org.apache.hudi.common.util.Functions Maven / Gradle / Ivy
/*
* 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.hudi.common.util;
import java.io.Serializable;
/**
* An interface contains a set of functions.
*/
public interface Functions {
static Runnable noop() {
return () -> {
};
}
/**
* A function which has not any parameter.
*/
interface Function0 extends Serializable {
R apply();
}
/**
* A function which contains only one parameter.
*/
interface Function1 extends Serializable {
R apply(T1 val1);
}
/**
* A function which contains two parameters.
*/
interface Function2 extends Serializable {
R apply(T1 val1, T2 val2);
}
/**
* A function which contains three parameters.
*/
interface Function3 extends Serializable {
R apply(T1 val1, T2 val2, T3 val3);
}
}