001// Copyright 2010, 2011 The Apache Software Foundation 002// 003// Licensed under the Apache License, Version 2.0 (the "License"); 004// you may not use this file except in compliance with the License. 005// You may obtain a copy of the License at 006// 007// http://www.apache.org/licenses/LICENSE-2.0 008// 009// Unless required by applicable law or agreed to in writing, software 010// distributed under the License is distributed on an "AS IS" BASIS, 011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 012// See the License for the specific language governing permissions and 013// limitations under the License. 014 015package org.apache.tapestry5.func; 016 017/** 018 * A generalization of {@link Mapper} for a two-input function. 019 * <p> 020 * This was converted from to an interface from an abstract base class in 5.3. 021 */ 022public interface Mapper2<A, B, C> 023{ 024 /** 025 * Take, as input, two values (from two flows) and return a computed value of 026 * the third type. 027 */ 028 C map(A first, B second); 029}