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/*
 *
 * Copyright (c) 2006-2020, Speedment, Inc. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); You may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
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();
}