Dispenser

BlockDispenser.dispenseBehaviorRegistry.putObject(Items.lava_bucket, behaviordefaultdispenseitem);
        BlockDispenser.dispenseBehaviorRegistry.putObject(Items.water_bucket, behaviordefaultdispenseitem);
        BlockDispenser.dispenseBehaviorRegistry.putObject(Items.bucket, new BehaviorDefaultDispenseItem()
        {
            private final BehaviorDefaultDispenseItem field_150840_b = new BehaviorDefaultDispenseItem();
            private static final String __OBFID = "CL_00001400";
            /**
             * Dispense the specified stack, play the dispense sound and spawn particles.
             */
            public ItemStack dispenseStack(IBlockSource par1IBlockSource, ItemStack par2ItemStack)
            {
                EnumFacing enumfacing = BlockDispenser.func_149937_b(par1IBlockSource.getBlockMetadata());
                World world = par1IBlockSource.getWorld();
                int i = par1IBlockSource.getXInt() + enumfacing.getFrontOffsetX();
                int j = par1IBlockSource.getYInt() + enumfacing.getFrontOffsetY();
                int k = par1IBlockSource.getZInt() + enumfacing.getFrontOffsetZ();
                Material material = world.getBlock(i, j, k).getMaterial();
                int l = world.getBlockMetadata(i, j, k);
                Item item;

                if (Material.water.equals(material) && l == 0)
                {
                    item = Items.water_bucket;
                }
                else
                {
                    if (!Material.lava.equals(material) || l != 0)
                    {
                        return super.dispenseStack(par1IBlockSource, par2ItemStack);
                    }

                    item = Items.lava_bucket;
                }

                world.setBlockToAir(i, j, k);

                if (--par2ItemStack.stackSize == 0)
                {
                    par2ItemStack.func_150996_a(item);
                    par2ItemStack.stackSize = 1;
                }
                else if (((TileEntityDispenser)par1IBlockSource.getBlockTileEntity()).func_146019_a(new ItemStack(item)) < 0)
                {
                    this.field_150840_b.dispense(par1IBlockSource, new ItemStack(item));
                }

                return par2ItemStack;
            }
        });