Java tutorial
/* * 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.commons.functor; /** * A functor that takes two arguments and returns a value. * <p> * Implementors are encouraged but not required to make their functors * {@link java.io.Serializable Serializable}. * </p> * @param <L> the left argument type. * @param <R> the right argument type. * @param <T> the returned value type. * @since 1.0 * @version $Revision: 1345136 $ $Date: 2012-06-01 09:47:06 -0300 (Fri, 01 Jun 2012) $ */ public interface BinaryFunction<L, R, T> extends BinaryFunctor<L, R> { /** * Evaluate this function. * * @param left the L element of the ordered pair of arguments * @param right the R element of the ordered pair of arguments * @return the T result of this function for the given arguments */ T evaluate(L left, R right); }