Substitute a MemberExpression by another Domain Specific Expression

[Jordi Cabré]

I'm trying to transform a Linq Expression on WhereClause to another domain specific expression.

This is Linq sentence I'm trying to analyze:

            IEnumerable<TClass> classes = Provider.LivingQueryFactory.CreateLinqQuery<TClass>().Where(tc => tc.Name.EndsWith(string.Empty));

            var projectedClasses = from tc in classes select new { PrimaName = tc.Name, SecondName = tc.Name };

            foreach (var c in projectedClasses)

            {

                Console.WriteLine(c.PrimaName);

            }

So, WhereClause contains: tc => tc.Name.EndsWith(string.Empty).

I'm trying to set tc.Name to a DSLFieldExpression that I want it contains the fieldname = "Name" and fieldType = String:

    internal class DSLFieldExpression : Expression

    {

        private readonly string fieldName;

        private Type fieldType;
    }

I've created a ExpressionVisitor inherits from ReLinqExpressionVisitor in order to visit a member:

    internal class QuerySourceReferencePropertyTransformingTreeVisitor : RelinqExpressionVisitor

    {

        private MemberExpression parent;

        private DSLFieldExpression queryField;

        protected override Expression VisitMember(MemberExpression expression)

        {

            parent = expression;

            var result = base.VisitMember(expression);

            return queryField ?? result;

        }

        protected override Expression VisitQuerySourceReference(QuerySourceReferenceExpression expression)

        {

            var propertyInfo = parent.Member as PropertyInfo;

            if (propertyInfo == null)

            {

                throw new NotSupportedException("Only MemberExpression of type PropertyInfo may be used on QuerySourceReferenceExpression.");

            }

            var propertyType = propertyInfo.PropertyType;

            if (propertyType.IsEnum)

            {

                propertyType = Enum.GetUnderlyingType(propertyType);

            }

            queryField = new DSLFieldExpression (propertyInfo.Name, propertyType);

            return base.VisitQuerySourceReference(expression);

        }

    }

However, VisitQuerySourceReference is never performed.

Any ideas?