| /* |
| * Copyright 2016-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.provider.of.message.impl; |
| |
| import com.google.common.collect.BiMap; |
| import com.google.common.collect.EnumHashBiMap; |
| import org.onosproject.cpman.ControlMessage; |
| import org.projectfloodlight.openflow.protocol.OFType; |
| |
| import static org.projectfloodlight.openflow.protocol.OFType.*; |
| import static org.onosproject.cpman.ControlMessage.Type.*; |
| |
| /** |
| * Collection of helper methods to convert protocol agnostic control message to |
| * messages used in OpenFlow specification. |
| */ |
| public final class OpenFlowControlMessageMapper { |
| |
| // prohibit instantiation |
| private OpenFlowControlMessageMapper() { |
| } |
| |
| private static final BiMap<OFType, ControlMessage.Type> MESSAGE_TYPE = |
| EnumHashBiMap.create(OFType.class); |
| |
| static { |
| // key is OpenFlow specific OFType |
| // value is protocol agnostic ControlMessage.Type |
| MESSAGE_TYPE.put(PACKET_IN, INBOUND_PACKET); |
| MESSAGE_TYPE.put(PACKET_OUT, OUTBOUND_PACKET); |
| MESSAGE_TYPE.put(FLOW_MOD, FLOW_MOD_PACKET); |
| MESSAGE_TYPE.put(FLOW_REMOVED, FLOW_REMOVED_PACKET); |
| MESSAGE_TYPE.put(STATS_REQUEST, REQUEST_PACKET); |
| MESSAGE_TYPE.put(STATS_REPLY, REPLY_PACKET); |
| } |
| |
| /** |
| * Looks up the specified input value to the corresponding value with the specified map. |
| * |
| * @param map bidirectional mapping |
| * @param input input type |
| * @param cls class of output value |
| * @param <I> type of input value |
| * @param <O> type of output value |
| * @return the corresponding value stored in the specified map |
| */ |
| private static <I, O> O lookup(BiMap<I, O> map, I input, Class<O> cls) { |
| if (!map.containsKey(input)) { |
| throw new RuntimeException( |
| String.format("No mapping found for %s when converting to %s", |
| input, cls.getName())); |
| } |
| return map.get(input); |
| } |
| |
| /** |
| * Looks up the corresponding {@link ControlMessage.Type} instance |
| * from the specified OFType value for OpenFlow message type. |
| * |
| * @param type OpenFlow message type |
| * @return protocol agnostic control message type |
| */ |
| public static ControlMessage.Type lookupControlMessageType(OFType type) { |
| return lookup(MESSAGE_TYPE, type, ControlMessage.Type.class); |
| } |
| |
| /** |
| * Looks up the corresponding {@link OFType} instance from the specified |
| * ControlMetricType value. |
| * |
| * @param type control message type |
| * @return OpenFlow specific message type |
| */ |
| public static OFType lookupOFType(ControlMessage.Type type) { |
| return lookup(MESSAGE_TYPE.inverse(), type, OFType.class); |
| } |
| } |