001// Copyright 2006 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.ioc.services;
016
017/**
018 * Responsible for converting from one type to another. This is used primarily around component parameters.
019 *
020 * @param <S> the source type (input)
021 * @param <T> the target type (output)
022 */
023public interface Coercion<S, T>
024{
025    /**
026     * Converts an input value.
027     *
028     * @param input the input value
029     */
030    T coerce(S input);
031}