/// <summary>
/// Used by the query provider to materialize database objects
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="builder"></param>
/// <returns></returns>
public List <T> GetObjectsFromDb <T>(ISqlStatementBuilder builder)
{
var selectResults = _dbDriver.RunSelectStatement(builder.SelectStatement);
var objects = new List <T>();
foreach (var result in selectResults)
{
var myObject = MaterializeObject <T>(result);
var id = GetId(myObject);
var possiblyExistingObject = ChangeTracker.GetEntry(id, typeof(T))?.Item;
var objectIsNew = possiblyExistingObject == null;
if (!objectIsNew)
{
objects.Add((T)possiblyExistingObject);
continue;
}
var changeTrackerEntry = new ChangeTrackerEntry
{
State = ChangeTrackerEntry.States.Unmodified,
Item = myObject,
};
changeTrackerEntry.UpdateOriginals(myObject);
ChangeTracker.AddEntry(changeTrackerEntry);
objects.Add(myObject);
}
return(objects);
}
public void AddEntry_NoItem_ThrowsException()
{
var entry = new ChangeTrackerEntry();
IChangeTracker changeTracker = new ChangeTracker();
Should.Throw <Exception>(() => changeTracker.AddEntry(entry));
}
/// <summary>
/// Used to add objects to the ORM
/// </summary>
/// <param name="objectToInsert"></param>
public void Insert(object objectToInsert)
{
SetId(objectToInsert, --_insertionId);
var changeTrackerEntry = new ChangeTrackerEntry
{
State = ChangeTrackerEntry.States.Inserted,
Item = objectToInsert,
};
changeTrackerEntry.UpdateOriginals(objectToInsert);
ChangeTracker.AddEntry(changeTrackerEntry);
}
public void ModifiedObjects_HaveBeenAdded_ReturnEntries()
{
var myObject = new object();
var entry = new ChangeTrackerEntry
{
Item = myObject,
State = ChangeTrackerEntry.States.Modified
};
IChangeTracker changeTracker = new ChangeTracker();
changeTracker.AddEntry(entry);
changeTracker.ModifiedObjects.Single().ShouldBe(myObject);
}
public void AddEntry_HasItem_ContainsEntry()
{
var myObject = new object();
var entry = new ChangeTrackerEntry
{
Item = myObject
};
IChangeTracker changeTracker = new ChangeTracker();
changeTracker.AddEntry(entry);
changeTracker.Count.ShouldBe(1);
changeTracker.Entries.Single().Item.ShouldBe(myObject);
}
public void GetEntryByObject_EntryExists_CorrectEntry()
{
var myObject = new object();
var entry = new ChangeTrackerEntry
{
Item = myObject
};
IChangeTracker changeTracker = new ChangeTracker();
changeTracker.AddEntry(entry);
var retrievedEntry = changeTracker.GetEntry(myObject);
retrievedEntry.ShouldBe(entry);
retrievedEntry.Item.ShouldBe(myObject);
}