public NhLinqExpression(Expression expression)
{
_expression = PartialEvaluatingExpressionTreeVisitor.EvaluateIndependentSubtrees(expression);
_expression = NameUnNamedParameters.Visit(_expression);
_constantToParameterMap = ExpressionParameterVisitor.Visit(_expression);
ParameterValuesByName = _constantToParameterMap.Values.ToDictionary(p => p.Name,
p =>
new Tuple <object, IType>
{
First = p.Value, Second = p.Type
});
Key = ExpressionKeyVisitor.Visit(_expression, _constantToParameterMap);
Type = _expression.Type;
// Note - re-linq handles return types via the GetOutputDataInfo method, and allows for SingleOrDefault here for the ChoiceResultOperator...
ReturnType = NhLinqExpressionReturnType.Scalar;
if (typeof(IQueryable).IsAssignableFrom(Type))
{
Type = Type.GetGenericArguments()[0];
ReturnType = NhLinqExpressionReturnType.Sequence;
}
}
public static Expression Visit(Expression expression)
{
var visitor = new NameUnNamedParameters();
return visitor.VisitExpression(expression);
}