private String wrapFilename(String fileName){
  StringBuilder newFileName=new StringBuilder();
  if (configuration.getDebugPrefix() != null) {
    newFileName.append(configuration.getDebugPrefix());
  }
  newFileName.append(fileName);
  if (suffixDateFormat != null && (configuration.getRotationInterval() > 0 || configuration.getRotationFileSizeInByte() > 0)) {
synchronized (suffixDateFormat) {
      newFileName.append(suffixDateFormat.format(new Date(fileCreationTime)));
    }
  }
  return newFileName.toString();
}

private String wrapFilename ( String fileName ) { StringBuilder newFileName = new StringBuilder ( ) ; if ( configuration . getDebugPrefix ( ) != null ) { newFileName . append ( configuration . getDebugPrefix ( ) ) ; } newFileName . append ( fileName ) ; if ( suffixDateFormat != null && ( configuration . getRotationInterval ( ) > 0 || configuration . getRotationFileSizeInByte ( ) > 0 ) ) { synchronized ( suffixDateFormat ) { newFileName . append ( suffixDateFormat . format ( new Date ( fileCreationTime ) ) ) ; } } return newFileName . toString ( ) ; }
compute the final log file name ( prefix and suffix )
