Object obj = 123; // Integer
        assertThrows(PACDecodingException.class, () -> {
            ASN1Util.as(String.class, obj);
        }, "Should throw PACDecodingException for incompatible types");
    }

    // --- as(Class, Enumeration) ---

    @Test
    void testAs_Enumeration_Success() throws PACDecodingException {
        // Test successful casting from enumeration

{* ../../docs_src/body/tutorial001.py hl[18] *}

...et déclarez que son type est le modèle que vous avez créé : `Item`.

## Résultats

En utilisant uniquement les déclarations de type Python, **FastAPI** réussit à :

* Lire le contenu de la requête en tant que JSON.
* Convertir les types correspondants (si nécessaire).
* Valider la donnée.

///

## Usar `Annotated` en el tipo del parámetro `q` { #use-annotated-in-the-type-for-the-q-parameter }

¿Recuerdas que te dije antes que `Annotated` puede usarse para agregar metadatos a tus parámetros en la [Introducción a Tipos de Python](../python-types.md#type-hints-with-metadata-annotations){.internal-link target=_blank}?

Ahora es el momento de usarlo con FastAPI. 🚀

    command: Annotated[str | None, typer.Option(envvar="COMMAND")] = None,
    github_token: Annotated[str, typer.Option(envvar="GITHUB_TOKEN")],
    github_repository: Annotated[str, typer.Option(envvar="GITHUB_REPOSITORY")],
) -> None:
    print("Setting up GitHub Actions git user")
    repo = git.Repo(Path(__file__).absolute().parent.parent)
    if not repo.is_dirty(untracked_files=True):

      if (types.length > 0 && mayNeedHiddenThis()) {
        Class<?>[] rawParamTypes = constructor.getParameterTypes();
        if (types.length == rawParamTypes.length
            && rawParamTypes[0] == getDeclaringClass().getEnclosingClass()) {
          // first parameter is the hidden 'this'
          return Arrays.copyOfRange(types, 1, types.length);
        }
      }
      return types;

 * (also known as a MIME Type or Content Type). This class also supports the concept of media ranges
 * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1">defined by HTTP/1.1</a>.
 * As such, the {@code *} character is treated as a wildcard and is used to represent any acceptable
 * type or subtype value. A media type may not have wildcard type with a declared subtype. The

import jakarta.annotation.PostConstruct;

/**
 * Helper class for managing file type mappings based on MIME types.
 * This class provides functionality to map MIME types to file types and
 * retrieve appropriate file type classifications for documents during indexing.
 *
 * The mappings are loaded from configuration and can be dynamically modified
 * at runtime. When a MIME type is not found in the mapping, a default value
 * is returned.
 */

 * (also known as a MIME Type or Content Type). This class also supports the concept of media ranges
 * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.1">defined by HTTP/1.1</a>.
 * As such, the {@code *} character is treated as a wildcard and is used to represent any acceptable
 * type or subtype value. A media type may not have wildcard type with a declared subtype. The

the operation would become deadlocked if the channels are full.

### Typed handlers

Typed handlers are handlers that have a specific type for the request and response payloads.

```go
    // Create a typed handler.
    handler := func(ctx context.Context, p *Payload, in <-chan *Req, out chan<- *Resp) *RemoteErr {

      }

      private /*static*/ <S> S doConvert(TypeToken<S> type) {
        return checkNotNull(getDefaultValue(type));
      }
    };
  }

  private static TypeToken<?> getFirstTypeParameter(Type type) {
    if (type instanceof ParameterizedType) {
      return TypeToken.of(((ParameterizedType) type).getActualTypeArguments()[0]);
    } else {
      return TypeToken.of(Object.class);
    }