/**
*
* Copyright (c) 2006-2017, 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.field.trait;
import java.util.function.Predicate;
/**
*
* @param <ENTITY> the entity type
*
* @author Emil Forslund
* @since 3.0.0
*/
public interface HasReferenceOperators<ENTITY> {
/**
* Returns a {@link java.util.function.Predicate} that will evaluate to
* {@code true}, if and only if this Field is {@code null}.
*
* @return a Predicate that will evaluate to {@code true}, if and only if
* this Field is {@code null}
*/
Predicate<ENTITY> isNull();
/**
* Returns a {@link java.util.function.Predicate} that will evaluate to
* {@code true}, if and only if this Field is <em>not</em> {@code null}.
*
* @return a Predicate that will evaluate to {@code true}, if and only if
* this Field is <em>not</em> {@code null}
*/
default Predicate<ENTITY> isNotNull() {
return isNull().negate();
}
}