javax.persistence.criteria

Interface Predicate

All Superinterfaces:

Expression<Boolean>, Selection<Boolean>, TupleElement<Boolean>

All Known Subinterfaces:

CriteriaBuilder.In<T>, PredicateImplementor

All Known Implementing Classes:

AbstractPredicateImpl, AbstractSimplePredicate, BetweenPredicate, BooleanAssertionPredicate, BooleanExpressionPredicate, BooleanStaticAssertionPredicate, ComparisonPredicate, CompoundPredicate, ExistsPredicate, ExplicitTruthValueCheck, InPredicate, IsEmptyPredicate, LikePredicate, MemberOfPredicate, NegatedPredicateWrapper, NullnessPredicate

public interface Predicate
extends Expression<Boolean>

The type of a simple or compound predicate: a conjunction or disjunction of restrictions. A simple predicate is considered to be a conjunction with a single conjunct.

Since:

Java Persistence 2.0

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Predicate.BooleanOperator

Method Summary

Modifier and Type	Method and Description
List<Expression<Boolean>>	getExpressions() Return the top-level conjuncts or disjuncts of the predicate.
Predicate.BooleanOperator	getOperator() Return the boolean operator for the predicate.
boolean	isNegated() Whether the predicate has been created from another predicate by applying the Predicate.not() method or the CriteriaBuilder.not() method.
Predicate	not() Create a negation of the predicate.

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

Method Detail

getOperator

Predicate.BooleanOperator getOperator()

Return the boolean operator for the predicate. If the predicate is simple, this is AND.

Returns:

boolean operator for the predicate

isNegated

boolean isNegated()

Whether the predicate has been created from another predicate by applying the Predicate.not() method or the CriteriaBuilder.not() method.

Returns:

boolean indicating if the predicate is a negated predicate

getExpressions

List<Expression<Boolean>> getExpressions()

Return the top-level conjuncts or disjuncts of the predicate. Returns empty list if there are no top-level conjuncts or disjuncts of the predicate. Modifications to the list do not affect the query.

Returns:

list of boolean expressions forming the predicate

not

Predicate not()

Create a negation of the predicate.

Returns:

negated predicate