ShapelessCuttingRecipe.java

package choonster.testmod3.recipe;

import net.minecraft.inventory.InventoryCrafting;
import net.minecraft.item.ItemAxe;
import net.minecraft.item.ItemStack;
import net.minecraft.item.crafting.ShapelessRecipes;
import net.minecraft.util.NonNullList;
import net.minecraftforge.common.ForgeHooks;
import net.minecraftforge.event.ForgeEventFactory;

import java.util.Arrays;
import java.util.Random;

/**
 * A shapeless recipe that damages any {@link ItemAxe} ingredients.
 *
 * @author Choonster
 */
public class ShapelessCuttingRecipe extends ShapelessRecipes {
	private final Random random = new Random();

	public ShapelessCuttingRecipe(ItemStack output, ItemStack... input) {
		super(output, Arrays.asList(input));
	}

	private ItemStack damageAxe(ItemStack stack) {
		if (stack.attemptDamageItem(1, random)) {
			ForgeEventFactory.onPlayerDestroyItem(ForgeHooks.getCraftingPlayer(), stack, null);
			return ItemStack.EMPTY;
		}

		return stack;
	}

	@Override
	public NonNullList<ItemStack> getRemainingItems(InventoryCrafting inventoryCrafting) {
		final NonNullList<ItemStack> remainingItems = NonNullList.withSize(inventoryCrafting.getSizeInventory(), ItemStack.EMPTY);

		for (int i = 0; i < remainingItems.size(); ++i) {
			final ItemStack itemstack = inventoryCrafting.getStackInSlot(i);

			if (!itemstack.isEmpty() && itemstack.getItem() instanceof ItemAxe) {
				remainingItems.set(i, damageAxe(itemstack.copy()));
			} else {
				remainingItems.set(i, ForgeHooks.getContainerItem(itemstack));
			}
		}

		return remainingItems;
	}
}