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}