private IFutureValue <T> ExecuteQueryTreeFutureValue <T>(Expression queryExpression)
{
var tree = new QueryRelationTree();
IFutureValue <T> result = null;
foreach (var path in IncludePaths)
{
tree.AddNode(path);
}
var leafs = tree.GetLeafs();
leafs.Sort();
var expressions = leafs.Aggregate(new ExpressionInfo(queryExpression), FetchFromPath).GetExpressions();
var i = 0;
foreach (var expression in expressions)
{
if (i == 0)
{
result = _queryProvider.ExecuteFutureValue <T>(expression);
}
else
{
_queryProvider.ExecuteFuture <T>(expression);
}
i++;
}
return(result);
}
private List <Expression> GetExpressions(Expression queryExpression)
{
IClassMetadata meta;
var metas = Session.Factory.GetAllClassMetadata()
.Select(o => o.Value)
.Where(o => Type.IsAssignableFrom(o.MappedClass))
.ToList();
if (!metas.Any())
{
throw new HibernateException($"Metadata for type '{Type}' was not found");
}
if (metas.Count > 1)
{
meta = metas.FirstOrDefault(o => o.MappedClass == Type);
if (meta == null)
{
throw new HibernateException(
$"Unable to find the the correct candidate for type '{Type}'. Candidates: {string.Join(", ", metas.Select(o => o.MappedClass))}");
}
}
else
{
meta = metas.First();
}
var tree = new QueryRelationTree();
foreach (var path in IncludePaths)
{
tree.AddNode(path);
}
var leafs = tree.GetLeafs();
leafs.Sort();
return(leafs.Aggregate(new ExpressionInfo(queryExpression, meta), FetchFromPath).GetExpressions());
}
