Interface SqmNegatablePredicate

All Superinterfaces:

Expression<Boolean>, JpaCriteriaNode, JpaExpression<Boolean>, JpaPredicate, JpaSelection<Boolean>, JpaTupleElement<Boolean>, Predicate, Selection<Boolean>, Serializable, SqmCacheable, SqmExpressibleAccessor<Boolean>, SqmExpression<Boolean>, SqmNode, SqmPredicate, SqmSelectableNode<Boolean>, SqmTypedNode<Boolean>, SqmVisitableNode, TupleElement<Boolean>

All Known Subinterfaces:

SqmInPredicate<T>

All Known Implementing Classes:

AbstractNegatableSqmPredicate, SqmBetweenPredicate, SqmBooleanExpressionPredicate, SqmComparisonPredicate, SqmEmptinessPredicate, SqmExistsPredicate, SqmInListPredicate, SqmInSubQueryPredicate, SqmLikePredicate, SqmMemberOfPredicate, SqmNullnessPredicate, SqmTruthnessPredicate

public interface SqmNegatablePredicate
extends SqmPredicate

Contract for predicates that have a negated form, e.g. x is not null as opposed to not(x is null)

Nested Class Summary

Nested classes/interfaces inherited from interface Predicate

Predicate.BooleanOperator

Field Summary

Fields inherited from interface SqmNode

LOG

Method Summary

Modifier and Type	Method	Description
boolean	isNegated()	Is this predicate (currently) negated?
void	negate()	Apply an external negation.

Methods inherited from interface JpaSelection

alias, getCompoundSelectionItems, getSelectionItems

Methods inherited from interface JpaTupleElement

getJavaType, getJavaTypeName, isEnum

Methods inherited from interface Predicate

getExpressions, getOperator

Methods inherited from interface Selection

isCompoundSelection

Methods inherited from interface SqmCacheable

cacheHashCode, isCompatible

Methods inherited from interface SqmExpression

applyInferableType, as, asBigDecimal, asBigInteger, asDouble, asFloat, asInteger, asLong, asString, cast, castAs, equalTo, equalTo, in, in, in, in, isNotNull, isNull, notEqualTo, notEqualTo, visitSubSelectableNodes

Methods inherited from interface SqmNode

asLoggableText, nodeBuilder

Methods inherited from interface SqmPredicate

copy, getExpressible, getJavaTypeDescriptor, getNodeJavaType, getNodeType, not

Methods inherited from interface SqmSelectableNode

getTupleLength

Methods inherited from interface SqmVisitableNode

accept, appendHqlString, toHqlString

Methods inherited from interface TupleElement

getAlias

Method Details

isNegated

boolean isNegated()

Is this predicate (currently) negated?

Specified by:

isNegated in interface Predicate

Returns:

true if we have a negated form currently

negate

void negate()

Apply an external negation. Called when we encounter a NOT grouping.

For example, for not(x is null) we build the SqmNullnessPredicate and then call its negate method which results in x is not null.

Can be applied nested as well. For example, not(not(x is null)) becomes x is null because the double-negative cancel each other out.