POJO to BigQuery TableRow converter

DataToRow.java

class DataToRow {
  public static TableRow asRow(final Object child, final String pkg) {
    if (null == child) {
      return null;
    }

    TableRow row = new TableRow();
    Field[] publicFields = child.getClass().getFields();
    for (Field f : publicFields) {
      String name = f.getName();
      try {
        Object v = f.get(child);
        String type = f.getType().getCanonicalName();
        if (type.startsWith("java.lang.") || type.startsWith("java.util.")) {
          row.set(name, v);
        } else if (type.startsWith(pkg)) {
          // recurse, what could possibly go wrong.
          row.set(name, asRow(v, pkg));
        } else {
          // TODO: decide what to do when an unknown type.
        }
      } catch (IllegalAccessException e) {
        e.printStackTrace();
      }
    }
    return row;
  }
}