private void putFieldDescription(CompactFieldNode field, JSONObject port, TypeGraphVertex tgv)
      throws JSONException {
    OperatorClassInfo oci = classInfo.get(tgv.typeName);
    if (oci != null) {
      String fieldDesc = oci.fields.get(field.getName());
      if (fieldDesc != null) {
        port.put("description", fieldDesc);
        return;
      }
    }

    for (TypeGraphVertex ancestor : tgv.getAncestors()) {
      putFieldDescription(field, port, ancestor);
    }
  }
  private JSONObject setFieldAttributes(String clazz, CompactFieldNode field) throws JSONException {
    JSONObject port = new JSONObject();
    port.put("name", field.getName());

    TypeGraphVertex tgv = typeGraph.getTypeGraphVertex(clazz);
    putFieldDescription(field, port, tgv);

    List<CompactAnnotationNode> annotations = field.getVisibleAnnotations();
    CompactAnnotationNode firstAnnotation;
    if (annotations != null
        && !annotations.isEmpty()
        && (firstAnnotation = field.getVisibleAnnotations().get(0)) != null) {
      for (Map.Entry<String, Object> entry : firstAnnotation.getAnnotations().entrySet()) {
        port.put(entry.getKey(), entry.getValue());
      }
    }

    return port;
  }