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