reserve.java

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

/*
 * Reserve.java
 * The package functions contains the different class executing the different functions of the FlightSystem Reservation.
 */
package reservation.system.functions;

import java.util.HashSet;
import java.util.Set;

/**
 * This class hold Reserve structure. This object allows to reserve to one flight one or many persons by calling the method <CODE>reserve</CODE> in {@link reservation.system.FlightSystem}.
 * @author Texier Mathieu and Frederic Bidon
 */
public class Reserve extends Functions {
    
    /**
     * Reserve several one or many person in one flight if the command <CODE>reservation</CODE> and their arguments are correct.
     * @throws Exception if a person name is duplicated or if the person are not registered.
     * @return a confimation's message if the person(s) are registered.
     */
    public String execute() throws Exception {
        Set setPersonNames = new HashSet();
        for (int i = 1; i< arg.length; i++)
            setPersonNames.add(arg[i]);
        
        if(setPersonNames.size() != arg.length -1)
            throw new Exception("no duplicate name are allowed in reserve comande");
        
        int BookingNumber = fs.reserve(arg[0], setPersonNames);
        if (BookingNumber != -1){
            return "Your booking number is " + BookingNumber +".\r\n" +
            "\tPlease, don't forget this booking number.\r\n" +
            " It could be usefull to cancel your reservation.\r\n";
        } else {throw new Exception("The person are not succesfully reserved");}
    }
    
    /**
     * Verify that at least one flight is created.
     * Verify invariants :
     * <PRE>
     * - Arguments not null
     * </PRE>
     * @throws Exception if the invariants is violated
     */
    
    void _check(String[] arg) throws Exception {
        try {
            CheckFlightListNotEmpty();
            ArgumentIsValid(arg, 2, (short) NUMBER_ARGUMENT_MAX);
        } catch (Exception e) {
            throw new Exception(e.getMessage()+ "\r\n" + usage());
        }
    }
    
    /**
     * Display the usage for the command <CODE>reserve</code>.
     * @return the usage.
     */
    static public String usage() {
        String usage = " Usage command reserve: reserve <flightName> <personName1> [personName2] [...]\n\r";
        usage += " - The <flightName> can contain all the characters except the syntax character.\r\n";
        usage += " - The arguments <personNameX> which follow correspond to the name of the \n\r";
        usage += " different persons that you want to register on the flight.\r\n";
        usage += "\t The first letter of each passenger must be in  uppercase and all \n\r";
        usage += "\t the other in lowercase.\n\r";
        usage += "\t The number of name cannot be superior to the free place of the plane.\n";
        return usage;
    }
}