Method getDelegateAdapter

gson/src/main/java/com/google/gson/Gson.java:451–480

This method is used to get an alternate type adapter for the specified type. This is used to access a type adapter that is overridden by a {@link TypeAdapterFactory} that you may have registered. This feature is typically used when you want to register a type adapter that does a little bit of work b

(TypeAdapterFactory skipPast, TypeToken<T> type)

   * @since 2.2
   */
  public <T> TypeAdapter<T> getDelegateAdapter(TypeAdapterFactory skipPast, TypeToken<T> type) {
    Objects.requireNonNull(skipPast, "skipPast must not be null");
    Objects.requireNonNull(type, "type must not be null");

    if (jsonAdapterFactory.isClassJsonAdapterFactory(type, skipPast)) {
      skipPast = jsonAdapterFactory;
    }

    boolean skipPastFound = false;
    for (TypeAdapterFactory factory : factories) {
      if (!skipPastFound) {
        if (factory == skipPast) {
          skipPastFound = true;
        }
        continue;
      }

      TypeAdapter<T> candidate = factory.create(this, type);
      if (candidate != null) {
        return candidate;
      }
    }

    if (skipPastFound) {
      throw new IllegalArgumentException("GSON cannot serialize or deserialize " + type);
    } else {
      // Probably a factory from @JsonAdapter on a field
      return getAdapter(type);
    }
  }

  /**
   * This method serializes the specified object into its equivalent representation as a tree of