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    package org.apache.tapestry5.ioc.annotations;
015    
016    import java.lang.annotation.Documented;
017    import java.lang.annotation.Retention;
018    import java.lang.annotation.Target;
019    
020    import static java.lang.annotation.ElementType.METHOD;
021    import 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
034    public @interface Contribute
035    {
036        /**
037         * Type of the service to contribute into.
038         */
039        Class value();
040    }