TileEntityAssemblyCounter

List<Integer> counted = new ArrayList(); // entityId of counted items
HashMap<int[], Integer> counter = new HashMap(); // int[]{ id, damage } => count



public Packet getDescriptionPacket() {
    NBTTagCompound nbttagcompound = new NBTTagCompound();
    writeToNBT(nbttagcompound);
    return new S35PacketUpdateTileEntity(xCoord, yCoord, zCoord, 1, nbttagcompound);
}

public void onDataPacket(NetworkManager net, S35PacketUpdateTileEntity packet) {
    if (packet.func_148857_g() == null) {
        Assembly.logger.warn("AssemblyCounter received description packet with NBT=null?! (" + packet + ")");
        return;
    }
    readFromNBT(packet.func_148857_g());
}

public void readFromNBT(NBTTagCompound nbttagcompound) {
    if (nbttagcompound == null) {
        Assembly.logger.warn("AssemblyCounter should read from null NBT ?!");
        return;
    }
    super.readFromNBT(nbttagcompound);
    NBTTagCompound nbt = nbttagcompound.getCompoundTag("counterdata");
    doublecount = nbt.getBoolean("doublecount");

    int countedsize = nbt.getInteger("countedsize");
    int countersize = nbt.getInteger("countersize");

    for (int i = 0; i < countedsize; i++) {
        counted.add(Integer.valueOf(nbt.getInteger("counted" + i)));
    }
    for (int i = 0; i < countersize; i++) {
        int id = nbt.getInteger("counter" + i + "_id");
        int damage = nbt.getInteger("counter" + i + "_damage");
        int count = nbt.getInteger("counter" + i + "_count");
        counter.put(new int[] { id, damage }, Integer.valueOf(count));
    }
}

public void writeToNBT(NBTTagCompound nbttagcompound) {
    super.writeToNBT(nbttagcompound);
    NBTTagCompound nbt = new NBTTagCompound();

    nbt.setInteger("countedsize", counted.size());
    nbt.setInteger("countersize", counter.size());
    nbt.setBoolean("doublecount", doublecount);
    for (int i = 0; i < counted.size(); i++) {
        nbt.setInteger("counted" + i, ((Integer) counted.get(i)).intValue());
    }
    Iterator it = counter.entrySet().iterator();
    int i = 0;
    while (it.hasNext()) {
        Entry<int[], Integer> entry = (Entry) it.next();
        nbt.setInteger("counter" + i + "_id", ((int[]) entry.getKey())[0]);
        nbt.setInteger("counter" + i + "_damage", ((int[]) entry.getKey())[1]);
        nbt.setInteger("counter" + i + "_count", ((Integer) entry.getValue()).intValue());
        i++;
    }
    nbttagcompound.setTag("counterdata", nbt);
}