gistfile1.java

public class PacketHandler implements IPacketHandler {

	@Override
	public void onPacketData(INetworkManager manager, Packet250CustomPayload packet, Player player) {
		ByteArrayDataInput reader = ByteStreams.newDataInput(packet.data);

		EntityPlayer entityPlayer = (EntityPlayer) player;
		
		byte packetId = reader.readByte();
		System.out.println("Packet recieved");
		switch (packetId) {
			case 0:
				int id = reader.readByte();
				ItemStack is = entityPlayer.getCurrentEquippedItem();
				
				if (is == null || !(is.getItem() instanceof ItemLinkHolder)) return;
				
				ItemLinkHolder item = (ItemLinkHolder) is.getItem();
				ItemStack[] items = item.getMyInventory(is);
					
				if (items[id] == null || !(items[id].getItem() instanceof ItemLinkbook)) return;
				
				ItemLinkbook link = (ItemLinkbook) items[id].getItem();
				link.activate(is, entityPlayer.worldObj, entityPlayer);
				
				break;
		}
	}
	
	public static void sendActivatePacket(byte id) {
		
		ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
		DataOutputStream dataStream = new DataOutputStream(byteStream);
		
		try {
			dataStream.writeByte(0);
			dataStream.writeByte(id);
			
			System.out.println("Packet Sent");
			PacketDispatcher.sendPacketToServer(PacketDispatcher.getPacket(ModInfo.Channel, byteStream.toByteArray()));
		} catch (IOException e) {
			System.err.append("Failed to send activate packet");
		}
		
	}

}