utils/rest/src/main/java/org/onlab/rest/BaseResource.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.rest;

import org.onlab.osgi.DefaultServiceDirectory;
import org.onlab.osgi.ServiceDirectory;

/**
 * Base abstraction of a JAX-RS resource.
 */
public abstract class BaseResource {

    private static ServiceDirectory services = new DefaultServiceDirectory();

    /**
     * Sets alternate service directory to be used for lookups.
     * <p>
     * Intended to ease unit testing and not intended for use in production.
     * </p>
     *
     * @param serviceDirectory alternate service directory
     */
    public static void setServiceDirectory(ServiceDirectory serviceDirectory) {
        services = serviceDirectory;
    }

    /**
     * Returns reference to the specified service implementation.
     *
     * @param service service class
     * @param <T>     type of service
     * @return service implementation
     */
    protected static <T> T get(Class<T> service) {
        return services.get(service);
    }

}