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
015package org.apache.tapestry5.ioc.annotations;
016
017import java.lang.annotation.Documented;
018import static java.lang.annotation.ElementType.FIELD;
019import static java.lang.annotation.ElementType.PARAMETER;
020import java.lang.annotation.Retention;
021import static java.lang.annotation.RetentionPolicy.RUNTIME;
022import 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)
037public @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}