maddcommand.java

基于Java的软件信息系统－项目管理

package cmd;

import core.*;
import db.*;
import java.text.ParseException;
import java.util.Date;
import java.util.List;

public class MAddCommand extends MDatabaseCommand
{
    private static final String [] PARAM_NAMES =
    { "first", "last", "date", "days", "type", "guests" };
    private static final String [] PARAM_PROMPTS =
    { "Enter first name:", "Enter last name:", 
      "Enter date of arrival (mm/dd/yy):",
      "Enter days staying:", "Enter room type:", "Enter # of guests:" };

    public MAddCommand ()
	throws java.io.IOException
    {
	super ();
    }

    public String [] getParameterNames ()
    {
	return PARAM_NAMES;
    }
    
    public String [] getParameterPrompts ()
    {
	return PARAM_PROMPTS;
    }

    public void executeDatabaseCommand (HotelDB database)
    { 
	try {
	    addReservation (database);
            displayResults ("Reservation added", null);
	} catch (ParseException e) {
	    System.err.println ("AddCommand: Error parsing date " + 
				getParameter ("date"));
	    System.err.println ("Command not executed.");
	} catch (NumberFormatException e) {
	    System.err.println ("AddCommand: Error parsing integer value ");
	    System.err.println ("Command not executed.");
	}
    }

    protected void displayResultsText (String title, List result)
    {
        System.out.println (title);
    }

    protected void displayResultsGUI (String title, List result)
    {
        javax.swing.JOptionPane.showMessageDialog(getFrame(), title, 
                                      "Add Command Succeeded", 
                                      javax.swing.JOptionPane.INFORMATION_MESSAGE);
    }

    private void addReservation (HotelDB database)
	throws java.text.ParseException, NumberFormatException
    {
	String dateString = getParameter ("date");
	Date date = DBUtilities.parseDate (dateString);
	int roomType = Integer.parseInt (getParameter ("type"));
	int guests = Integer.parseInt (getParameter ("guests"));
	int days = Integer.parseInt (getParameter ("days"));
	Reservation res = new Reservation (getParameter ("last"),
					   getParameter ("first"),
					   date, guests, roomType, days);
	database.addReservation (res);
    }

    public String getName ()
    { return "add"; }
    public String getMenuName ()
    { return "Add..."; }
    public String getDescription ()
    { 
	return "Adds a reservation (date (MM/DD/YY), first, last, room type, guests, days"; 
    }
    public Command makeInstance ()
    {
	try
	{
	    return new MAddCommand ();
	} catch (java.io.IOException e)
	{
	    return null;
	}
    }
}