001    // Copyright 2006, 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.Documented;
018    import static java.lang.annotation.ElementType.FIELD;
019    import static java.lang.annotation.ElementType.PARAMETER;
020    import java.lang.annotation.Retention;
021    import static java.lang.annotation.RetentionPolicy.RUNTIME;
022    import java.lang.annotation.Target;
023    
024    
025    /**
026     * Annotation used with parameters of service builder methods to identify the service to be injected into the service
027     * builder method via the parameter. In many cases the {@link org.apache.tapestry5.ioc.annotations.Inject} annotation is
028     * more flexible or appropriate.
029     * <p/>
030     * This annotation may also be used with fields of service implementation classes, modules, or other objects constructed
031     * via {@link org.apache.tapestry5.ioc.ObjectLocator#autobuild(Class)}.
032     */
033    @Target({PARAMETER, FIELD})
034    @Retention(RUNTIME)
035    @Documented
036    @UseWith(AnnotationUseContext.SERVICE)
037    public @interface InjectService
038    {
039    
040        /**
041         * The id of the service to inject; either a fully qualified id, or the unqualified id of a service within the same
042         * module.
043         */
044        String value();
045    }