Example #1
0
        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);
        }
Example #2
0
        /// <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);
            }
        }