Retrofit.java 文件源码

/**
 * Returns a {@link Converter} for {@link ResponseBody} to {@code type} from the available
 * {@linkplain #converterFactories() factories} except {@code skipPast}.
 *
 * @throws IllegalArgumentException if no converter available for {@code type}.
 */
public <T> Converter<ResponseBody, T> nextResponseBodyConverter(Converter.Factory skipPast,
    Type type, Annotation[] annotations) {
  checkNotNull(type, "type == null");
  checkNotNull(annotations, "annotations == null");

  int start = converterFactories.indexOf(skipPast) + 1;
  for (int i = start, count = converterFactories.size(); i < count; i++) {
    Converter<ResponseBody, ?> converter =
        converterFactories.get(i).responseBodyConverter(type, annotations, this);
    if (converter != null) {
      //noinspection unchecked
      return (Converter<ResponseBody, T>) converter;
    }
  }

  StringBuilder builder = new StringBuilder("Could not locate ResponseBody converter for ")
      .append(type)
      .append(".\n");
  if (skipPast != null) {
    builder.append("  Skipped:");
    for (int i = 0; i < start; i++) {
      builder.append("\n   * ").append(converterFactories.get(i).getClass().getName());
    }
    builder.append('\n');
  }
  builder.append("  Tried:");
  for (int i = start, count = converterFactories.size(); i < count; i++) {
    builder.append("\n   * ").append(converterFactories.get(i).getClass().getName());
  }
  throw new IllegalArgumentException(builder.toString());
}