/* License
*
* Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistribution of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* * Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
* DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
* REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
* INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
* OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
* EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended
* for use in the design, construction, operation or maintenance of any
* nuclear facility.
*/
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreException;
import javax.microedition.rms.RecordStoreNotOpenException;
public class QuotesMIDlet extends MIDlet implements CommandListener {
Display display = null;
List menu = null; // main menu
List choose = null;
TextBox input = null;
Ticker ticker = new Ticker("Database Application");
String quoteServer = "http://quote.yahoo.com/d/quotes.csv?s=";
String quoteFormat = "&f=slc1wop";
static final Command backCommand = new Command("Back", Command.BACK, 0);
static final Command mainMenuCommand = new Command("Main", Command.SCREEN, 1);
static final Command saveCommand = new Command("Save", Command.OK, 2);
static final Command exitCommand = new Command("Exit", Command.STOP, 3);
String currentMenu = null;
// Stock data
String name, date, price;
StockDB db = null;
public QuotesMIDlet() {
}
public void startApp() throws MIDletStateChangeException {
display = Display.getDisplay(this);
// open a db stock file
try {
db = new StockDB("stocks");
} catch (Exception e) {
}
menu = new List("Stocks Database", Choice.IMPLICIT);
menu.append("List Stocks", null);
menu.append("Add A New Stock", null);
menu.addCommand(exitCommand);
menu.setCommandListener(this);
menu.setTicker(ticker);
mainMenu();
}
public void pauseApp() {
display = null;
choose = null;
menu = null;
ticker = null;
try {
db.close();
db = null;
} catch (Exception e) {
}
}
public void destroyApp(boolean unconditional) {
try {
db.close();
} catch (Exception e) {
}
notifyDestroyed();
}
void mainMenu() {
display.setCurrent(menu);
currentMenu = "Main";
}
public String tickerString() {
StringBuffer ticks = null;
try {
RecordEnumeration enum = db.enumerate();
ticks = new StringBuffer();
while (enum.hasNextElement()) {
String stock1 = new String(enum.nextRecord());
ticks.append(Stock.getName(stock1));
ticks.append(" @ ");
ticks.append(Stock.getPrice(stock1));
ticks.append(" ");
}
} catch (Exception ex) {
}
return (ticks.toString());
}
public void addStock() {
input = new TextBox("Enter a Stock Name:", "", 5, TextField.ANY);
input.setTicker(ticker);
input.addCommand(saveCommand);
input.addCommand(backCommand);
input.setCommandListener(this);
input.setString("");
display.setCurrent(input);
currentMenu = "Add";
}
public String getQuote(String input) throws IOException,
NumberFormatException {
String url = quoteServer + input + quoteFormat;
StreamConnection c = (StreamConnection) Connector.open(url,
Connector.READ_WRITE);
InputStream is = c.openInputStream();
StringBuffer sb = new StringBuffer();
int ch;
while ((ch = is.read()) != -1) {
sb.append((char) ch);
}
return (sb.toString());
}
public void listStocks() {
choose = new List("Choose Stocks", Choice.MULTIPLE);
choose.setTicker(new Ticker(tickerString()));
choose.addCommand(backCommand);
choose.setCommandListener(this);
try {
RecordEnumeration re = db.enumerate();
while (re.hasNextElement()) {
String theStock = new String(re.nextRecord());
choose.append(Stock.getName(theStock) + " @ "
+ Stock.getPrice(theStock), null);
}
} catch (Exception ex) {
}
display.setCurrent(choose);
currentMenu = "List";
}
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if (label.equals("Exit")) {
destroyApp(true);
} else if (label.equals("Save")) {
if (currentMenu.equals("Add")) {
// add it to database
try {
String userInput = input.getString();
String pr = getQuote(userInput);
db.addNewStock(pr);
ticker.setString(tickerString());
} catch (IOException e) {
} catch (NumberFormatException se) {
}
mainMenu();
}
} else if (label.equals("Back")) {
if (currentMenu.equals("List")) {
// go back to menu
mainMenu();
} else if (currentMenu.equals("Add")) {
// go back to menu
mainMenu();
}
} else {
List down = (List) display.getCurrent();
switch (down.getSelectedIndex()) {
case 0:
listStocks();
break;
case 1:
addStock();
break;
}
}
}
}
class StockDB {
RecordStore recordStore = null;
public StockDB() {
}
public StockDB(String fileName) {
try {
recordStore = RecordStore.openRecordStore(fileName, true);
} catch (RecordStoreException rse) {
rse.printStackTrace();
}
}
public void close() throws RecordStoreNotOpenException, RecordStoreException {
if (recordStore.getNumRecords() == 0) {
String fileName = recordStore.getName();
recordStore.closeRecordStore();
recordStore.deleteRecordStore(fileName);
} else {
recordStore.closeRecordStore();
}
}
public synchronized void addNewStock(String record) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
DataOutputStream outputStream = new DataOutputStream(baos);
try {
outputStream.writeUTF(record);
} catch (IOException ioe) {
System.out.println(ioe);
ioe.printStackTrace();
}
byte[] b = baos.toByteArray();
try {
recordStore.addRecord(b, 0, b.length);
} catch (RecordStoreException rse) {
System.out.println(rse);
rse.printStackTrace();
}
}
public synchronized RecordEnumeration enumerate()
throws RecordStoreNotOpenException {
return recordStore.enumerateRecords(null, null, false);
}
}
/*
* License
*
* Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistribution of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistribution in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN") AND ITS
* LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A
* RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
* IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT
* OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR
* PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS
* BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed, licensed or intended for
* use in the design, construction, operation or maintenance of any nuclear
* facility.
*/
class Stock {
private static String name, time, price;
public static void parse(String data) {
int index = data.indexOf('"');
name = data.substring(++index, (index = data.indexOf('"', index)));
index += 3;
time = data.substring(index, (index = data.indexOf('-', index)) - 1);
index += 5;
price = data.substring(index, (index = data.indexOf('<', index)));
}
public static String getName(String record) {
parse(record);
return (name);
}
public static String getPrice(String record) {
parse(record);
return (price);
}
}
