| /* |
| * Copyright 2014-present Open Networking Foundation |
| * |
| * 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.onlab.packet; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| /** |
| * Base packet class. |
| */ |
| public abstract class BasePacket implements IPacket { |
| |
| protected IPacket parent; |
| protected IPacket payload; |
| |
| @Override |
| public IPacket getParent() { |
| return this.parent; |
| } |
| |
| @Override |
| public IPacket setParent(final IPacket parent) { |
| this.parent = parent; |
| return this; |
| } |
| |
| @Override |
| public IPacket getPayload() { |
| return this.payload; |
| } |
| |
| @Override |
| public IPacket setPayload(final IPacket payload) { |
| this.payload = payload; |
| return this; |
| } |
| |
| @Override |
| public void resetChecksum() { |
| if (this.parent != null) { |
| this.parent.resetChecksum(); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 6733; |
| int result = 1; |
| result = prime * result |
| + (this.payload == null ? 0 : this.payload.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(final Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (!(obj instanceof BasePacket)) { |
| return false; |
| } |
| final BasePacket other = (BasePacket) obj; |
| if (this.payload == null) { |
| if (other.payload != null) { |
| return false; |
| } |
| } else if (!this.payload.equals(other.payload)) { |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * This implementation of clone() is here to preserve backwards compatibility. Applications should not |
| * use clone() and instead use the duplicate() methods on the packet classes. |
| * |
| * @return copy of packet |
| */ |
| @Override |
| public Object clone() { |
| |
| Class<? extends BasePacket> packetClass = this.getClass(); |
| Method[] allMethods = packetClass.getDeclaredMethods(); |
| |
| Method deserializerFactory = null; |
| for (Method m : allMethods) { |
| String mname = m.getName(); |
| if (mname.equals("deserializer")) { |
| deserializerFactory = m; |
| break; |
| } |
| } |
| |
| if (deserializerFactory == null) { |
| throw new IllegalStateException("No Deserializer found for " + packetClass.getName()); |
| } |
| |
| byte[] data = serialize(); |
| try { |
| Deserializer deserializer = (Deserializer) deserializerFactory.invoke(this); |
| return deserializer.deserialize(data, 0, data.length); |
| } catch (IllegalAccessException | InvocationTargetException | DeserializationException ex) { |
| throw new IllegalStateException(ex); |
| } |
| |
| } |
| } |