/*
* Copyright 2000-2016 Vaadin Ltd.
*
* 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.vaadin.server;
import java.io.Serializable;
import java.util.Comparator;
/**
* A {@link Comparator} that is also {@link Serializable}.
* <p>
* You can create a serializable comparator from a regular comparator through a
* method reference by appending <code>::compare</code>. For example
* <code>SerializableComparator<Employee>
* comparator = Comparator.comparing(Employee::getFirstName)::compare</code>.
* The resulting comparator will in most cases cause exceptions if it is
* actually being serialized, but this construct will enable using the
* shorthands in {@link Comparator} in applications where session will not be
* serialized.
*
* @author Vaadin Ltd
* @param <T>
* the type of objects that may be compared by this comparator
* @since 8.0
*
*/
@FunctionalInterface
public interface SerializableComparator<T> extends Comparator<T>, Serializable {
// Relevant methods inherited from Comparator
}