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Session.java

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 //                 Centre for Speech Technology Research                  \\
 //                      University of Edinburgh, UK                       \\
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 //                                                                        \\
 //                  Author: Richard Caley (rjc@cstr.ed.ac.uk)             \\
 //  --------------------------------------------------------------------  \\
 //  Objects representing sessions on festival servers.                    \\
 //                                                                        \\
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package cstr.festival.client ;

import java.lang.*;
import java.util.*;
import java.awt.*;
import java.io.*;
import java.net.*;

import cstr.est.*;

class RequestRecorder implements RequestListener
{
  Object result;

  public RequestRecorder()
    {
    }

  public void requestRunning(Request r)
    {
    }

  public void requestResult(Request r, Object res)
    {
      result=res;
    }

  public void requestError(Request r, String mes)
    {
    }

  public void requestFinished(Request r)
    {
    }
}

public class Session {
  protected Festival festival;
  private int lastID=0;
  protected Hashtable requests;

  public Session(Socket sock)
    {
      festival = new Festival(sock);
      requests = new Hashtable(10);
    }

  public Session(InetAddress addr, int p)
            throws IOException
    {
      festival = new Festival(addr, p);
      requests = new Hashtable(10);
    }

  public Session(String host, int p)
            throws IOException, UnknownHostException
    {
      festival = new Festival(InetAddress.getByName(host), p);
      requests = new Hashtable(10);
    }

  protected void finalize()
    {
      terminate(false);
    }

  public void initialise()
    {
      festival.connect();
    }

  public void terminate(boolean carefully)
    {
      festival.disconnect(carefully);
    }

  public Request request(String c, RequestListener l)
    {
      Integer id = new Integer(newID());
      Request r =  new Request(c,id, this);
      if (l!= null)
      r.addRequestListener(l);
      requests.put(id, r);

      festival.newJob(id, c, this);

      return r;
    }

  public Object synchronousRequest(String c)
    {
      RequestRecorder l = new RequestRecorder();

      Request r = request(c, l);

      while (!r.isFinished())
      r.waitForUpdate();

      return l.result;
    }

  public void notifyRunning(Integer id)
    {
       Request r =  (Request)requests.get(id);

       r.notifyRunning();
    }

  public void notifyError(Integer id, String message)
    {
       Request r =  (Request)requests.get(id);

       r.notifyError(message);
    }

  public void notifyResult(Integer id, int type, byte [] result )
    {
       Request r =  (Request)requests.get(id);
       Object oRes = result;

       if (type == Festival.FT_WAVE)
       try {
         Wave wv = new Wave(result);
         oRes = wv;
       } catch (UnsupportedEncodingException ex) {
         oRes = ex;
       }
       else if (type == Festival.FT_SCHEME)
       {
         oRes = new String(result);
       }
       
       r.notifyResult(oRes);
    }

  public void notifyFinished(Integer id)
    {
       Request r =  (Request)requests.get(id);
       // it's finished, so we can forget about it.
       requests.remove(id);
       r.notifyFinished();
    }

  private int newID()
    {
      return ++lastID;
    }
}

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