Christoph at 17:32, 17 December 2005

2005-12-17T17:32:34Z

Christoph: Added "FlightSystemUser.java" as a test

2005-12-17T17:32:04Z

Added "FlightSystemUser.java" as a test

New page

<java>
package flightSystem;

import java.io.*;
import java.util.*;

import commandObjects.CancelObject;
import commandObjects.CreateObject;
import commandObjects.ExitObject;
import commandObjects.FlightsObject;
import commandObjects.IdentifyObject;
import commandObjects.ListObject;
import commandObjects.ReloadObject;
import commandObjects.ReserveObject;
import commandObjects.StoreObject;
import exceptions.*;

/**
* This is the MAIN() class!
*
* It provides access to all the data structures generated/created
* and provides the user with a way to interact with the application.
*
* NOTE: The interaction is entirely from the command prompt!

* @author Christoph Champ (s051307)
*/

public class FlightSystemUser {

// Constructors
// No arg Constructor
public FlightSystemUser() {}

// Other Methods
/**
* Method that tokenizes the command argument line introduced by the
* user and executes the corresponding method.
* @param line
* The line introduced by the user
* @param in
* The buffered reader from where the line was read
* @throws ExpIllegalCommand
* The syntax of the command introduced by the user is not correct
* @throws ExpFlightNotExist
* The flight name inserted by the user does not exist
* @throws ExpIllegalValues
* The values inserted by the user are not correct.
* @throws ExpSeatsFull
* There are no so many seats available
* @throws ExpReserveNotExist
* The booking number inserted by the user does not identify
* any reservation
*/
public void exec(String line, BufferedReader in)
throws ExpIllegalCommand, ExpIllegalValues, ExpFlightNotExist,
ExpReserveNotExist, ExpSeatsFull, ExpFlightExists
{
// Tokenize the line read
StringTokenizer st = new StringTokenizer(line);
if ( st.hasMoreTokens() ) {
// Get the first token, which identifies the command
// to be executed
String command = new String(st.nextToken().toLowerCase());
// Execute the right command depending on the data.
if (command.equals("create"))
new CreateObject().parse(st);
else if (command.equals("reserve"))
new ReserveObject().parse(st);
else if (command.equals("cancel"))
new CancelObject().parse(st);
else if (command.equals("identify"))
new IdentifyObject().execute(st);
else if (command.equals("list"))
new ListObject().parse(st);
else if( command.equals("flights") )
new FlightsObject().parse();
else if( command.equals("store") )
new StoreObject().parse(st);
else if( command.equals("reload") )
new ReloadObject().parse(st);
else if (command.equals("exit"))
new ExitObject().parse(st, in);
else
System.out.println("\tUnrecognized command " + line);
}
else System.out.println("\tUnrecognized command " + line);
}

// STDOUT MESSAGES
/**
* Displays the commands that the user can execute
*/
private void available() {
System.out.println("\tPossible Commands:\n");
System.out.println("\t-> create flightName rows rowLength");
System.out.println("\t-> reserve flightName passenger1 [passenger2 .. passengerN]");
System.out.println("\t-> cancel bookingNumber");
System.out.println("\t-> cancel bookingNumber passenger1 [passenger2 .. passengerN]");
System.out.println("\t-> identify bookingNumber");
System.out.println("\t-> list flightName");
System.out.println("\t-> flights");
System.out.println("\t-> store filename");
System.out.println("\t-> reload filename");
System.out.println("\t-> exit\n");
}

/**
* Opening introduction to programme
*/
public void intro() {
System.out.println("\n\t======================================");
System.out.println("\t| |");
System.out.println("\t| A Simple Flight Reservation System |");
System.out.println("\t| |");
System.out.println("\t| Authors: Christoph Champ |");
System.out.println("\t| Created: 6 November 2005 |");
System.out.println("\t| Subject: 02115 Java Programming |");
System.out.println("\t| |");
System.out.println("\t======================================\n");

available();
}

/**
* This is the main section of the MAIN() section:
*/
public static void main(String[] args) {
// The buffered reader from where we will read the data
BufferedReader in;
try {
switch (args.length) {
// If the number of arguments is 0, the programme
// should interact with the user
case 0:
in = new BufferedReader(new InputStreamReader(System.in));
break;

// If the number of arguments is 1, the programme should
// read the data from a text file
case 1:
in = new BufferedReader(new FileReader(args[0]));
break;

// The programme have not been called properly
default:
throw new ExpInvalidArg(args);
}

// Variable to store each line read
String line;
// Variable to handle the state of the flight system
FlightSystemUser fsu = new FlightSystemUser();

// Display the introduction
fsu.intro();

// While there is data available, process it
// Main loop, reads the input, executes the commands, and
// displays the output
while ( (line = in.readLine()) != null ) {
// Try to execute the command
try {
fsu.exec(line, in);
}

// Handle illegal command exception
catch(ExpIllegalCommand e) {
System.out.println(e);
}

// Handle illegal values exception
catch(ExpIllegalValues e) {
System.out.println(e);
}

// Handle non-existent reservation exception
catch(ExpReserveNotExist e) {
System.out.println(e);
}

// Handle illegal command exception
catch(ExpFlightNotExist e) {
System.out.println(e);
}

// Handle number format exception
catch(NumberFormatException e) {
System.out.println("\tInvalid input value: " +
e.getMessage());
System.out.println("\tInteger excepted.");
}

// Handle no more seats exception
catch(ExpSeatsFull e) {
System.out.println(e);
}

// Handle that the flight has already been created
catch(ExpFlightExists e) {
System.out.println(e);
}
}
}

// Handle IOException exception
catch (IOException e) {
System.out.println("Can't locate file!");
}

// Handle invalid arguments exception
catch (ExpInvalidArg e) {
System.out.println(e);
}
}
}
</java>

@@ Line 24: / Line 24: @@
   * NOTE: The interaction is entirely from the command prompt!
-  * @author Christoph Champ (s051307)
+  * @author Christoph Champ
   */

GeSHi/Java - Revision history

Christoph at 17:32, 17 December 2005

Christoph: Added "FlightSystemUser.java" as a test