question: private static String normalizeUriEscape ( byte [ ] rawUri , int i , int len , String encoding ) throws IOException { ByteToChar converter = allocateConverter ( ) ; if ( encoding == null ) { encoding = "utf-8" ; } try { converter . setEncoding ( encoding ) ; } catch ( UnsupportedEncodingException e ) { log . log ( Level . FINE , e . toString ( ) , e ) ; } try { while ( i < len ) { int ch = rawUri [ i ++ ] & 0xff ; if ( ch == '%' ) i = scanUriEscape ( converter , rawUri , i , len ) ; else converter . addByte ( ch ) ; } String result = converter . getConvertedString ( ) ; freeConverter ( converter ) ; return result ; } catch ( Exception e ) { throw new BadRequestException ( L . l ( "The URL contains escaped bytes unsupported by the {0} encoding." , encoding ) ) ; } }
target:  Converts the escaped URI to a string.