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.
014package org.apache.tapestry5.ioc.annotations;
015
016import java.lang.annotation.Documented;
017import java.lang.annotation.Retention;
018import java.lang.annotation.Target;
019
020import static java.lang.annotation.ElementType.METHOD;
021import static java.lang.annotation.RetentionPolicy.RUNTIME;
022
023/**
024 * An annotation that may be placed on a contributor method of a module. The annotation may/should be used in combination with
025 * {@link Marker} annotation to disambiguate the service to contribute into. This annotation was introduced as an alternative
026 * to the naming convention for contributor methods.
027 *
028 * @see Optional
029 * @since 5.2.0
030 */
031@Target(METHOD)
032@Retention(RUNTIME)
033@Documented
034public @interface Contribute
035{
036    /**
037     * Type of the service to contribute into.
038     */
039    Class value();
040}