/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.heron.streamlet;

import java.io.Serializable;
import java.util.function.BiFunction;

/**
 * All user supplied transformation functions have to be serializable.
 * Thus all Streamlet transformation definitions take Serializable
 * Functions as their input. We simply decorate java.util. function
 * definitions with a Serializable tag to ensure that any supplied
 * lambda functions automatically become serializable.
 */
public interface SerializableBiFunction<A, B, C> extends BiFunction<A, B, C>,
    Serializable {
}