Java tutorial
/* * Copyright (c) 2013 Pantheon Technologies s.r.o. 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.openflowjava.protocol.impl.deserialization.factories; import io.netty.buffer.ByteBuf; import org.opendaylight.openflowjava.protocol.impl.deserialization.OFDeserializer; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessage; import org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.protocol.rev130731.HelloMessageBuilder; /** * Translates Hello messages (OpenFlow v1.0) * @author michal.polkorab */ public class OF10HelloMessageFactory implements OFDeserializer<HelloMessage> { private static OF10HelloMessageFactory instance; private OF10HelloMessageFactory() { // do nothing, just singleton } /** * @return singleton factory */ public static synchronized OF10HelloMessageFactory getInstance() { if (instance == null) { instance = new OF10HelloMessageFactory(); } return instance; } @Override public HelloMessage bufferToMessage(ByteBuf rawMessage, short version) { HelloMessageBuilder builder = new HelloMessageBuilder(); builder.setVersion(version); builder.setXid(rawMessage.readUnsignedInt()); if (rawMessage.readableBytes() > 0) { rawMessage.skipBytes(rawMessage.readableBytes()); } return builder.build(); } }