001    // Copyright 2010 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;
015    
016    import java.util.Set;
017    
018    import org.apache.tapestry5.ioc.def.ServiceDef;
019    
020    
021    /**
022     * Interface implemented by objects which need to disambiguate services with marker annotations.
023     *
024     * @since 5.2.2
025     */
026    public interface Markable
027    {
028        /**
029         * Returns an optional set of <em>marker annotation</em>. Marker annotations are used to disambiguate services; the
030         * combination of a marker annotation and a service type is expected to be unique. Note that it is not possible
031         * to identify which annotations are markers and which are not when this set is constructed, so it may include
032         * non-marker annotations.
033         *
034         * @see ServiceDef#getMarkers()
035         */
036        Set<Class> getMarkers();
037    
038        /**
039         * Returns the service interface associated with the service.
040         *
041         * @see ServiceDef#getServiceInterface()
042         */
043        Class getServiceInterface();
044    }