EAIinThread.java

package vrml.external.FreeWRLEAI;

import vrml.external.*;

//JAS import java.util.*;
import java.applet.*;
//JAS import java.awt.*;
import java.net.*;
import java.io.*;


// The Thread that reads input from the FreeWRL browser...
public  class EAIinThread implements Runnable {

        // DataInputStream      EAIin;
        BufferedReader  EAIin;
        Socket          sock;
        Applet          FreeWLRSceneInterface;
        Browser         mybrowser;

        boolean debug = false;

        // The following are used to send from the event thread to the
        // browser thread. The event thread gets stuff from the EAI port
        // from the FreeWRL Browser, and sends Replies back to the
        // browser thread.

        private PrintWriter EAItoBrowserPrintWriter = null;

        // Initialization - get the socket and the FreeWLRSceneInterfaces thread
        public EAIinThread (Socket s, Applet d, PrintWriter pwtoBrowserjava, Browser me) {

                sock = s;
                FreeWLRSceneInterface=d;
                mybrowser=me;
                EAItoBrowserPrintWriter = pwtoBrowserjava;
        }

        public void run() {
        // Open the socket, and wait for the first reply....

        String  reply;
        String  EVentno;
        String  EVentreply;
        String  REreply;
        String  Stemp;
        String EVTime;

        try {
                EAIin = new BufferedReader( new InputStreamReader(sock.getInputStream()));
        } catch (IOException e) {
                System.out.print ("error reiniting data input stream");
        }

        // Now, this is the loop that loops to end all loops....

        try {
                // wait for FreeWRL to send us the correct number of lines...
                // rep 1, 2, 3 should be "RE" "2" "0" , with maybe another
                // parameter at the end.
                // EVs are events, and have two following lines.

                reply = new String ("");

                while (reply != null)  {
                        // Loop here, processing incoming events
                        reply = EAIin.readLine();

                        if (reply.equals("EV")) {
                                EVTime = EAIin.readLine();
                                BrowserGlobals.TickTime = Double.parseDouble(EVTime);
                                
                                EVentno = EAIin.readLine();
                                int eventno = Integer.parseInt(EVentno);
                                if (debug) System.out.println ("EAIinThread 3 reply is " + EVentno);

                                EVentreply = new String ("");
                                reply = EAIin.readLine();
                                if (debug) System.out.println ("EAIinThread 5 reply is " + reply);

                                // Now, read the reply, until the string "EV_EOT is read in ???
                                while (!reply.equals("EV_EOT")) {
                                        EVentreply = EVentreply + reply;
                                        reply = EAIin.readLine();
                                }

                                if (debug)
                                        System.out.println ("EAIinThread sending EVentno: " +
                                                EVentno + "  EventReply " + EVentreply + " reply " + reply);

                                mybrowser.Browser_RL_Async_send(EVentreply,eventno);
                        } else if (reply.equals("RE")) {
                                EVTime = EAIin.readLine();
                                BrowserGlobals.TickTime = Double.parseDouble(EVTime);

                                // This is the integer reply to the command... number...
                                EAItoBrowserPrintWriter.println(EAIin.readLine());

                                // and the response
                                EVentreply = new String ("");
                                //EAItoBrowserPrintWriter.println(EAIin.readLine());
                                reply = EAIin.readLine();
                                if (debug) System.out.println ("EAIinThread 5xx reply is " + reply);

                                // Now, read the reply, until the string "RE_EOT is read in ???
                                while (!reply.equals("RE_EOT")) {
                                        EVentreply = EVentreply + reply;
                                        reply = EAIin.readLine();
                                }

                                EAItoBrowserPrintWriter.println(EVentreply);

                                EAItoBrowserPrintWriter.flush();

                        } else if (reply.equals ("QUIT")) {
                                if (debug) System.out.println ("EAIinThread, got the quit signal");
                                System.exit(0);
                        } else {
                                System.out.println ("expecting REor EV, got " + reply);
                                if (debug) System.out.println ("EAIinThread 9 reply is " + reply);
                        }
                }
                if (debug) System.out.println ("EAIinThread closing stream");
                        mybrowser.close();
        } catch (IOException e) {
                //System.out.print ("error reiniting data input stream\n");
        }
}
}