private void initialize(ContentInfo contentInfo) {
    this.contentInfo = contentInfo;

    if (CMSObjectIdentifiers.timestampedData.equals(contentInfo.getContentType())) {
      this.timeStampedData = TimeStampedData.getInstance(contentInfo.getContent());
    } else {
      throw new IllegalArgumentException(
          "Malformed content - type must be " + CMSObjectIdentifiers.timestampedData.getId());
    }

    util = new TimeStampDataUtil(this.timeStampedData);
  }