/// <summary>
/// Returns the EntityGroup associated with a specific Entity subtype.
/// </summary>
/// <param name="clrEntityType">An <see cref="IEntity"/> subtype</param>
/// <returns>The <see cref="EntityGroup"/> associated with the specified Entity subtype</returns>
/// <exception cref="ArgumentException">Bad entity type</exception>
/// <exception cref="EntityServerException"/>
internal EntityGroup GetEntityGroup(Type clrEntityType)
{
var eg = this.EntityGroups[clrEntityType];
if (eg != null)
{
return(eg);
}
lock (this.EntityGroups) {
// check again just in case another thread got in.
eg = this.EntityGroups[clrEntityType];
if (eg != null)
{
return(eg);
}
eg = EntityGroup.Create(clrEntityType, this);
this.EntityGroups.Add(eg);
// ensure that any entities placed into the table on initialization are
// marked so as not to be saved again
eg.AcceptChanges();
return(eg);
}
}
private void AddEntityGroup(EntityGroup entityGroup)
{
// don't both checking if an entityGroup with the same key already exists
// should have been checked in calling code ( and will fail in the Add if not)
entityGroup.EntityManager = this;
entityGroup.EntityType = this.MetadataStore.GetEntityType(entityGroup.ClrType);
// insure that any added table can watch for change events
entityGroup.ChangeNotificationEnabled = true;
this.EntityGroups.Add(entityGroup);
}