Determining the DatabaseChangeEvent which occurred on a TABLE

Not for myself:

Registration Properties

Properties props = new Properties();
props.put(OracleConnection.DCN_NOTIFY_ROWIDS, "true");
props.put(OracleConnection.NTF_QOS_RELIABLE, "false");
props.setProperty(OracleConnection.DCN_BEST_EFFORT, "true");

DatabaseChangeRegistration dcr =
    conn.registerDatabaseChangeNotification(props);

Listener Class

package pas.jdbc;

import oracle.jdbc.dcn.DatabaseChangeEvent;
import oracle.jdbc.dcn.DatabaseChangeListener;
import oracle.jdbc.dcn.RowChangeDescription;
import oracle.jdbc.dcn.RowChangeDescription.RowOperation;
import oracle.jdbc.dcn.TableChangeDescription;


public class DCNListener implements DatabaseChangeListener
{
DCNDemo demo;
DCNListener(DCNDemo dem)
{
  demo = dem;
}

public void onDatabaseChangeNotification(DatabaseChangeEvent databaseChangeEvent)
{
System.out.println("DCNListener: got an event (" + this + ")");
System.out.println(databaseChangeEvent.toString());
TableChangeDescription [] tableChanges =
      databaseChangeEvent.getTableChangeDescription();

for (TableChangeDescription tableChange : tableChanges)
{
  RowChangeDescription[] rcds = tableChange.getRowChangeDescription();
  for (RowChangeDescription rcd : rcds)
  {
    System.out.println("Affected row -> " + rcd.getRowid().stringValue());
    RowOperation ro = rcd.getRowOperation();
    if (ro.equals(RowOperation.INSERT))
    {
      System.out.println("INSERT occurred");
    }
    else if (ro.equals(RowOperation.UPDATE))
    {
      System.out.println("UPDATE occurred");
    }
    else if (ro.equals(RowOperation.DELETE))
    {
      System.out.println("DELETE occurred");
    }
    else
    {
      System.out.println("Not a INSERT/DELETE/UPDATE change");
    }
  }
}

synchronized( demo )
{
  demo.notify();
}

}