org.hibernate.hql.ast.spi.predicate

Interface Predicate<Q>

Type Parameters:

Q - the type of query objects created by this predicate

All Known Subinterfaces:

NegatablePredicate<Q>, ParentPredicate<Q>

All Known Implementing Classes:

AbstractPredicate, ComparisonPredicate, ConjunctionPredicate, DisjunctionPredicate, InPredicate, IsNullPredicate, LikePredicate, LuceneComparisonPredicate, LuceneConjunctionPredicate, LuceneDisjunctionPredicate, LuceneInPredicate, LuceneIsNullPredicate, LuceneLikePredicate, LuceneNegationPredicate, LuceneRangePredicate, LuceneRootPredicate, NegationPredicate, RangePredicate, RootPredicate

public interface Predicate<Q>

Represents a predicate as contained in the WHERE clause of a query. Implementations know how to create an equivalent query for themselves and, in case of parent predicates, their children.

Author:

Gunnar Morling

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Predicate.Type The type of a predicate.

Method Summary

Methods

Modifier and Type	Method and Description
<T extends Predicate<?>> T	as(Class<T> type) Narrows the type of this predicate down to the given type.
Q	getQuery() Returns the query represented by this predicate.
Predicate.Type	getType() Returns the type of this predicate.

Method Detail

getQuery

Q getQuery()

Returns the query represented by this predicate. Contains the all sub-predicates if this predicate is a parent predicate.

Returns:

the query represented by this predicate

getType

Predicate.Type getType()

Returns the type of this predicate.

Returns:

the type of this predicate

as

<T extends Predicate<?>> T as(Class<T> type)

Narrows the type of this predicate down to the given type. The type should be checked before via getType().

Parameters:

type - the type to narrow down to

Returns:

this predicate, narrowed down to the given type