utils/osgi/src/main/java/org/onlab/osgi/ServiceDirectory.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.onlab.osgi;

/**
 * Simple abstraction of a service directory where service implementations can
 * be found by the class name of the interfaces they provide.
 */
public interface ServiceDirectory {

    /**
     * Returns implementation of the specified service class.
     * @param serviceClass service class
     * @param <T> type of service
     * @return implementation class
     * @throws ServiceNotFoundException if no implementation found
     */
    <T> T get(Class<T> serviceClass);

}