Get the block drops. Works with fortune and silk touch

DropCounter3000UpdatedWizardlyBump17.java

    private static final Map<Material, BlockDrop> FIXED_BLOCKS = new HashMap<Material, BlockDrop>() {{
        put(Material.CARROT, new BlockDrop(new MaterialData(Material.CARROT_ITEM)));
        put(Material.POTATO, new BlockDrop(new MaterialData(Material.POTATO_ITEM)));
        put(Material.NETHER_WARTS, new BlockDrop(new MaterialData(Material.NETHER_STALK)));
        put(Material.COCOA, new BlockDrop(new MaterialData(Material.INK_SACK, (byte) 3)));
        put(Material.IRON_ORE, new BlockDrop(new MaterialData(Material.IRON_ORE)));
        put(Material.GOLD_ORE, new BlockDrop(new MaterialData(Material.GOLD_ORE)));
        put(Material.COAL_ORE, new BlockDrop(new MaterialData(Material.COAL), new MaterialData(Material.COAL_ORE)));
        put(Material.DIAMOND_ORE, new BlockDrop(new MaterialData(Material.DIAMOND), new MaterialData(Material.DIAMOND_ORE)));
        put(Material.EMERALD_ORE, new BlockDrop(new MaterialData(Material.EMERALD), new MaterialData(Material.EMERALD_ORE)));
        put(Material.LAPIS_ORE, new BlockDrop(new MaterialData(Material.INK_SACK, (byte) 4), new MaterialData(Material.LAPIS_ORE)));
        put(Material.REDSTONE_ORE, new BlockDrop(new MaterialData(Material.REDSTONE), new MaterialData(Material.REDSTONE_ORE)));
        put(Material.GLOWING_REDSTONE_ORE, new BlockDrop(new MaterialData(Material.REDSTONE), new MaterialData(Material.REDSTONE_ORE)));
        put(Material.QUARTZ_ORE, new BlockDrop(new MaterialData(Material.QUARTZ), new MaterialData(Material.QUARTZ_ORE)));
        put(Material.STONE, new BlockDrop(new MaterialData(Material.COBBLESTONE), new MaterialData(Material.STONE)));
    }};

    public static List<ItemStack> getDrops(Block block, ItemStack itemStack, Random random) {
        boolean silkTouch = itemStack.containsEnchantment(Enchantment.SILK_TOUCH);
        int amount = dropCount(block, silkTouch ? -1 : itemStack.getEnchantmentLevel(Enchantment.LOOT_BONUS_BLOCKS), random);
        Material type = block.getType();
        switch (type) {
            case CROPS:
                List<ItemStack> drops = new ArrayList<>(2);
                drops.add(new ItemStack(Material.WHEAT));
                drops.add(new ItemStack(Material.SEEDS, amount));
                return drops;
            case SUGAR_CANE_BLOCK:
                return Collections.singletonList(new ItemStack(Material.SUGAR_CANE));
        }
        BlockDrop drop = FIXED_BLOCKS.get(type);
        return Collections.singletonList(new ItemStack(
                silkTouch ? drop.getSilkTouchDrop().getItemType() : drop.getDrop().getItemType(),
                amount,
                silkTouch ? drop.getSilkTouchDrop().getData() : drop.getDrop().getData()));
    }

    private static int dropCount(Block block, int fortune, Random random) {
        net.minecraft.server.v1_8_R3.Block nmsBlock = CraftMagicNumbers.getBlock(block);

        if (nmsBlock instanceof BlockCrops) {
            int drops = 1;
            int j = block.getData();
            if (j >= 7) {
                int k = 3 + Math.max(fortune, 0);
                for(int l = 0; l < k; ++l)
                    if (random.nextInt(15) <= j)
                        drops++;
            }
            return drops;
        }

        if (nmsBlock instanceof BlockNetherWart) {
            int j = 1;
            if (block.getData() >= 3) {
                j = 2 + random.nextInt(3);
                if (fortune > 0)
                    j += random.nextInt(fortune + 1);
            }
            return j;
        }

        return fortune == -1 ? 1 : nmsBlock.getDropCount(fortune, random);
    }

    @Data
    @AllArgsConstructor
    static class BlockDrop {
        final MaterialData drop, silkTouchDrop;

        BlockDrop(MaterialData drop) {
            this(drop, drop);
        }
    }