Implementing the database connections

The MIDlet implements the database connections with the following classes and interfaces:

• BookingTicket

  This class represents the booking returned by MovieDB from the sendBookingRequest method. It contains all information concerning a particular booking, such as price, code, and showing time.

• Movie

  This class contains information about a particular movie title, including a name and a poster for the movie. A Movie object contains a set of Showings.

• MovieDB

  This class abstracts the database and handles operations that require access to the database. The database contains a set of Movie objects.

  This class has the following functions:

  • Retrieving data

    The MIDlet implementation reads data from the MovieDB.properties file. However, in a real-life implementation, you want to establish a connection to a remote server in order to retrieve the data. In that case, you need to reconstruct the connection.

  • Implementing the ability to make a booking

• MovieDBEvent

  This class represents events triggered by MovieDB. Note that both events and objects with data can be passed.

• MovieDBListener

  This interface contains the handleEvent method, which is called when an interesting event happens. The handleEvent method in turn takes a MovieDBEvent object.

• Showing

  This class encapsulates a particular showing of a movie, including the date and time, seat distribution plan, and the price.