public FluidRecipe(String researchKey, FluidStack result, Object cat, AspectList tags)
	  {
	    this.recipeOutput = result;
	    this.aspects = tags;
	    this.key = researchKey;
	    this.catalyst = cat;
	    if ((cat instanceof String)) {
	      this.catalyst = OreDictionary.getOres((String)cat);
	    }
	    String hc = researchKey + result.toString();
	    for (Aspect tag : tags.getAspects()) {
	      hc = hc + tag.getTag() + tags.getAmount(tag);
	    }
	    if ((cat instanceof ItemStack)) {
	      hc = hc + ((ItemStack)cat).toString();
	    } else if (((cat instanceof ArrayList)) && (((ArrayList)this.catalyst).size() > 0)) {
	      for (ItemStack is : (ArrayList)this.catalyst) { //ERROR HERE
	        hc = hc + is.toString();
	      }
	    }
	    this.hash = hc.hashCode();
	  }