* Specifies the language preference if redirection fails.
     */
    public String lang;

    /**
     * Additional fields map for error page fallback.
     * Contains extra search parameters as key-value pairs if redirection fails.
     */
    public Map<String, String[]> fields = new HashMap<>();

  // Secret sauce for setting final fields; don't make it public.
  static final class FieldSetter<T> {
    private final Field field;

    private FieldSetter(Field field) {
      this.field = field;
      field.setAccessible(true);
    }

    void set(T instance, Object value) {
      try {
        field.set(instance, value);
      } catch (IllegalAccessException impossible) {
        throw new AssertionError(impossible);

        assertNotNull(result);

    }

    // Test with various field names
    public void test_convertFuzzyQuery_withVariousFields() {
        QueryContext context = new QueryContext("test", false);
        String[] fields = { "title", "content", "url", "site", "host", "mimetype" };

        for (String field : fields) {
            Term term = new Term(field, "fuzzy");
            FuzzyQuery fuzzyQuery = new FuzzyQuery(term);

     * Returns the field.
     *
     * @return the field
     */
    Field getField();

    /**
     * Returns the field name.
     *
     * @return the field name
     */
    String getFieldName();

    /**
     * Returns the type of the field.
     *
     * @param <T>
     *            the type of the field
     * @return the type of the field
     */
    <T> Class<T> getFieldType();

    /**

              thrownAtomicReferenceFieldUpdaterFailure);
    }
  }

  // TODO(lukes): Investigate using a @Contended annotation on these fields once one is available.

  /*
   * The following fields are package-private, even though we intend never to use them outside this
   * file. If they were instead private, then we wouldn't be able to access them reflectively from

    }

    /**
     * Adds a field and text pair to the field log for tracking query terms.
     * @param field The field name.
     * @param text The query text for this field.
     */
    public void addFieldLog(final String field, final String text) {
        if (fieldLogMap == null) {
            return;
        }

        List<String> list = fieldLogMap.get(field);
        if (list == null) {

            if (ComponentUtil.hasComponent("ingestFactory")) {
                try {
                    java.lang.reflect.Field field = IndexUpdateCallbackImpl.class.getDeclaredField("ingestFactory");
                    field.setAccessible(true);
                    field.set(this, ComponentUtil.getComponent("ingestFactory"));
                } catch (Exception e) {
                    // Ignore for tests
                }

    }

    /**
     * The unique identifier of the scheduler being edited.
     * This is a required field for identifying which scheduler to update.
     */
    @Required
    @Size(max = 1000)
    public String id;

    /**
     * The version number of the scheduler for optimistic locking.
     * This field is required to prevent concurrent modification conflicts

              thrownAtomicReferenceFieldUpdaterFailure);
    }
  }

  // TODO(lukes): Investigate using a @Contended annotation on these fields once one is available.

  /*
   * The following fields are package-private, even though we intend never to use them outside this
   * file. If they were instead private, then we wouldn't be able to access them reflectively from

  public static final String DATE = "Date";

  /** The HTTP {@code Pragma} header field name. */
  public static final String PRAGMA = "Pragma";

  /** The HTTP {@code Via} header field name. */
  public static final String VIA = "Via";

  /** The HTTP {@code Warning} header field name. */
  public static final String WARNING = "Warning";

  // HTTP Request header fields