ModContainerItem.java

package com.minetronic.masterchef.items;

import net.minecraft.entity.LivingEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.world.World;

/**
 * The containerItem is an item which returns a specified Item after it has been used
 */
public class ModContainerItem extends ModItem {

    private Item containerItem;

    public ModContainerItem(Item.Properties properties, Item containerItem) {
        super(properties.containerItem(containerItem));
        this.containerItem = containerItem;
    }

    /**
     * Called when the player finishes using this Item (E.g. finishes eating.). Not called when the player stops using
     * the Item before the action is complete.
     */
    public ItemStack onItemUseFinish(ItemStack stack, World worldIn, LivingEntity entityLiving) {
        ItemStack itemstack = super.onItemUseFinish(stack, worldIn, entityLiving);
        if (entityLiving instanceof PlayerEntity) {
            PlayerEntity player = ((PlayerEntity) entityLiving);
            if (!player.abilities.isCreativeMode) {
                ItemStack containerItemStack = new ItemStack(containerItem);
                if (itemstack.isEmpty()) {
                    System.out.println("Has itemstack: " + player.inventory.hasItemStack(containerItemStack));
                    System.out.println("Stackable: " + containerItemStack.isStackable());
                    if (containerItemStack.isStackable() && player.inventory.hasItemStack(containerItemStack)) {
                        if (!player.addItemStackToInventory(containerItemStack)) {
                            return containerItemStack;
                        }
                    } else {
                        return containerItemStack;
                    }
                } else {
                    player.addItemStackToInventory(new ItemStack(containerItem));
                    return itemstack;
                }
            }
        }
        return itemstack;
    }
}