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}