    001// Licensed under the Apache License, Version 2.0 (the "License");
    002// you may not use this file except in compliance with the License.
    003// You may obtain a copy of the License at
    004//
    005//     http://www.apache.org/licenses/LICENSE-2.0
    006//
    007// Unless required by applicable law or agreed to in writing, software
    008// distributed under the License is distributed on an "AS IS" BASIS,
    009// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    010// See the License for the specific language governing permissions and
    011// limitations under the License.
    012
    013package org.apache.tapestry5.ioc.annotations;
    014
    015import java.lang.annotation.*;
    016
    017/**
    018 * A documentation-only interface placed on service interfaces for services which have a {@linkplain
    019 * org.apache.tapestry5.ioc.MappedConfiguration mapped configuration}, to identify the type of key (often, a String),
    020 * and type of contribution.
    021 *
    022 * Remember that when the key type is String, the map will be case-insensitive.
    023 */
    024@Target(ElementType.TYPE)
    025@Retention(RetentionPolicy.CLASS)
    026@Documented
    027@UseWith(AnnotationUseContext.SERVICE)
    028public @interface UsesMappedConfiguration
    029{
    030    /**
    031     * The type of key used to identify contribution values.
    032     */
    033    Class key() default String.class;
    034
    035    /**
    036     * The type of object which may be contributed into the service's configuration.
    037     */
    038    Class value();
    039}