    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
    015    package 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     */
    022    public 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    }