private void MaterializeSelf()
{
if (materializedSequence != null)
{
return;
}
materializedSequence = delayedSequence.ToList();
delayedSequence = null;
}
// Constructors
// ReSharper disable MemberCanBeProtected.Global
public SubQuery(ProjectionExpression projectionExpression, TranslatedQuery query, Parameter <Tuple> parameter, Tuple tuple, ItemMaterializationContext context)
// ReSharper restore MemberCanBeProtected.Global
{
this.provider = context.Session.Query.Provider;
var tupleParameterBindings = new Dictionary <Parameter <Tuple>, Tuple>(projectionExpression.TupleParameterBindings);
var currentTranslatedQuery = ((TranslatedQuery <IEnumerable <TElement> >)query);
// Gather Parameter<Tuple> values from current ParameterScope for future use.
parameter.Value = tuple;
foreach (var tupleParameter in currentTranslatedQuery.TupleParameters)
{
var value = tupleParameter.Value;
tupleParameterBindings[tupleParameter] = value;
}
var parameterContext = new ParameterContext();
using (parameterContext.Activate())
foreach (var tupleParameter in currentTranslatedQuery.TupleParameters)
{
tupleParameter.Value = tupleParameter.Value;
}
this.projectionExpression = new ProjectionExpression(
projectionExpression.Type,
projectionExpression.ItemProjector,
tupleParameterBindings,
projectionExpression.ResultType);
var translatedQuery = new TranslatedQuery <IEnumerable <TElement> >(
query.DataSource,
(Func <IEnumerable <Tuple>, Session, Dictionary <Parameter <Tuple>, Tuple>, ParameterContext, IEnumerable <TElement> >)query.UntypedMaterializer,
tupleParameterBindings,
EnumerableUtils <Parameter <Tuple> > .Empty);
delayedSequence = new DelayedSequence <TElement>(context.Session, translatedQuery, parameterContext);
context.Session.RegisterUserDefinedDelayedQuery(delayedSequence.Task);
context.MaterializationContext.MaterializationQueue.Enqueue(MaterializeSelf);
}
