# Custom Arguments

In order to create a custom argument, you have to:

* Create the `ArgumentType<T>`.
* Create the `Argument<T>` .
* Register it in an argument registry, such as the `PaperArgumentRegistry`.

Our `T` (in this case, a record `Person`):<br>

```java
public record Person(String name, int age, String favouriteFood) {
}
```

Paper-specific example of creating the `ArgumentType<T>`:

```java
public class PersonArgumentType implements CustomArgumentType.Converted<@NotNull Person, @NotNull String> {
    @Override
    public @NotNull Person convert(@NotNull String nativeType) throws CommandSyntaxException {
        final String[] parts = nativeType.split(":");
        return new Person(parts[0], Integer.parseInt(parts[1]), parts[2]);
    }

    @Override
    public ArgumentType<String> getNativeType() {
        return StringArgumentType.greedyString();
    }
}
```

Creating the `Argument<T>`:

```java
public class PersonArgument implements Argument<PersonArgumentType> {
    @Override
    public PersonArgumentType create(Object[] options) {
        return new PersonArgumentType();
    }
}
```

Finally, registering the argument in the `PaperArgumentRegistry`:

```java
final ArgumentRegistry argumentRegistry = funmandsManager.getArgumentRegistry();

argumentRegistry.register("person", new PersonArgument());
```

Now, to use it:

```java
this.addFormat("person:person", ctx -> {
final Person person = ctx.get("person");

ctx.getExecutor().sendMessage(Component.text(person.name()));
ctx.getExecutor().sendMessage(Component.text(person.age()));
ctx.getExecutor().sendMessage(Component.text(person.favouriteFood()));
});
```


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