/// <summary>
/// Creates a group join include used to describe an Include operation that should
/// be performed as part of a GroupJoin.
/// </summary>
/// <param name="navigationPath"> The included navigation path. </param>
/// <param name="querySourceRequiresTracking"> true if this query source requires tracking. </param>
/// <param name="existingGroupJoinInclude"> A possibly null existing group join include. </param>
/// <param name="relatedEntitiesLoaders"> The related entities loaders. </param>
/// <returns>
/// A new group join include.
/// </returns>
public virtual object CreateGroupJoinInclude(
IReadOnlyList <INavigation> navigationPath,
bool querySourceRequiresTracking,
object existingGroupJoinInclude,
object relatedEntitiesLoaders)
{
Check.NotNull(navigationPath, nameof(navigationPath));
Check.NotNull(relatedEntitiesLoaders, nameof(relatedEntitiesLoaders));
var previousGroupJoinInclude
= new AsyncGroupJoinInclude(
navigationPath,
(IReadOnlyList <Func <QueryContext, IAsyncRelatedEntitiesLoader> >)relatedEntitiesLoaders,
querySourceRequiresTracking);
var groupJoinInclude = existingGroupJoinInclude as AsyncGroupJoinInclude;
if (groupJoinInclude != null)
{
groupJoinInclude.SetPrevious(previousGroupJoinInclude);
return(null);
}
return(previousGroupJoinInclude);
}
private static IAsyncEnumerable <TResult> _GroupJoin <TOuter, TInner, TKey, TResult>(
RelationalQueryContext queryContext,
IAsyncEnumerable <ValueBuffer> source,
IShaper <TOuter> outerShaper,
IShaper <TInner> innerShaper,
Func <TInner, TKey> innerKeySelector,
Func <TOuter, IAsyncEnumerable <TInner>, TResult> resultSelector,
AsyncGroupJoinInclude outerGroupJoinInclude,
AsyncGroupJoinInclude innerGroupJoinInclude)
=> new GroupJoinAsyncEnumerable <TOuter, TInner, TKey, TResult>(
queryContext,
source,
outerShaper,
innerShaper,
innerKeySelector,
resultSelector,
outerGroupJoinInclude,
innerGroupJoinInclude);
public GroupJoinAsyncEnumerable(
RelationalQueryContext queryContext,
IAsyncEnumerable <ValueBuffer> source,
IShaper <TOuter> outerShaper,
IShaper <TInner> innerShaper,
Func <TInner, TKey> innerKeySelector,
Func <TOuter, IAsyncEnumerable <TInner>, TResult> resultSelector,
AsyncGroupJoinInclude outerGroupJoinInclude,
AsyncGroupJoinInclude innerGroupJoinInclude)
{
_queryContext = queryContext;
_source = source;
_outerShaper = outerShaper;
_innerShaper = innerShaper;
_innerKeySelector = innerKeySelector;
_resultSelector = resultSelector;
_outerGroupJoinInclude = outerGroupJoinInclude;
_innerGroupJoinInclude = innerGroupJoinInclude;
}
