internal void ChangeState(RecordStateTransitions transition, bool saveInTransaction = false)
{
this.RecordState = GetChangedState(this.RecordState, transition);
if (!saveInTransaction)
{
this.RollbackedState = GetChangedState(this.RollbackedState, transition);
}
}
static RecordState GetChangedState(RecordState state, RecordStateTransitions transition)
{
switch (state)
{
case RecordState.Added:
switch (transition)
{
case RecordStateTransitions.Save:
return(RecordState.Unchanged);
case RecordStateTransitions.Delete:
case RecordStateTransitions.Detach:
return(RecordState.Detached);
case RecordStateTransitions.Modify:
return(RecordState.Added);
case RecordStateTransitions.Attach:
throw new InvalidOperationException();
}
break;
case RecordState.Modified:
switch (transition)
{
case RecordStateTransitions.Save:
return(RecordState.Unchanged);
case RecordStateTransitions.Delete:
return(RecordState.Deleted);
case RecordStateTransitions.Modify:
return(RecordState.Modified);
case RecordStateTransitions.Attach:
throw new InvalidOperationException();
case RecordStateTransitions.Detach:
return(RecordState.Detached);
}
break;
case RecordState.Deleted:
switch (transition)
{
case RecordStateTransitions.Save:
case RecordStateTransitions.Detach:
return(RecordState.Detached);
case RecordStateTransitions.Delete:
throw new InvalidOperationException();
case RecordStateTransitions.Modify:
return(RecordState.Deleted);
case RecordStateTransitions.Attach:
return(RecordState.Modified);
}
break;
case RecordState.Unchanged:
switch (transition)
{
case RecordStateTransitions.Save:
return(RecordState.Unchanged);
case RecordStateTransitions.Delete:
return(RecordState.Deleted);
case RecordStateTransitions.Modify:
return(RecordState.Modified);
case RecordStateTransitions.Attach:
throw new InvalidOperationException();
case RecordStateTransitions.Detach:
return(RecordState.Detached);
}
break;
case RecordState.Detached:
switch (transition)
{
case RecordStateTransitions.Save:
case RecordStateTransitions.Delete:
throw new InvalidOperationException();
case RecordStateTransitions.Attach:
return(RecordState.Added);
case RecordStateTransitions.Modify:
case RecordStateTransitions.Detach:
return(RecordState.Detached);
}
break;
}
throw new NotSupportedException();
}
