@Override
 public void readFromByteBuff(ByteBuf buf) {
   super.readFromByteBuff(buf);
   fill = buf.readBoolean();
   tank.readFromByteBuff(buf);
   inventory.readFromByteBuff(buf);
 }
 @Override
 public void writeToNBT(NBTTagCompound nbtTagCompound) {
   super.writeToNBT(nbtTagCompound);
   nbtTagCompound.setBoolean("fill", fill);
   inventory.writeToNBT(nbtTagCompound);
   nbtTagCompound.setTag("tank", tank.writeToNBT(new NBTTagCompound()));
 }
 @Override
 public void writeToByteBuff(ByteBuf buf) {
   super.writeToByteBuff(buf);
   buf.writeBoolean(fill);
   tank.writeToByteBuff(buf);
   inventory.writeToByteBuff(buf);
 }
 @Override
 public void readFromNBT(NBTTagCompound nbtTagCompound) {
   super.readFromNBT(nbtTagCompound);
   fill = nbtTagCompound.getBoolean("fill");
   inventory.readFromNBT(nbtTagCompound);
   if (nbtTagCompound.hasKey("tank", Constants.NBT.TAG_COMPOUND))
     tank.readFromNBT(nbtTagCompound.getCompoundTag("tank"));
 }
  @Override
  public void updateEntity() {
    super.updateEntity();
    if (worldObj.isRemote) return;
    ItemStack stack = inventory.getStackInSlot(0);
    if (stack != null) {
      Item stackItem = stack.getItem();
      if (stackItem instanceof IFluidContainerItem) {
        IFluidContainerItem iFluidContainerItem = (IFluidContainerItem) stackItem;
        if (fill) {
          if (!tank.isEmpty()) {
            int amount = 128;
            if (tank.getFluidAmount() < amount) amount = tank.getFluidAmount();
            if (energy >= amount) {
              drain(
                  ForgeDirection.UNKNOWN,
                  iFluidContainerItem.fill(stack, new FluidStack(tank.getFluid(), amount), true),
                  true);
              energy -= amount;
            }
          }
        } else {
          FluidStack contained = iFluidContainerItem.getFluid(stack);
          if (!fill && !tank.isFull() && contained != null && contained.amount > 0) {
            int amount = 64;
            if (tank.getFreeSpace() < amount) amount = tank.getFreeSpace();
            if (amount > contained.amount) amount = contained.amount;
            iFluidContainerItem.drain(
                stack, fill(ForgeDirection.UNKNOWN, new FluidStack(contained, amount), true), true);
          }
        }
      } else if (FluidContainerRegistry.isContainer(stack)) {
        if (fill) {
          if (!tank.isEmpty()) {
            int amount = FluidContainerRegistry.getContainerCapacity(tank.getFluid(), stack);
            if (amount > 0 && energy >= amount && tank.getFluidAmount() >= amount) {
              ItemStack filledContainer =
                  FluidContainerRegistry.fillFluidContainer(
                      new FluidStack(tank.getFluid(), amount), stack);
              if (filledContainer != null
                  && filledContainer.getItem() != null
                  && filledContainer.stackSize > 0) {
                energy -= amount;
                drain(ForgeDirection.UNKNOWN, amount, true);
                inventory.setInventorySlotContents(0, filledContainer.copy());
              }
            }
          }
        } else {
          FluidStack contained = FluidContainerRegistry.getFluidForFilledItem(stack);
          if (contained != null
              && contained.amount > 0
              && tank.getFreeSpace() >= contained.amount) {
            if (fill(ForgeDirection.UNKNOWN, contained, false) == contained.amount) {
              fill(ForgeDirection.UNKNOWN, contained, true);
              ItemStack drainedContainer = FluidContainerRegistry.drainFluidContainer(stack);
              if (drainedContainer != null
                  && drainedContainer.getItem() != null
                  && drainedContainer.stackSize > 0)
                inventory.setInventorySlotContents(0, drainedContainer.copy());
            }
          }
        }
      }

      if (getProgress() >= 16) {
        stack = getStackInSlot(0);
        if (stack != null) {
          ItemStack outputStack = getStackInSlot(1);
          if (outputStack == null || outputStack.getItem() == null || outputStack.stackSize <= 0) {
            ItemStack copyStack = stack.copy();
            copyStack.stackSize = 1;
            inventory.setInventorySlotContents(1, copyStack);
            inventory.decrStackSize(0, 1);
          }
        }
      }
    }
  }