DataCreator.java

import java.io.Serializable;
import java.io.ObjectOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Calendar;
import java.util.Date;
import java.util.ArrayList;
public class DataCreator{
    private static final String DEFAULT_FILE = "data.ser";
    private static Calendar dateCreator = Calendar.getInstance();
    
    public static void main(String [] args){
        String fileName;
        if (args.length == 1){
            fileName = args[0];
        }
        else{
            fileName = DEFAULT_FILE;
        }
        serialize(fileName);
    }
    
    public static void serialize(String fileName){
        try{
            serializeToFile(createData(), fileName);
        }
        catch (IOException exc){
            exc.printStackTrace();
        }
    }
    
    private static Serializable createData(){
        ArrayList appointments = new ArrayList();
        ArrayList contacts = new ArrayList();
        contacts.add(new ContactImpl("Test", "Subject", "Volunteer", "United Patterns Consortium"));
        Location location1 = new LocationImpl("Punxsutawney, PA");
        appointments.add(new Appointment("Slowpokes anonymous", contacts, location1, createDate(2001, 1, 1, 12, 01), createDate(2001, 1, 1, 12, 02)));
        appointments.add(new Appointment("Java focus group", contacts, location1, createDate(2001, 1, 1, 12, 30), createDate(2001, 1, 1, 14, 30)));
        appointments.add(new Appointment("Something else", contacts, location1, createDate(2001, 1, 1, 12, 01), createDate(2001, 1, 1, 12, 02)));
        appointments.add(new Appointment("Yet another thingie", contacts, location1, createDate(2001, 1, 1, 12, 01), createDate(2001, 1, 1, 12, 02)));
        return appointments;
    }
    
    private static void serializeToFile(Serializable content, String fileName) throws IOException{
        ObjectOutputStream serOut = new ObjectOutputStream(new FileOutputStream(fileName));
        serOut.writeObject(content);
        serOut.close();
    }
    
    public static Date createDate(int year, int month, int day, int hour, int minute){
        dateCreator.set(year, month, day, hour, minute);
        return dateCreator.getTime();
    }
}