| /* |
| * Copyright (c) 2009, Rickard Öberg. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.qi4j.api.service.qualifier; |
| |
| import java.lang.annotation.Retention; |
| import java.lang.annotation.RetentionPolicy; |
| import org.qi4j.api.service.ServiceReference; |
| import org.qi4j.functional.Specification; |
| |
| /** |
| * Filter services based on whether they are active or not. |
| * <p> |
| * At an injection point you can do this: |
| * </p> |
| * <pre><code> |
| * @Service @Active MyService service; |
| * </code></pre> |
| * <p> |
| * to get only a service that is currently active. |
| * </p> |
| */ |
| @Retention( RetentionPolicy.RUNTIME ) |
| @Qualifier( Active.ActiveQualifier.class ) |
| public @interface Active |
| { |
| /** |
| * Active Annotation Qualifier. |
| * See {@link Active}. |
| */ |
| public final class ActiveQualifier |
| implements AnnotationQualifier<Active> |
| { |
| @Override |
| public <T> Specification<ServiceReference<?>> qualifier( Active active ) |
| { |
| return ServiceQualifier.whereActive(); |
| } |
| } |
| } |