Android Room Entity inheritance

Question

I've already seen a threads similar to this, but none of them answers my question.

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So let's say we have two classes:

• Lesson
• Break

Both of them are implementing SchoolEntity interface, which has the following methods:

1. Date getStartDate()
2. Date getEndDate()

Break class does nothing beside implementing this interface, but Lesson has additional fields and getters, like:

1. subject
2. room
3. teacher, etc.

Now I want to save instance of SchoolEntity using Android's Room Persistence Library.

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This is the List I want to be saved:

List<SchoolEntity> timetable:
 1. Lesson@13da43:
    - Date startDate = Date@ha94j8
    - Date endDate = Date@9kf8kf
    - String subject = "math"
    - String room = "124"
    - String teacher = "Joseph Fold"
 2. Break@j7gfsd:
    - Date startDate = Date@738291
    - Date endDate = Date@fj8fjn

And I want it to be saved in SQL Database like this:

+----------------------+---------------------+--------+---------+------+-------------+
| start_date           | end_date            | type   | subject | room | teacher     |
+----------------------+---------------------+--------+---------+------+-------------+
| 2019.01.12 08:00:00  | 2019.01.12 08:45:00 | LESSON | math    | 124  | Joseph Fold |
| 2019.01.12 08:45:00  | 2019.01.12 08:55:00 | BREAK  | NULL    | NULL | NULL        |
+----------------------+---------------------+--------+---------+------+-------------+

Note: start_date is primary key

And finally I want to be able to retrive saved information as:

LiveData<List<SchoolEntity>> timetable

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My question is:

Am I able to do this using Android's Room Persistence Library? If so, how to achieve it? If no what should I use instead?

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My language is Java, but Kotlin will also make me.