public static QualityValue valueOf(String qvalue)
   {
      if (qvalue == null)
         return DEFAULT;
      return new QualityValue(parseAsInteger(qvalue));
   }
public static QualityValue valueOf ( String qvalue ) { if ( qvalue == null ) return DEFAULT ; return new QualityValue ( parseAsInteger ( qvalue ) ) ; }
@param qvalue the quality value or {@code null} if undefined.