| /* |
| * Copyright (c) OSGi Alliance (2011). 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.osgi.service.component.annotations; |
| |
| /** |
| * Cardinality for the {@link Reference} annotation. |
| * |
| * <p> |
| * Specifies if the reference is optional and if the component implementation |
| * support a single bound service or multiple bound services. |
| * |
| * @version $Id$ |
| */ |
| public enum ReferenceCardinality { |
| /** |
| * The reference is optional and unary. That is, the reference has a |
| * cardinality of {@code 0..1}. |
| */ |
| OPTIONAL, // 0..1 |
| /** |
| * The reference is mandatory and unary. That is, the reference has a |
| * cardinality of {@code 1..1}. |
| */ |
| MANDATORY, // 1..1 |
| /** |
| * The reference is optional and multiple. That is, the reference has a |
| * cardinality of {@code 0..n}. |
| */ |
| MULTIPLE, // 0..n |
| /** |
| * The reference is mandatory and multiple. That is, the reference has a |
| * cardinality of {@code 1..n}. |
| */ |
| AT_LEAST_ONE; // 1..n |
| } |