public static ISelector <T> BuildSelector <T>(this IDocumentSchema schema, IQueryableDocument mapping, QueryModel query)
{
var selectable = query.AllResultOperators().OfType <ISelectableOperator>().FirstOrDefault();
if (selectable != null)
{
return(selectable.BuildSelector <T>(schema, mapping));
}
if (query.SelectClause.Selector.Type == query.SourceType())
{
if (typeof(T) == typeof(string))
{
return((ISelector <T>) new JsonSelector());
}
// I'm so ashamed of this hack, but "simplest thing that works"
if (typeof(T) == typeof(IEvent))
{
return(mapping.As <EventQueryMapping>().Selector.As <ISelector <T> >());
}
var resolver = schema.ResolverFor <T>();
return(new WholeDocumentSelector <T>(mapping, resolver));
}
var visitor = new SelectorParser(query);
visitor.Visit(query.SelectClause.Selector);
return(visitor.ToSelector <T>(schema, mapping));
}
public static ISelector <T> ChooseSelector <T>(string dataLocator, IDocumentSchema schema, IQueryableDocument mapping, QueryModel query, SelectManyQuery subQuery, IIncludeJoin[] joins)
{
// I'm so ashamed of this hack, but "simplest thing that works"
if (typeof(T) == typeof(IEvent))
{
return(mapping.As <EventQueryMapping>().Selector.As <ISelector <T> >());
}
var selectable = query.AllResultOperators().OfType <ISelectableOperator>().FirstOrDefault();
if (selectable != null)
{
return(selectable.BuildSelector <T>(dataLocator, schema, mapping));
}
if (subQuery != null)
{
return(subQuery.ToSelector <T>(schema.StoreOptions.Serializer(), joins));
}
if (query.SelectClause.Selector.Type == query.SourceType())
{
if (typeof(T) == typeof(string))
{
return((ISelector <T>) new JsonSelector());
}
if (typeof(T) != query.SourceType())
{
// TODO -- going to have to come back to this one.
// think this is related to hierarchical documents
return(null);
}
var resolver = schema.ResolverFor <T>();
return(new WholeDocumentSelector <T>(mapping, resolver));
}
var visitor = new SelectorParser(query);
visitor.Visit(query.SelectClause.Selector);
return(visitor.ToSelector <T>(dataLocator, schema, mapping));
}