Method toUTF8

solr/solrj/src/java/org/apache/solr/common/util/Utils.java:273–277

(CharArr out)

    byte[] arr = new byte[out.size() * 3];
    int nBytes = ByteUtils.UTF16toUTF8(out, 0, out.size(), arr, 0);
    return Arrays.copyOf(arr, nBytes);
  }

  public static Object fromJSON(byte[] utf8) {
    // Need below check in both fromJSON methods since
    // utf8.length returns a NPE without this check.
    if (utf8 == null || utf8.length == 0) {
      return Map.of();