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package com.speedment.runtime.compute.expression.predicate;

/**
 * @author Emil Forslund
 * @since  3.1.2
 */
public interface IsNull
extends NullPredicate {

    @Override
    default NullPredicateType nullPredicateType() {
        return NullPredicateType.IS_NULL;
    }

    @Override
    default boolean test(T in) {
        final R result = expression().apply(in);
        return result == null;
    }

    @Override
    IsNotNull negate();
}