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    
015    package org.apache.tapestry5.ioc.annotations;
016    
017    import 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)
030    public @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    }