code: public String getFileName(String originalFileName) {
  
          if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(m_targetFileName)) {
              return m_targetFileName;
          } else if (CmsStringUtil.isNotEmptyOrWhitespaceOnly(m_targetFileNamePrefix)) {
              return m_targetFileNamePrefix + originalFileName;
          } else {
              return originalFileName;
          }
      }
docs: Returns the new file name.<p>
  
  @param originalFileName the original file name
  
  @return the new file name