public static void checkTracerName ( String tracerName , NotificationSource notificationSource ) throws NullPointerException , InvalidArgumentException { if ( tracerName . equals ( "" ) ) { // This is root return ; } StringTokenizer stringTokenizer = new StringTokenizer ( tracerName , "." , true ) ; String lastToken = null ; while ( stringTokenizer . hasMoreTokens ( ) ) { String token = stringTokenizer . nextToken ( ) ; if ( lastToken == null ) { // this is start lastToken = token ; } if ( lastToken . equals ( token ) && token . equals ( "." ) ) { throw new InvalidArgumentException ( "Passed tracer:" + tracerName + ", name for source: " + notificationSource + ", is illegal" ) ; } lastToken = token ; } if ( lastToken . equals ( "." ) ) { throw new IllegalArgumentException ( "Passed tracer:" + tracerName + ", name for source: " + notificationSource + ", is illegal" ) ; } }
This checks if the specified tracer name is ok .