public Instrument Retrieve(string name)
{
Key key = new Key(typeof(Instrument), true);
key.Add("name", name);
Instrument anInstrument = Broker.SessionBroker.TryRetrieveInstance(
typeof(Instrument), key) as Instrument;
if (anInstrument != null)
return anInstrument;
throw new InstrumentDoesNotExistException("No existe un instrumento con ese nombre");
}
public Event Retrieve(int id)
{
Key key = new Key(typeof(Event), true);
key.Add("id", id);
Event anEvent = Broker.SessionBroker.TryRetrieveInstance(
typeof(Event), key) as Event;
if (anEvent != null)
return anEvent;
throw new EventDoesNotExistException();
}
public Person RetrieveById(int id)
{
// I look for a person by his DNI
Key key = new Key(typeof(Person), true);
key.Add("id", id);
Person aPerson = Broker.SessionBroker.TryRetrieveInstance(typeof(Person), key) as Person;
// If found, it's returned
if (aPerson != null)
return aPerson;
// the person who is looked for does not exist
throw new PersonDoesNotExistException("No existe una persona con ese Id");
}
public Event Retrieve(DateTime date)
{
// Seconds are not important
DateTime dateWithoutSeconds = new DateTime(date.Year, date.Month, date.Day,
date.Hour, date.Minute, 0);
Key key = new Key(typeof(Event), true);
key.Add("date", dateWithoutSeconds);
Event anEvent = Broker.SessionBroker.TryRetrieveInstance(
typeof(Event), key) as Event;
if (anEvent != null)
return anEvent;
throw new EventDoesNotExistException();
}
private Attendance Retrieve(Person aPerson, Event anEvent)
{
Key key = new Key(true);
key.Add("id_person", aPerson.Id);
key.Add("id_event", anEvent.Id);
Attendance anAttendance =
Broker.SessionBroker.TryRetrieveInstance(typeof(Attendance), key) as Attendance;
// If found, return it
if (anAttendance != null)
return anAttendance;
return null;
}