/// <summary>
/// Attaches an entity to the ALinq.DataContext in either a modified or unmodified state.
/// </summary>
/// <param name="entity">The entity to be attached.</param>
/// <param name="asModified">True to attach the entity as modified.</param>
public void Attach(TEntity entity, bool asModified)
{
if (entity == null)
{
throw Error.ArgumentNull("entity");
}
CheckReadOnly();
context.CheckNotInSubmitChanges();
context.VerifyTrackingEnabled();
MetaType inheritanceType = metaTable.RowType.GetInheritanceType(entity.GetType());
if (!IsTrackableType(inheritanceType))
{
throw Error.TypeCouldNotBeTracked(inheritanceType.Type);
}
if (asModified && ((inheritanceType.VersionMember == null) && inheritanceType.HasUpdateCheck))
{
throw Error.CannotAttachAsModifiedWithoutOriginalState();
}
TrackedObject trackedObject = Context.Services.ChangeTracker.GetTrackedObject(entity);
if ((trackedObject != null) && !trackedObject.IsWeaklyTracked)
{
throw Error.CannotAttachAlreadyExistingEntity();
}
if (trackedObject == null)
{
trackedObject = context.Services.ChangeTracker.Track(entity, true);
}
if (asModified)
{
trackedObject.ConvertToModified();
}
else
{
trackedObject.ConvertToUnmodified();
}
if (Context.Services.InsertLookupCachedObject(inheritanceType, entity) != entity)
{
throw new DuplicateKeyException(entity, Strings.CantAddAlreadyExistingKey);
}
trackedObject.InitializeDeferredLoaders();
//TODO:SetDataContext
if (metaTable.RowType.HasAnySetDataContextMethod)
{
context.Services.SendSetDataContext(inheritanceType, entity, new object[] { this.context });
}
}
