private static EntityMap CreateEntityMap <TEntity>(ObjectQuery query)
{
Type entityType = typeof(TEntity);
ObjectContext objectContext = query.Context;
var modelSet = objectContext.GetEntitySet <TEntity>();
if (modelSet == null)
{
return(null);
}
var entityMap = new EntityMap(entityType);
entityMap.ModelSet = modelSet;
entityMap.ModelType = entityMap.ModelSet.ElementType;
var metadata = objectContext.MetadataWorkspace;
// force metadata to load
dynamic dbProxy = new DynamicProxy(objectContext);
dbProxy.EnsureMetadata();
ItemCollection itemCollection;
if (!metadata.TryGetItemCollection(DataSpace.CSSpace, out itemCollection))
{
// force CSSpace to load
query.ToTraceString();
// try again
metadata.TryGetItemCollection(DataSpace.CSSpace, out itemCollection);
}
if (itemCollection == null)
{
return(null);
}
dynamic mappingFragmentProxy = FindMappingFragment(itemCollection, entityMap.ModelSet);
if (mappingFragmentProxy == null)
{
return(null);
}
// SModel
entityMap.StoreSet = mappingFragmentProxy.TableSet;
entityMap.StoreType = entityMap.StoreSet.ElementType;
SetProperties(entityMap, mappingFragmentProxy);
SetKeys(entityMap);
SetTableName(entityMap);
return(entityMap);
}
