Entry<E> entry = entryIterator.next();
          element = entry.getElement();
          remaining = entry.getCount();
        }
        remaining--;
        /*
         * requireNonNull is safe because `remaining` starts at 0, forcing us to initialize
         * `element` above. After that, we never clear it.
         */
        return requireNonNull(element);
      }
    };
  }

<img src="/img/tutorial/security/image10.png">

/// note | Remarque

Remarquez l'en-tête `Authorization`, avec une valeur qui commence par `Bearer `.

///

## Utilisation avancée avec `scopes` { #advanced-usage-with-scopes }

OAuth2 comporte la notion de « scopes ».

Vous pouvez les utiliser pour ajouter un ensemble spécifique d'autorisations à un jeton JWT.

 * and elevate word settings.</p>
 *
 * <p>It also includes a nested TimeoutSettings class to manage various timeout configurations.</p>
 *
 * <p>Usage example:</p>
 * <pre>
 * {@code
 * Client client = ...;
 * Map<String, Object> initialSettings = ...;
 * SuggestSettings.TimeoutSettings timeoutSettings = new SuggestSettings.TimeoutSettings();

There are some additional dependencies you might want to install.

Additional optional Pydantic dependencies:

* [`pydantic-settings`](https://docs.pydantic.dev/latest/usage/pydantic_settings/) - for settings management.
* [`pydantic-extra-types`](https://docs.pydantic.dev/latest/usage/types/extra_types/extra_types/) - for extra types to be used with Pydantic.

Additional optional FastAPI dependencies:

      throw new IllegalArgumentException(e);
    }

    boolean empty;
    if (effectiveRange.isEmpty()) {
      empty = true;
    } else {
      /*
       * requireNonNull is safe because the effectiveRange operations above would have thrown or
       * effectiveRange.isEmpty() would have returned true.
       */
      C afterLower = requireNonNull(range.lowerBound.leastValueAbove(domain));

        }
      }
    } finally {
      if (interrupted) {
        Thread.currentThread().interrupt();
      }
    }
    return added;
  }

  /**
   * Returns a synchronized (thread-safe) queue backed by the specified queue. In order to guarantee
   * serial access, it is critical that <b>all</b> access to the backing queue is accomplished
   * through the returned queue.
   *

      @SuppressWarnings("rawtypes") // JDT-based J2KT Java frontend does not permit the direct cast
      Map rawMap = map;
      @SuppressWarnings("unchecked") // covariant casts safe (unmodifiable)
      ImmutableClassToInstanceMap<B> cast = (ImmutableClassToInstanceMap<B>) rawMap;
      return cast;
    }
    return new Builder<B>().putAll(map).build();
  }

///

## 與 OpenAPI 整合 { #integrated-with-openapi }

你的依賴（以及其子依賴）所宣告的所有請求參數、驗證與需求，都會整合進同一份 OpenAPI 結構中。

因此，互動式文件也會包含來自這些依賴的所有資訊：

<img src="/img/tutorial/dependencies/image01.png">

## 簡單用法 { #simple-usage }

想一想，「路徑操作函式」是宣告好讓框架在「路徑」與「操作」符合時使用的，然後 **FastAPI** 會負責帶入正確的參數、從請求中擷取資料，並呼叫該函式。

其實，所有（或大多數）Web 框架都是這樣運作。

你從不會直接呼叫這些函式。它們是由框架（此處是 **FastAPI**）呼叫的。

 * <p>Data stores are registered by name and class name, allowing flexible lookup.
 * The factory also supports dynamic discovery of data store plugins by scanning
 * JAR files for data store configurations.</p>
 *
 * <p>Thread-safe operations are supported for registration and retrieval of data stores.
 * The factory caches data store names with a time-based refresh mechanism to improve
 * performance while ensuring up-to-date plugin discovery.</p>
 */

   * {@link Reader} classes and Java versions, but both methods read the entire input into memory
   * immediately, so we discourage use of both when memory usage is a concern.
   *
   * @param r the object to read from
   * @return a mutable {@link List} containing all the lines
   * @throws IOException if an I/O error occurs
   */