    001// Copyright 2007, 2009, 2011 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.annotations;
    016
    017
    018import java.lang.annotation.Documented;
    019import static java.lang.annotation.ElementType.FIELD;
    020import static java.lang.annotation.ElementType.PARAMETER;
    021import java.lang.annotation.Retention;
    022import static java.lang.annotation.RetentionPolicy.RUNTIME;
    023import java.lang.annotation.Target;
    024
    025import static org.apache.tapestry5.ioc.annotations.AnnotationUseContext.*;
    026
    027import org.apache.tapestry5.ioc.annotations.Inject;
    028import org.apache.tapestry5.ioc.annotations.UseWith;
    029
    030/**
    031 * Used in conjunction with the {@link Inject} annotation to identify a service <em>by name</em> and not by type. This
    032 * is most useful when there are multiple services with the same service interface and a particular one needs to be
    033 * selected.
    034 */
    035@Target(
    036        { FIELD, PARAMETER })
    037@Documented
    038@Retention(RUNTIME)
    039@UseWith({COMPONENT,MIXIN,PAGE,SERVICE})
    040public @interface Service
    041{
    042    /**
    043     * The name of the service. Symbols will be expanded and case is not relevant.
    044     */
    045    String value();
    046}