    001    // Copyright 2007, 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.ioc;
    016
    017    import java.lang.annotation.Annotation;
    018
    019    /**
    020     * A source of annotations. This interface is used to mask where the annotations come from (for example, from a Method,
    021     * a Class, or some other source).
    022     */
    023    public interface AnnotationProvider
    024    {
    025        /**
    026         * Searches for the specified annotation, returning the matching annotation instance.
    027         *
    028         * @param <T>
    029         * @param annotationClass used to select the annotation to return
    030         * @return the annotation, or null if not found
    031         */
    032        <T extends Annotation> T getAnnotation(Class<T> annotationClass);
    033    }