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

/*
 * Copyright 2014-present Open Networking Laboratory
 *
 * 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.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);

}