import java.util.Enumeration;
import java.util.Hashtable;
import java.io.*;

/**
 * Debate moderator
 */
public class Moderator extends Thread
  {
    private Moderator( String name )
      {
        super (name);
      }

    /**
     * accessor for the Singleton moderator
     */
    public static Moderator getModerator ()
      {
        return _theModerator;
      }

    /**
     * add a debater
     *
     * @param name the debater's name
     * @to_say the debater's (scripted) text
     */
    public void addDebater( String name, String to_say )
      {
        Redemopublicrat debater = new Redemopublicrat (name, to_say);

        _debaters.put ("Mr. " + name, debater);
      }

    /**
     * Thread run loop
     */
    public void run()
      {
        Enumeration debaters = _debaters.elements ();
        while (debaters.hasMoreElements())
          {
            ((Redemopublicrat) debaters.nextElement ()).start();
            yield();   // let the debater initialize itself
          }

        for (int i = 0; i < 10; ++i)
          {
            debaters = _debaters.keys ();
            while (debaters.hasMoreElements ())
              {
                String name = (String) debaters.nextElement ();
                Redemopublicrat debator =
                  (Redemopublicrat) _debaters.get (name);

                System.out.println (getName() + ": " + name);
                debator.go ();
                yield();
              }
          }
     }

    static private Moderator _theModerator = new Moderator ("Lehrer");
    static private Hashtable _debaters = new Hashtable();
}