} catch (Exception e) {
            throw new RuntimeException("Failed to get field value: " + fieldName, e);
        }
    }

    private void setFieldValue(Object obj, String fieldName, Object value) throws Exception {
        Field field = getField(obj.getClass(), fieldName);
        field.setAccessible(true);
        field.set(obj, value);
    }

    /**
     * Returns a {@link Map} where the keys are the type variables and the values are the type arguments
     * of the specified parameterized type (class or interface).
     *
     * @param clazz
     *            the parameterized type (class or interface) to analyze. Cannot be null.
     * @return a {@link Map} where the keys are the type variables and the values are the type arguments
     */

  public int getPortOrDefault(int defaultPort) {
    return hasPort() ? port : defaultPort;
  }

  /**
   * Build a HostAndPort instance from separate host and port values.
   *
   * <p>Note: Non-bracketed IPv6 literals are allowed. Use {@link #requireBracketsForIPv6()} to
   * prohibit these.
   *
   * @param host the host string to parse. Must not contain a port number.

// allowedFormats determines which formats can be used.
// The value returned is the logical OR of multiple possible formats.
// If the value is FormatUnknown, then the input Header cannot be encoded
// and an error is returned explaining why.
//
// As a by-product of checking the fields, this function returns paxHdrs, which
// contain all fields that could not be directly encoded.

重要なのは、**`Annotated` の中で関数と一緒に `AfterValidator` を使うこと** だけです。この部分は飛ばしても構いません。 🤸

---

ただし、この具体的なコード例が気になっていて、まだ興味が続くなら、追加の詳細を示します。

#### `value.startswith()` を使う文字列 { #string-with-value-startswith }

気づきましたか？`value.startswith()` を使う文字列はタプルを受け取れ、そのタプル内の各値をチェックします:

{* ../../docs_src/query_params_str_validations/tutorial015_an_py310.py ln[16:19] hl[17] *}

#### ランダムなアイテム { #a-random-item }

}\n}\n\n// Helper function to get the formatted non-responsive value\n@function rfs-value($values) {\n  // Convert to list\n  $values: if(type-of($values) != list, ($values,), $values);\n\n  $val: \"\";\n\n  // Loop over each value and calculate value\n  @each $value in $values {\n    @if $value == 0 {\n      $val: $val + \" 0\";\n    }\n    @else {\n      // Cache $value unit\n      $unit: if(type-of($value) == \"number\", unit($value), false);\n\n      @if $unit == px {\n        // Convert to rem...

    }

    /**
     * Creates a new Maven-like repository system session by initializing the session with values typical for
     * Maven-based resolution. In more detail, this method configures settings relevant for the processing of dependency
     * graphs, most other settings remain at their generic default value. Use the various setters to further configure

   */
  static boolean casValue(AbstractFutureState<?> future, @Nullable Object expect, Object update) {
    return ATOMIC_HELPER.casValue(future, expect, update);
  }

  /** Returns the value of the future, using a volatile read. */
  final @Nullable Object value() {
    return valueField;
  }

  /** Returns the head of the listener stack, using a volatile read. */
  final @Nullable Listener listeners() {
    return listenersField;
  }

    }

    /**
     * Test that evaluate handles paramMap with null values
     */
    @Test
    public void test_evaluate_paramMapWithNullValues() {
        final Map<String, Object> params = new HashMap<>();
        params.put("key1", null);
        params.put("key2", "value");
        assertEquals("value", groovyEngine.evaluate("return key2", params));

    BACK {
      @Override
      <T> void insertInto(Deque<T> deque, T value) {
        deque.addLast(value);
      }
    };

    abstract <T> void insertInto(Deque<T> deque, T value);
  }