotations
@Override
registerParametersback to summary
public void registerParameters(ParameterRegistry registry)

Implements org.hibernate.query.criteria.internal.ParameterContainer.registerParameters.

Doc from org.hibernate.query.criteria.internal.ParameterContainer.registerParameters.

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

Parameters
registry:ParameterRegistry

The parameter registry with which to register.

Annotations
@Override
renderback to summary
public String render(boolean isNegated, RenderingContext renderingContext)

Implements org.hibernate.query.criteria.internal.predicate.PredicateImplementor.render.

Doc from org.hibernate.query.criteria.internal.predicate.PredicateImplementor.render.

Form of Renderable#render 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.

Parameters
isNegated:boolean

Should the predicate be negated.

renderingContext:RenderingContext

The context for rendering

Returns:String

The rendered predicate fragment.

Annotations
@Override