public IObjectActivator CreateObjectActivator(IDbContext dbContext)
{
EntityMemberMapper mapper = this.ConstructorDescriptor.GetEntityMemberMapper();
List<IValueSetter> memberSetters = new List<IValueSetter>(this.Members.Count + this.EntityMembers.Count);
foreach (var kv in this.Members)
{
IMRM mMapper = mapper.GetMemberMapper(kv.Key);
MappingMemberBinder binder = new MappingMemberBinder(mMapper, kv.Value);
memberSetters.Add(binder);
}
foreach (var kv in this.EntityMembers)
{
Action<object, object> del = mapper.GetNavigationMemberSetter(kv.Key);
IObjectActivator memberActivtor = kv.Value.CreateObjectActivator();
NavigationMemberBinder binder = new NavigationMemberBinder(del, memberActivtor);
memberSetters.Add(binder);
}
Func<IDataReader, ReaderOrdinalEnumerator, ObjectActivatorEnumerator, object> instanceCreator = this.ConstructorDescriptor.GetInstanceCreator();
List<int> readerOrdinals = this.ConstructorParameters.Select(a => a.Value).ToList();
List<IObjectActivator> objectActivators = this.ConstructorEntityParameters.Select(a => a.Value.CreateObjectActivator()).ToList();
ObjectActivator ret;
if (dbContext != null)
ret = new ObjectActivatorWithTracking(instanceCreator, readerOrdinals, objectActivators, memberSetters, this.CheckNullOrdinal, dbContext);
else
ret = new ObjectActivator(instanceCreator, readerOrdinals, objectActivators, memberSetters, this.CheckNullOrdinal);
return ret;
}
public virtual object CreateInstance(IDataReader reader)
{
if (this._checkNullOrdinal != null)
{
if (reader.IsDBNull(this._checkNullOrdinal.Value))
{
return(null);
}
}
this._readerOrdinalEnumerator.Reset();
this._objectActivatorEnumerator.Reset();
object obj = null;
try
{
obj = this._instanceCreator(reader, this._readerOrdinalEnumerator, this._objectActivatorEnumerator);
}
catch (Exception ex)
{
if (this._readerOrdinalEnumerator.CurrentOrdinal >= 0)
{
throw new DataException(AppendErrorMsg(reader, this._readerOrdinalEnumerator.CurrentOrdinal), ex);
}
throw;
}
IValueSetter memberSetter = null;
try
{
int count = this._memberSetters.Count;
for (int i = 0; i < count; i++)
{
memberSetter = this._memberSetters[i];
memberSetter.SetValue(obj, reader);
}
}
catch (Exception ex)
{
MappingMemberBinder binder = memberSetter as MappingMemberBinder;
if (binder != null)
{
throw new DataException(AppendErrorMsg(reader, binder.Ordinal), ex);
}
throw;
}
return(obj);
}
