Adding items to table

Hello,

I'm creating a sort of time table for classes, and I need to add data from database and a form to a table that shows all the info.

This is my POJO class, schedule

private int id;
private int dayOfWeek;
private LocalTime startTime;
private LocalTime endTime;

This is how I build the table

tbl_schedule.addContainerProperty("id", Integer.class, null);
tbl_schedule.addContainerProperty("dayOfWeek", String.class, null);
tbl_schedule.addContainerProperty("startTime", LocalTime.class, null);
tbl_schedule.addContainerProperty("endTime", LocalTime.class, null);

And this is how I add the new item to the table

Object newId = tbl_schedule.addItem(new Object[] {
    schedule.getId(),
    schedule.getDayOfWeek(),
    schedule.getStartTime(),
    schedule.getEndTime()},
null);

That function returns null, so the new item is not being added.

I know I could use a BeanItemContainer but this class has a dependency with another one (my class has one or more schedules) and I don't know how to handle that.

Also, I want to show the day as a String like sunday, monday etc. I have tried with a custom StringToIntegerConverter, with no result. The table should looks like this:

Day of Week | Start Time | End Time
monday         |      9:00     |  11:00
wednesday    |     10:00    |   12:00

Any advice?

Thanks

U must be seeing this:
Severe:   java.lang.IllegalArgumentException: Value is of invalid type, got java.lang.Integer but java.lang.String was expected

Because: 

tbl_schedule.addContainerProperty("dayOfWeek", String.class, null);

But u are putting an int

Object newId = tbl_schedule.addItem(new Object {
    schedule.getId(),
   [b] schedule.getDayOfWeek(), //according to your model, this is a primitive int value[/b]
    schedule.getStartTime(),
    schedule.getEndTime()},
null);