private static EntityQuery AddWhereClause(EntityQuery entityQuery, LambdaExpression lambda)
{
// This works too - not sure which is faster or better
//var method = factory.GetType().GetMethod("Where", new Type[] { typeof(LambdaExpression) });
//var query = method.Invoke(factory, new Object[] { lambda });
//return (EntityQuery)query;
var expr = BuildCallWhereExpr(entityQuery, lambda);
var query = (EntityQuery)TypeFns.ConstructGenericInstance(typeof(EntityQuery <>),
new Type[] { entityQuery.ElementType },
expr, entityQuery);
return(query);
}
/// <summary>
/// Internal use only - part of <see cref="IQueryProvider"/> implementation.
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
IQueryable IQueryProvider.CreateQuery(Expression expression)
{
// Not sure when this is called but it IS called on OfType() resolution
var methodExpr = (MethodCallExpression)expression;
// return type will be an IQueryable<X>
var returnType = methodExpr.Method.ReturnType;
// extract X
var typeT = TypeFns.GetGenericArgument(returnType);
// now do the equivalent of => return new EntityQuery<{typeT}>(expression, this);
var query = TypeFns.ConstructGenericInstance(typeof(EntityQuery <>), new Type[] { typeT },
expression, this);
return((IQueryable)query);
}