public EntityDataReader(IEnumerable <T> col, EntityDataReaderOptions options, ObjectContext objectContext)
{
this.enumerator = col.GetEnumerator();
this.options = options;
if (options.RecreateForeignKeysForEntityFrameworkEntities && objectContext == null)
{
throw new ArgumentException("If RecreateForeignKeysForEntityFrameworkEntities=true then objectContext is required");
}
//done without a lock, so we risk running twice
if (scalarAttributes == null)
{
scalarAttributes = DiscoverScalarAttributes(typeof(T));
}
if (options.FlattenRelatedObjects && scalarAttributesPlusRelatedObjectScalarAttributes == null)
{
var atts = DiscoverRelatedObjectScalarAttributes(typeof(T));
scalarAttributesPlusRelatedObjectScalarAttributes = atts.Concat(scalarAttributes).ToList();
}
if (options.RecreateForeignKeysForEntityFrameworkEntities && scalarAttributesPlusRelatedObjectKeyAttributes == null)
{
var atts = DiscoverRelatedObjectKeyAttributes(typeof(T), objectContext);
scalarAttributesPlusRelatedObjectKeyAttributes = atts.Concat(scalarAttributes).ToList();
}
if (options.FlattenRelatedObjects)
{
this.attributes = scalarAttributesPlusRelatedObjectScalarAttributes;
}
else if (objectContext != null)
{
this.attributes = scalarAttributesPlusRelatedObjectKeyAttributes;
}
else
{
this.attributes = scalarAttributes;
}
}
/// <summary>
/// Wraps the IEnumerable in a DbDataReader, having one column for each "scalar" property of the type T.
/// The collection will be enumerated as the client calls IDataReader.Read().
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="collection"></param>
/// <returns></returns>
public static IDataReader AsDataReader <T>(this IEnumerable <T> collection, bool exposeNullableColumns, bool flattenRelatedObjects)
{
var options = new EntityDataReaderOptions(exposeNullableColumns, flattenRelatedObjects, true, false);
return(new EntityDataReader <T>(collection, options, null));
}
public EntityDataReader(IEnumerable <T> col, EntityDataReaderOptions options)
: this(col, options, null)
{
}