private void HandleGroupBy(System.Linq.Expressions.MethodCallExpression m)
{
Linq.Visitors.Select.PostfixSelectVisitor svst = new Linq.Visitors.Select.PostfixSelectVisitor(row, s => NHEX.Projections.GroupProperty(s));
LambdaExpression lambda = (LambdaExpression)Linq.Utils.Expression.StripQuotes(m.Arguments[1]);
Expression exp = svst.Visit(lambda.Body);
//If there are no projection there is no more work to do.
if (svst.ListOfProjections.Count == 0)
{
return;
}
Translation.projector = Expression.Lambda(exp, row);
for (Int32 I = 0; I < svst.ListOfProjections.Count; ++I)
{
String projectedName = svst.ProjectionsPropertyNames[I];
projectedProperties.AddLast(projectedName);
if (projectedName.Contains("."))
{
rootCriteria.SetFetchMode(projectedName.Substring(0, projectedName.LastIndexOf('.')), FetchMode.Join);
}
Linq.Utils.NHibernate.AddProjectionToCriteria(
NHEX.Projections.GroupProperty(projectedName), rootCriteria);
}
//The m.type is the return value, it is an IEnumerable<IGrouping<T, S>>
//Linq.Utils.LinqGroupingResultTransformer transformer =
// new NHibernate.Linq.Utils.LinqGroupingResultTransformer(
// m.Type.GetGenericArguments()[0], svst.ProjectionsPropertyNames[0]);
//rootCriteria.SetResultTransformer(transformer);
}
/// <summary>
/// Handle the select part of an expression.
/// </summary>
/// <param name="m"></param>
private void HandleSelect(System.Linq.Expressions.MethodCallExpression m)
{
LambdaExpression lambda = (LambdaExpression)Linq.Utils.Expression.StripQuotes(m.Arguments[1]);
Linq.Visitors.Select.PostfixSelectVisitor svst = new Linq.Visitors.Select.PostfixSelectVisitor(row, s => NHEX.Projections.Property(s));
Expression exp = svst.Visit(lambda.Body);
//If there are no projection there is no more work to do.
if (svst.ListOfProjections.Count == 0)
{
return;
}
Translation.projector = Expression.Lambda(exp, row);
for (Int32 I = 0; I < svst.ListOfProjections.Count; ++I)
{
projectedProperties.AddLast(svst.ProjectionsPropertyNames[I]);
Linq.Utils.NHibernate.AddProjectionToCriteria(
svst.ListOfProjections[I], rootCriteria);
}
}