// In line decoding and handling of the packet
@Override
protected void decode(ChannelHandlerContext ctx, FMLProxyPacket msg, List<Object> out)
throws Exception {
ByteBuf payload = msg.payload();
byte discriminator = payload.readByte();
Class<? extends AbstractPacket> clazz = this.packets.get(discriminator);
if (clazz == null) {
throw new NullPointerException("No packet registered for discriminator: " + discriminator);
}
AbstractPacket pkt = clazz.newInstance();
pkt.decodeInto(ctx, payload.slice());
EntityPlayer player;
switch (FMLCommonHandler.instance().getEffectiveSide()) {
case CLIENT:
player = this.getClientPlayer();
pkt.handleClientSide(player);
break;
case SERVER:
INetHandler netHandler = ctx.channel().attr(NetworkRegistry.NET_HANDLER).get();
player = ((NetHandlerPlayServer) netHandler).playerEntity;
pkt.handleServerSide(player);
break;
default:
}
out.add(pkt);
}
// In line encoding of the packet, including discriminator setting
@Override
protected void encode(ChannelHandlerContext ctx, AbstractPacket msg, List<Object> out)
throws Exception {
ByteBuf buffer = Unpooled.buffer();
Class<? extends AbstractPacket> clazz = msg.getClass();
if (!this.packets.contains(msg.getClass())) {
throw new NullPointerException(
"No Packet Registered for: " + msg.getClass().getCanonicalName());
}
byte discriminator = (byte) this.packets.indexOf(clazz);
buffer.writeByte(discriminator);
msg.encodeInto(ctx, buffer);
FMLProxyPacket proxyPacket =
new FMLProxyPacket(buffer.copy(), ctx.channel().attr(NetworkRegistry.FML_CHANNEL).get());
out.add(proxyPacket);
}
/**
* 申请一个 指定类型的空包。
*
* @param clazz
*/
@SuppressWarnings("unchecked")
public static <E> E newPacket(Class<? extends IPacket> clazz) {
int packetId = Singleton.INSTANCE.getPacketId(clazz);
if (packetId > 0) {
try {
AbstractPacket newInstance = (AbstractPacket) clazz.newInstance();
newInstance.setPacketId(packetId);
// TODO 根据PacketId 编号，决定数据包类型
return (E) newInstance;
} catch (InstantiationException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
}
}
return null;
}
