| /* |
| * Copyright 2015-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.onosproject.net.driver; |
| |
| import static com.google.common.base.Preconditions.checkState; |
| |
| /** |
| * Base implementation of a driver handler behaviour. |
| */ |
| public class AbstractHandlerBehaviour |
| extends AbstractBehaviour implements HandlerBehaviour { |
| |
| private DriverHandler handler; |
| |
| @Override |
| public DriverHandler handler() { |
| return handler; |
| } |
| |
| @Override |
| public void setHandler(DriverHandler handler) { |
| checkState(this.handler == null, "Driver handler already set"); |
| this.handler = handler; |
| } |
| } |