Method getGenericSuperclass

output/java_guava/1.4.19/TypeToken.java:293–309

Returns the generic superclass of this type or null if the type represents Object or an interface. This method is similar but different from Class#getGenericSuperclass. For example, new TypeToken () {.getGenericSuperclass()} will return {@code new Type

()

   */

  @Nullable final TypeToken<? super T> getGenericSuperclass() {
    if (runtimeType instanceof TypeVariable) {
      // First bound is always the super class, if one exists.
      return boundAsSuperclass(((TypeVariable<?>) runtimeType).getBounds() [0]);
    }
    if (runtimeType instanceof WildcardType) {
      // wildcard has one and only one upper bound.
      return boundAsSuperclass(((WildcardType) runtimeType).getUpperBounds() [0]);
    }
    Type superclass = getRawType().getGenericSuperclass();
    if (superclass == null) {
      return null;
    }
    @SuppressWarnings("unchecked") // super class of T
    TypeToken<? super T> superToken = (TypeToken<? super T>) resolveSupertype(superclass);
    return superToken;
  }

  @Nullable
  private TypeToken<? super T> boundAsSuperclass(Type bound) {