BloodMagic/1.7.2/main/java/WayofTime/alchemicalWizardry/common/LifeBucketHandler.java

package WayofTime.alchemicalWizardry.common;

import net.minecraft.block.Block;
import net.minecraft.item.ItemStack;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.world.World;
import net.minecraftforge.event.entity.player.FillBucketEvent;
import WayofTime.alchemicalWizardry.ModBlocks;
import WayofTime.alchemicalWizardry.ModItems;
import cpw.mods.fml.common.eventhandler.Event.Result;
import cpw.mods.fml.common.eventhandler.SubscribeEvent;

public class LifeBucketHandler
{
    @SubscribeEvent
    public void onBucketFill(FillBucketEvent event)
    {
        ItemStack result = fillCustomBucket(event.world, event.target);

        if (result == null)
        {
            return;
        }

        event.result = result;
        event.setResult(Result.ALLOW);
    }

    public ItemStack fillCustomBucket(World world, MovingObjectPosition pos)
    {
        Block block = world.getBlock(pos.blockX, pos.blockY, pos.blockZ);

        if (block!=null && (block.equals(ModBlocks.blockLifeEssence)) && world.getBlockMetadata(pos.blockX, pos.blockY, pos.blockZ) == 0)
        {
            world.setBlockToAir(pos.blockX, pos.blockY, pos.blockZ);
            return new ItemStack(ModItems.bucketLife);
        } else
        {
            return null;
        }
    }
}