store_alternatif.java

This project developed in java leads us to realize a flight reservation system in order to emulate d

package reservation.system.functions;

import reservation.system.Flight;
import reservation.system.Pos;
import reservation.system.Person;

import java.io.PrintWriter;
import java.io.FileWriter;
import java.io.BufferedWriter;
import java.io.File;
import java.util.Vector;

/**
 * This class hold Store structure. This object allows to save in a file the different command generating the content of the database.
 * @author Texier Mathieu and Frederic Bidon
 */
public class Store_alternatif extends Functions{
    
    /**Name of the file where we want to save the data.*/
    private File datafile;
    
    /**
     * Verify invariants :
     * <PRE>
     * - Argument not null
     * - The number of argument equals 1
     * - File's name doesn't exist
     * - The file can be created
     * </PRE>
     * @throws Exception if the file exists or cannot be created.
     */    
    void _check (String[] arg) throws Exception {
        CheckFlightListNotEmpty ();
        ArgumentIsValid (arg, 1, 1);
        File datafile = new File (arg[0]);
        if (!datafile.exists ()) {
            if (!datafile.createNewFile ())
                throw new Exception ("Cannot create the file: " + datafile.getPath ());
        } else
            throw new Exception ("file " + datafile.getPath () + " already exist");
        
        this.datafile = datafile;
    }
    
    /**
     * Display the usage for the command <CODE>Save</code>.
     * @return the usage.
     */
    static public String usage() {
        String usage = " Usage command Save: save <fileName>\n\r";
        usage += " - The <fileName> is the path to the file to be save \n\r";
        usage +=" The file extention is .rcm .\n";
        return usage;
    }
    
    /**
     * Store in a file the different command generating the content of the database.
     * @throws Exception if the file is not saved.
     * @return a confimation's message if the file is saved.
     */
    public String execute () throws Exception {
        String[] listFlight = fs.getFlightList ();
        Integer[] listBooking = fs.getBookingList ();
        Vector listPerson;
        PrintWriter data =
        new PrintWriter (new BufferedWriter (new FileWriter (datafile)));
        for(int i = 0; i < listFlight.length; i++) {
            Flight flight = fs.selectFlight (listFlight[i]);
            String flightName = flight.getFlightName ();
            Pos dim = flight.getDimension ();
            short row = dim.getRow ();
            short col = dim.getCol ();
            String create = "create " + flightName + " " + row + " " + col;
            data.println (create);
        }
        
        for (int j = 0; j < fs.getBookingNumberMax (); j++) {
            listPerson = fs.identify (listBooking[j].intValue ());
            String Passengers = " ";
            Flight flightPerson = null;
            Person personName = null;
            for (int k = 0; k < listPerson.size (); k++) {
                personName = (Person)listPerson.get (k);
                Passengers += personName.getPersonName () + " ";
                flightPerson = personName.getFlight ();
            }
            String reserve = "reserve " + flightPerson.getFlightName () + Passengers;
            data.println (reserve);
        }
        
        data.close ();
        return "File saved";
    }
}