パスは最初にマッチしたものが常に使われるため、最初のものが常に使用されます。

## 定義済みの値 { #predefined-values }

*パスパラメータ*を受け取る *path operation* をもち、有効な*パスパラメータ*の値を事前に定義したい場合は、標準のPython <abbr title="Enumeration - 列挙型">`Enum`</abbr> を利用できます。

### `Enum` クラスの作成 { #create-an-enum-class }

`Enum` をインポートし、 `str` と `Enum` を継承したサブクラスを作成します。

`str` を継承することで、APIドキュメントは値が `string` 型でなければいけないことを知り、正確にレンダリングできるようになります。

そして、固定値のクラス属性を作ります。すると、その値が使用可能な値となります:

   * the JDK {@link java.util.function.Function} class, see {@link Function}.
   */
  public static Function<Object, String> toStringFunction() {
    return ToStringFunction.INSTANCE;
  }

  // enum singleton pattern
  private enum ToStringFunction implements Function<Object, String> {
    INSTANCE;

    @Override
    public String apply(Object o) {
      checkNotNull(o); // eager for GWT.
      return o.toString();
    }

import org.jspecify.annotations.NullUnmarked;

/**
 * Benchmarks for various algorithms for computing the mean and/or variance.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
public class StatsBenchmark {

  enum MeanAlgorithm {
    SIMPLE {
      @Override
      double mean(double[] values) {
        double sum = 0.0;
        for (double value : values) {
          sum += value;
        }

  @Param({"1000", "100000"})
  private int size;

  @Param WhereToDiffer whereToDiffer;

  @Param EqualsImplementation equalsImpl;

  private enum WhereToDiffer {
    ONE_PERCENT_IN,
    LAST_BYTE,
    NOT_AT_ALL;
  }

  private enum EqualsImplementation {
    ANDING_BOOLEANS {
      @Override
      boolean doEquals(byte[] a, byte[] b) {
        if (a.length != b.length) {
          return false;

import org.jspecify.annotations.NullUnmarked;

/**
 * Benchmarks for various algorithms for computing the mean and/or variance.
 *
 * @author Louis Wasserman
 */
@NullUnmarked
public class StatsBenchmark {

  enum MeanAlgorithm {
    SIMPLE {
      @Override
      double mean(double[] values) {
        double sum = 0.0;
        for (double value : values) {
          sum += value;
        }

/**
 * A type which will never be used as the element type of any collection in our tests, and so can be
 * used to test how a Collection behaves when given input of the wrong type.
 */
@GwtCompatible
public enum WrongType {
  VALUE

  }

  // In the unittest, create each ordered factory with its own set of lock
  // graph nodes (as opposed to using the static per-Enum map) to avoid
  // conflicts across different test runs.
  private <E extends Enum<E>>
      CycleDetectingLockFactory.WithExplicitOrdering<E> newInstanceWithExplicitOrdering(
          Class<E> enumClass, Policy policy) {

  }

  // In the unittest, create each ordered factory with its own set of lock
  // graph nodes (as opposed to using the static per-Enum map) to avoid
  // conflicts across different test runs.
  private <E extends Enum<E>>
      CycleDetectingLockFactory.WithExplicitOrdering<E> newInstanceWithExplicitOrdering(
          Class<E> enumClass, Policy policy) {

    @EnumSource(RequestParam.class)
    @DisplayName("send handles each RequestParam enum constant")
    void send_eachRequestParam_isAccepted(RequestParam param) throws Exception {
        // Arrange: stub per-call return to ensure interaction with the exact enum
        when(tree.send(eq(request), eq(param))).thenReturn(response);

        // Act

    }

    @Override
    protected Queue<T> delegate() {
      return mmHeap;
    }

    @Override
    public @Nullable T poll() {
      return mmHeap.pollLast();
    }
  }

  public enum HeapType {
    MIN_MAX {
      @Override
      public Queue<Integer> create(Comparator<Integer> comparator) {
        return MinMaxPriorityQueue.orderedBy(comparator).create();
      }
    },