@Override public boolean isValidRow(Map<String,Object> row){
  if (!row.containsKey(column)) {
    return false;
  }
  Matcher match=pattern.matcher((CharSequence)row.get(column));
  return match.find();
}

@ Override public boolean isValidRow ( Map < String , Object > row ) { if ( ! row . containsKey ( column ) ) { return false ; } Matcher match = pattern . matcher ( ( CharSequence ) row . get ( column ) ) ; return match . find ( ) ; }
for valid row column value string must match regular expression .
