    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}