/*
 * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.controller.sal.dom.broker.osgi;

import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
import org.opendaylight.controller.md.sal.dom.api.DOMMountPointService;
import org.opendaylight.controller.sal.core.api.BrokerService;
import org.osgi.framework.ServiceReference;

@SuppressWarnings("unchecked")
public final class ProxyFactory {

    private ProxyFactory() {
    }

    public static <T extends BrokerService> T createProxy(final ServiceReference<T> serviceRef, final T service) {

        Object createProxyImpl = ProxyFactory.createProxyImpl(serviceRef, service);
        return (T) createProxyImpl;
    }

    private static Object createProxyImpl(final ServiceReference<?> ref, final DOMMountPointService service) {

        return new DOMMountPointServiceProxy((ServiceReference<DOMMountPointService>) ref, service);
    }

    private static DOMDataBrokerProxy createProxyImpl(final ServiceReference<?> ref, final DOMDataBroker service) {

        return new DOMDataBrokerProxy((ServiceReference<DOMDataBroker>) ref, service);
    }

    private static Object createProxyImpl(final ServiceReference<?> ref, final BrokerService service) {
        if (service == null) {
            throw new IllegalArgumentException("service can't be null");
        }

        if (service instanceof DOMDataBroker) {
            return createProxyImpl(ref, (DOMDataBroker) service);
        } else if (service instanceof DOMMountPointService) {
            return createProxyImpl(ref, (DOMMountPointService) service);
        }

        return createProxyImplFallback(ref, service);
    }

    private static Object createProxyImplFallback(final ServiceReference<?> reference, final BrokerService service) {

        return service;
    }
}