Recipe arguments

The RecipeArgument class lets you retrieve Bukkit's Recipe object. Unlike the other arguments, this argument has a slightly different implementation for Minecraft 1.15+.

Developer's Note:

In Minecraft 1.15 and onwards, Bukkit now has the ComplexRecipe class. This class is a subclass of the typical Recipe class, so casting still works when casting to Recipe. The only major difference is the ComplexRecipe class also inherits the Keyed interface, allowing you to access its NamespacedKey. This is used to grant the recipe to players. (This is shown in the second example below).

Example - Giving a player the result of a recipe

Say we want to give youself the result of a specific recipe. Since Bukkit's Recipe class contains the getResult() method, we will use that in our example. We want to create the following command:

/giverecipe <recipe>

As such, we easily implement it by specifying the RecipeArgument, casting it and adding it to the player's inventory:

LinkedHashMap<String, Argument> arguments = new LinkedHashMap<>();
arguments.put("recipe", new RecipeArgument());

new CommandAPICommand("giverecipe")
    .executesPlayer((player, args) -> {
        Recipe recipe = (Recipe) args[0];

Example - Unlocking a recipe for a player (1.15+ only)

Since 1.15 has the ComplexRecipe class, we will take advantage of this to unlock a recipe for a player. For this command, we'll use the following structure:

/unlockrecipe <player> <recipe>

Since the discoverRecipe(NamespacedKey) method for a player requires a NamespacedKey, we have to ensure that this recipe is of type ComplexRecipe. This is simply done by using instanceof. If this is the case, then we can unlock the recipe for the player. Otherwise, we cannot, so we fail gracefully using the method;

LinkedHashMap<String, Argument> arguments = new LinkedHashMap<>();
arguments.put("player", new PlayerArgument());
arguments.put("recipe", new RecipeArgument());

new CommandAPICommand("unlockrecipe")
    .executes((sender, args) -> {
        Player target = (Player) args[0];
        Recipe recipe = (Recipe) args[1];
        //Check if we're running 1.15+
        if(recipe instanceof ComplexRecipe) {
            ComplexRecipe complexRecipe = (ComplexRecipe) recipe;
        } else {
            //Error here, can't unlock recipe for player
  "Cannot unlock recipe for player (Are you using version 1.15 or above?)");