/* * 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; } }