private OeDbEnumerator(OeDbEnumerator parentEnumerator, OeNavigationEntryFactory entryFactory)
{
ParentEnumerator = parentEnumerator;
Context = parentEnumerator.Context;
EntryFactory = entryFactory;
if (entryFactory.EdmNavigationProperty.Type.Definition is EdmCollectionType)
{
_uniqueConstraint = new HashSet <Object>(entryFactory.EqualityComparer);
}
Initialize();
}
public OeDbEnumerator GetFromPool(OeDbEnumerator parentEnumerator, OeNavigationEntryFactory entryFactory)
{
if (_pool.TryGetValue(entryFactory, out OeDbEnumerator? dbEnumerator))
{
dbEnumerator.Initialize();
}
else
{
dbEnumerator = new OeDbEnumerator(parentEnumerator, entryFactory);
_pool.Add(entryFactory, dbEnumerator);
}
return(dbEnumerator);
}
public IOeDbEnumerator CreateChild(OeNavigationEntryFactory entryFactory, CancellationToken cancellationToken)
{
IAsyncEnumerable <Object?> asyncEnumerable;
Object?navigationValue = entryFactory.GetValue(Current);
if (navigationValue is IEnumerable enumerable)
{
asyncEnumerable = Infrastructure.AsyncEnumeratorHelper.ToAsyncEnumerable(enumerable);
}
else
{
asyncEnumerable = Infrastructure.AsyncEnumeratorHelper.ToAsyncEnumerable(Task.FromResult(navigationValue));
}
IAsyncEnumerator <Object?> asyncEnumerator = asyncEnumerable.GetAsyncEnumerator(cancellationToken);
asyncEnumerator.MoveNextAsync().GetAwaiter().GetResult();
return(new OeEntityDbEnumerator(asyncEnumerator, entryFactory, this));
}
public IOeDbEnumerator CreateChild(OeNavigationEntryFactory entryFactory, CancellationToken cancellationToken)
{
return(Context.GetFromPool(this, entryFactory));
}
public OeEntityDbEnumerator(IAsyncEnumerator <Object?> asyncEnumerator, OeNavigationEntryFactory entryFactory, OeEntityDbEnumerator parentEnumerator)
: this(asyncEnumerator, entryFactory)
{
_parentEnumerator = parentEnumerator;
}
