telephone.java

SMC takes a state machine stored in a .sm file and generates a State pattern in twelve programming l

        return;
    }

    public void clearDisplay()
    {
        // Clear the internal data store.
        _display = "";
        _areaCode = "";
        _local = "";
        _exchange = "";

        // Put up the current time and date on the display.
        _numberDisplay.setText("");

        return;
    }

    public void startClockTimer()
    {
        long currentTime = System.currentTimeMillis();
        long timeRemaining =
            MILLIS_PER_MINUTE - (currentTime % MILLIS_PER_MINUTE);

        // Figure out how long until the top of the minute
        // and set the timer for that amount.
        startTimer("ClockTimer", timeRemaining);

        return;
    }

    public void updateClock()
    {
        _numberDisplay.setText(_ClockFormatter.format(new Date()));
        return;
    }

    public void setReceiver(String command, String text)
    {
        if (_receiverButton != null)
        {
            _receiverButton.setActionCommand(command);
            _receiverButton.setText(text);
        }

        return;
    }

    private void _loadSounds()
    {
        String directory = "jar:file:./telephone.jar!/sounds/";
        String urlString = "";
        URL soundURL;
        AudioClip audioClip;
        AudioData audioData;
        int i;

        // Load in the touch tone clips.
        _dtmf = new AudioClip[12];
        for (i = 0; i < 12; ++i)
        {
            try
            {
                urlString = directory +
                            "touch_tone_" +
                            Integer.toString(i) +
                            ".au";
                soundURL = new URL(urlString);
                _dtmf[i] = Applet.newAudioClip(soundURL);
            }
            catch (MalformedURLException urlex)
            {
                System.err.println("Telephone: \"" +
                                   urlString +
                                   "\" is a bad URL.");
            }
        }

        // Load in sound URLs.
        try
        {
            _audioMap = new HashMap<String, AudioData>();

            urlString = directory + "ring.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 4000);
            _audioMap.put("ringing", audioData);

            urlString = directory + "dialtone.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("dialtone", audioData);

            urlString = directory + "busy_signal.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("busy", audioData);

            urlString = directory + "fast_busy_signal.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("fast_busy", audioData);

            urlString = directory + "phone_off_hook.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 500);
            _audioMap.put("phone_off_hook", audioData);

            urlString = directory + "911.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 13000);
            _audioMap.put("911", audioData);

            urlString = directory + "and.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 750);
            _audioMap.put("and", audioData);

            urlString = directory + "50_cents_please.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 6000);
            _audioMap.put("50_cents_please", audioData);

            urlString = directory + "could_not_be_completed.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 4000);
            _audioMap.put("could_not_be_completed", audioData);

            urlString = directory + "exactly.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("exactly", audioData);

            urlString = directory + "oclock.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("oclock", audioData);

            urlString = directory + "oh.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("oh", audioData);

            urlString = directory + "second.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1200);
            _audioMap.put("second", audioData);

            urlString = directory + "seconds.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1400);
            _audioMap.put("seconds", audioData);

            urlString =
                directory + "the_number_you_have_dialed.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1800);
            _audioMap.put("you_dialed", audioData);

            urlString = directory + "the_time_is.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1100);
            _audioMap.put("the_time_is", audioData);

            urlString = directory + "nyctemp.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 18500);
            _audioMap.put("NYC_temp", audioData);

            urlString = directory + "AM.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("AM", audioData);

            urlString = directory + "PM.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("PM", audioData);

            urlString = directory + "0.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("0", audioData);

            urlString = directory + "1.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 900);
            _audioMap.put("1", audioData);

            urlString = directory + "2.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 900);
            _audioMap.put("2", audioData);

            urlString = directory + "3.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("3", audioData);

            urlString = directory + "4.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 900);
            _audioMap.put("4", audioData);

            urlString = directory + "5.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 900);
            _audioMap.put("5", audioData);

            urlString = directory + "6.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 850);
            _audioMap.put("6", audioData);

            urlString = directory + "7.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("7", audioData);

            urlString = directory + "8.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("8", audioData);

            urlString = directory + "9.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 900);
            _audioMap.put("9", audioData);

            urlString = directory + "10.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 750);
            _audioMap.put("10", audioData);

            urlString = directory + "11.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("11", audioData);

            urlString = directory + "12.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("12", audioData);

            urlString = directory + "13.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("13", audioData);

            urlString = directory + "14.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("14", audioData);

            urlString = directory + "15.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("15", audioData);

            urlString = directory + "16.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("16", audioData);

            urlString = directory + "17.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1500);
            _audioMap.put("17", audioData);

            urlString = directory + "18.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("18", audioData);

            urlString = directory + "19.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("19", audioData);

            urlString = directory + "20.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1250);
            _audioMap.put("20", audioData);

            urlString = directory + "30.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("30", audioData);

            urlString = directory + "40.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("40", audioData);

            urlString = directory + "50.au";
            soundURL = new URL(urlString);
            audioData = new AudioData(soundURL, 1000);
            _audioMap.put("50", audioData);
        }
        catch (MalformedURLException malex)
        {
            System.err.println("Unknown URL: " +
                               urlString);
        }

        return;
    }

    // Create the user interface but don't display it yet.
    private void _loadUI(Container pane)
    {
        String buttonText;
        String buttonCommand;
        int i;

        // Create the read-only phone number display.
        _numberDisplay = new JTextField(20);
        _numberDisplay.setEditable(false);
        _numberDisplay.setFont(new Font(null, Font.PLAIN, 10));

        // Create the off-hook/on-hook button.
        _receiverButton = new JButton("Pick up receiver ");
        _receiverButton.setActionCommand("off hook");
        _receiverButton.addActionListener(
            new ActionListener() 
                {
                    public void actionPerformed(ActionEvent e)
                    {
                        JButton button = (JButton) e.getSource();
                        String command = e.getActionCommand();

                        if (command.compareTo("off hook") == 0)
                        {
                            _fsm.OffHook();
                        }
                        else if (command.compareTo("on hook") == 0)
                        {
                            _fsm.OnHook();
                        }
                        else
                        {
                            System.out.println("Unknown receiver command: \"" +
                                               command +
                                               "\".");
                        }

                        return;
                    }
                }
            );
        _receiverButton.setEnabled(true);

        // Create the dialing buttons.
        for (i = 0; i < 12; ++i)
        {
            buttonCommand = Integer.toString(i);

            if (i < 10)
            {
                buttonText = buttonCommand;
            }
            else if (i == 10)
            {
                buttonText = "*";
            }
            else
            {
                buttonText = "#";
            }

            _dialButtons[i] = new JButton(buttonText);
            _dialButtons[i].setActionCommand(buttonCommand);
            _dialButtons[i].addActionListener(
                new ActionListener() {
                    public void actionPerformed(ActionEvent e) 
                    {
                        _fsm.Digit(e.getActionCommand());
                    }
                }
            );
            _dialButtons[i].setEnabled(true);
        }

        // Layout the components.
        GridBagLayout gridbag = new GridBagLayout();
        GridBagConstraints gridConstraints =
            new GridBagConstraints();
        pane.setLayout(gridbag);

        // Put the number display at the top.
        gridConstraints.insets = new Insets(2, 2, 2, 2);

        gridConstraints.anchor = GridBagConstraints.NORTH;
        gridConstraints.gridx = 0;
        gridConstraints.gridy = 0;
        gridConstraints.gridwidth = 3;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 5;
        gridConstraints.ipady = 5;
        gridConstraints.weighty = 1.0;
        gridbag.setConstraints(_numberDisplay, gridConstraints);
        pane.add(_numberDisplay);

        // The pick up/put down receiver button spans all columns
        // and two rows. It also sucks up all new verticle space.
        gridConstraints.anchor = GridBagConstraints.NORTH;
        gridConstraints.gridx = 0;
        gridConstraints.gridy = 1;
        gridConstraints.gridwidth = 3;
        gridConstraints.gridheight = 2;
        gridConstraints.ipadx = 5;
        gridConstraints.ipady = 5;
        gridConstraints.weighty = 1.0;
        gridbag.setConstraints(_receiverButton, gridConstraints);
        pane.add(_receiverButton);

        // Now put the dial buttons in place.
        gridConstraints.insets = new Insets(4, 4, 4, 4);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 0;
        gridConstraints.gridy = 3;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[1], gridConstraints);
        pane.add(_dialButtons[1]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 1;
        gridConstraints.gridy = 3;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[2], gridConstraints);
        pane.add(_dialButtons[2]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 2;
        gridConstraints.gridy = 3;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[3], gridConstraints);
        pane.add(_dialButtons[3]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 0;
        gridConstraints.gridy = 4;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[4], gridConstraints);
        pane.add(_dialButtons[4]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 1;
        gridConstraints.gridy = 4;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[5], gridConstraints);
        pane.add(_dialButtons[5]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 2;
        gridConstraints.gridy = 4;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[6], gridConstraints);
        pane.add(_dialButtons[6]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 0;
        gridConstraints.gridy = 5;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[7], gridConstraints);
        pane.add(_dialButtons[7]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 1;
        gridConstraints.gridy = 5;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[8], gridConstraints);
        pane.add(_dialButtons[8]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 2;
        gridConstraints.gridy = 5;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;
        gridConstraints.ipady = 2;
        gridConstraints.weightx = 0.0;
        gridConstraints.weighty = 0.0;
        gridbag.setConstraints(_dialButtons[9], gridConstraints);
        pane.add(_dialButtons[9]);

        gridConstraints.anchor = GridBagConstraints.CENTER;
        gridConstraints.gridx = 0;
        gridConstraints.gridy = 6;
        gridConstraints.gridwidth = 1;
        gridConstraints.gridheight = 1;
        gridConstraints.ipadx = 2;