001//  Copyright 2008, 2009 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.annotations;
016
017import java.lang.annotation.*;
018
019/**
020 * A documentation-only interface placed on service interfaces for services which have a {@linkplain
021 * org.apache.tapestry5.ioc.MappedConfiguration mapped configuration}, to identify the type of key (often, a String),
022 * and type ofcontribution.
023 * <p/>
024 * Remember that when the key type is String, the map will be case-insensitive.
025 */
026@Target(ElementType.TYPE)
027@Retention(RetentionPolicy.CLASS)
028@Documented
029@UseWith(AnnotationUseContext.SERVICE)
030public @interface UsesMappedConfiguration
031{
032    /**
033     * The type of key used to identify contribution values.
034     */
035    Class key() default String.class;
036
037    /**
038     * The type of object which may be contributed into the service's configuration.
039     */
040    Class value();
041}