com.edorasware.api.query

Interface Predicate

All Known Implementing Classes:

BasePredicate, ComparisonPredicate, CompositePredicate, IdentityLinkPredicate, InnerSelectInPredicate, InPredicate, MultipleNamedValuePredicate, NamedValuePredicate, NeverMatchingPredicate, NotNullPredicate, NotPredicate, NullPredicate, QueryParameterPredicate, RawPredicate, RenderingModePredicate

public interface Predicate

Defines a criterion to be matched in a Query.

Multiple predicates can be combined through boolean operators in bulk via and(2 .. n Predicates) / or(2 .. n Predicates).

Method Summary

Modifier and Type	Method and Description
Predicate	and(Predicate predicate) Concatenates this predicate with the given predicate to a combined predicate through a logical AND operator.
Predicate	apply(Function<Predicate,Predicate> transformation) Applies the given transformation, returning the transformed predicate.
Predicate	not() Negates this predicate through a logical NOT operator.
Predicate	or(Predicate predicate) Concatenates this predicate with the given predicate to a combined predicate through a logical OR operator.

Method Detail

and

Predicate and(Predicate predicate)

Concatenates this predicate with the given predicate to a combined predicate through a logical AND operator.

Parameters:

predicate - the other predicate

Returns:

a new predicate representing the concatenation

or

Predicate or(Predicate predicate)

Concatenates this predicate with the given predicate to a combined predicate through a logical OR operator.

Parameters:

predicate - the other predicate

Returns:

a new predicate representing the concatenation

not

Predicate not()

Negates this predicate through a logical NOT operator.

Returns:

a new predicate representing the negation

apply

Predicate apply(Function<Predicate,Predicate> transformation)

Applies the given transformation, returning the transformed predicate.

If the predicate implementation wraps sub-predicates then this method needs to be overwritten to transform the sub-predicates as well.

Parameters:

transformation - the predicate transformation to be applied

Returns:

the transformed predicate (or the current instance if no transformation was applied)