public String buildRevision(final char[] previousRevision){
  String prevRev=null;
  if (previousRevision != null) {
    prevRev=String.valueOf(previousRevision);
  }
  return buildRevision(prevRev);
}

public String buildRevision ( final char [ ] previousRevision ) { String prevRev = null ; if ( previousRevision != null ) { prevRev = String . valueOf ( previousRevision ) ; } return buildRevision ( prevRev ) ; }
builds the current revision .
