Java tutorial
/** * Copyright (C) 2011 Brian Ferris <bdferris@onebusaway.org> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.onebusaway.phone.client; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.io.IOException; import java.util.ArrayDeque; import java.util.Deque; import java.util.regex.Matcher; import java.util.regex.Pattern; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.WindowConstants; import javax.swing.event.DocumentEvent; import javax.swing.event.DocumentListener; import javax.swing.text.BadLocationException; import javax.swing.text.Document; import javax.swing.text.PlainDocument; import org.apache.commons.cli.CommandLine; import org.apache.commons.cli.GnuParser; import org.apache.commons.cli.Options; import org.apache.commons.cli.ParseException; import org.apache.commons.cli.Parser; import org.asteriskjava.fastagi.AgiClientChannel; import org.asteriskjava.fastagi.AgiClientScript; import org.asteriskjava.fastagi.AgiException; import org.asteriskjava.fastagi.DefaultAgiClient; import org.asteriskjava.fastagi.reply.AgiReply; public class SimplePhoneClient { private static final String ARG_HOSTNAME = "hostname"; private static final String ARG_PORT = "port"; private static final String ARG_CALLER_ID = "callerId"; private static final Pattern TEXT_PATTERN = Pattern.compile("^\"(.*)\" \".*\"$"); public static void main(String[] args) throws IOException, ParseException { Parser parser = new GnuParser(); Options options = buildOptions(); CommandLine cli = parser.parse(options, args); String host = cli.getOptionValue(ARG_HOSTNAME, "localhost"); int port = Integer.parseInt(cli.getOptionValue(ARG_PORT, "8001")); String callerId = cli.getOptionValue(ARG_CALLER_ID, "2000"); AgiClientScriptImpl script = new AgiClientScriptImpl(); setupGui(script); DefaultAgiClient client = new DefaultAgiClient(host, port, script); client.setCallerId(callerId); client.setNetworkScript("index.agi"); client.run(); } private static void setupGui(AgiClientScriptImpl script) { JFrame frame = new JFrame(); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); KeyPressHandler handler = new KeyPressHandler(script); JPanel panel = new JPanel(); panel.setLayout(new BorderLayout()); panel.addKeyListener(handler); JPanel buttonPanel = new JPanel(); buttonPanel.setLayout(new GridLayout(4, 3)); panel.add(buttonPanel, BorderLayout.CENTER); String buttons = "123456789*0#"; for (int i = 0; i < buttons.length(); i++) addButton(buttonPanel, script, handler, buttons.charAt(i)); Document document = script.getDocument(); final JTextArea textArea = new JTextArea(document); textArea.setEditable(false); textArea.addKeyListener(handler); document.addDocumentListener(new ScrollDocumentToEnd(textArea)); JScrollPane scrollPane = new JScrollPane(textArea); scrollPane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); scrollPane.setPreferredSize(new Dimension(300, 100)); scrollPane.addKeyListener(handler); panel.add(scrollPane, BorderLayout.SOUTH); frame.getContentPane().add(panel); frame.pack(); frame.setVisible(true); } private static Options buildOptions() { Options options = new Options(); options.addOption(ARG_HOSTNAME, true, "hostname to connect to"); options.addOption(ARG_PORT, true, "host port to connect to"); options.addOption(ARG_CALLER_ID, true, "callerId to use"); return options; } private static void addButton(JPanel panel, final AgiClientScriptImpl script, KeyPressHandler handler, final char key) { String label = Character.toString(key); JButton button = new JButton(label); button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { script.pushChar(key); } }); button.addKeyListener(handler); panel.add(button); } private static class AgiClientScriptImpl implements AgiClientScript { private static final String COMMAND_WAIT_FOR_DIGIT = "WAIT FOR DIGIT"; private static final String COMMAND_SAY_ALPHA = "SAY ALPHA"; private Deque<Character> _queue = new ArrayDeque<Character>(); private Document _document = new PlainDocument(); public Document getDocument() { return _document; } @Override public synchronized void service(AgiReply reply, AgiClientChannel channel) throws AgiException { String firstLine = reply.getFirstLine(); if (firstLine.startsWith(COMMAND_WAIT_FOR_DIGIT)) { String token = firstLine.substring(COMMAND_WAIT_FOR_DIGIT.length()); token = token.trim(); long value = Long.parseLong(token); try { wait(value); } catch (InterruptedException e) { return; } } else if (firstLine.startsWith(COMMAND_SAY_ALPHA)) { String token = firstLine.substring(COMMAND_SAY_ALPHA.length()); token = token.trim(); Matcher matcher = TEXT_PATTERN.matcher(token); if (matcher.matches()) token = matcher.group(1); if (token.length() > 0) { appendLineToOutput(token); long value = 40 * token.length(); try { wait(value); } catch (InterruptedException e) { return; } } } else { System.out.println(firstLine); } char result = 0; if (!_queue.isEmpty()) { result = _queue.poll(); appendLineToOutput(">> " + result); } channel.sendDigit(result); } private void appendLineToOutput(String token) { try { _document.insertString(_document.getLength(), token + "\n", null); } catch (BadLocationException ex) { throw new IllegalStateException(ex); } } public synchronized void pushChar(char value) { _queue.add(value); notify(); } } private static class ScrollDocumentToEnd implements DocumentListener { private JTextArea _textArea; public ScrollDocumentToEnd(JTextArea textArea) { _textArea = textArea; } @Override public void insertUpdate(DocumentEvent e) { Document document = e.getDocument(); try { String text = document.getText(0, document.getLength()); int position = document.getLength() - 1; int index = text.lastIndexOf('\n', document.getLength() - 2); if (index != -1) position = Math.min(position, index + 20); _textArea.setCaretPosition(position); } catch (BadLocationException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } } @Override public void changedUpdate(DocumentEvent e) { } @Override public void removeUpdate(DocumentEvent e) { } } private static class KeyPressHandler extends KeyAdapter { private AgiClientScriptImpl _script; public KeyPressHandler(AgiClientScriptImpl script) { _script = script; } @Override public void keyTyped(KeyEvent e) { _script.pushChar(e.getKeyChar()); } } }