java/function/Function.java

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *    http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 package org.apache.spark.api.java.function;
0019
0020 import java.io.Serializable;
0021
0022 /**
0023  * Base interface for functions whose return types do not create special RDDs. PairFunction and
0024  * DoubleFunction are handled separately, to allow PairRDDs and DoubleRDDs to be constructed
0025  * when mapping RDDs of other types.
0026  */
0027 @FunctionalInterface
0028 public interface Function<T1, R> extends Serializable {
0029   R call(T1 v1) throws Exception;
0030 }