public void addHostAndIncludeSystemHost(String hostIdentifier){
  query.append(" +(conhost:SYSTEM_HOST conhost:" + hostIdentifier + ")");
}

public void addHostAndIncludeSystemHost ( String hostIdentifier ) { query . append ( " +(conhost:SYSTEM_HOST conhost:" + hostIdentifier + ")" ) ; }
adds a host limit to the query ( given host and system host
