org.osgi.service.component.annotations.ReferenceCardinality Maven / Gradle / Ivy
/*
* Copyright (c) OSGi Alliance (2011, 2013). 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.
*
*
* Specifies if the reference is optional and if the component implementation
* support a single bound service or multiple bound services.
*
* @author $Id: f01a55c3ea006d931dd3f066605da80b78c8bd9e $
*/
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");
private final String value;
ReferenceCardinality(String value) {
this.value = value;
}
@Override
public String toString() {
return value;
}
}