NHibernate IQueryOver.ToRowCountQuery() equivalent when Using HQL IQuery - nhibernate

Question

I'm trying to implement paging within my project.
When using NHibernate's IQueryOver syntax as shown below things are working as expected.
public PagedResult<T> ExecutePagedQuery(IQueryOver<T,T> query)
{
SetPaging(query);
var results = query.Future<T>();
var count = query.ToRowCountQuery().FutureValue<int>();
return new PagedResult<T>()
{
TotalItemCount = count.Value,
PageOfResults = results.ToList()
};
}
protected virtual void SetPaging(IQueryOver<T, T> query)
{
var maxResults = PageSize;
var numberToSkip = (PageNumber - 1) * PageSize;
query.Skip(numberToSkip).Take(maxResults);
}
For some queries we are using HQL instead of the IQueryOver syntax however.
I'm wondering if there is an equivalent to "query.ToRowCountQuery().FutureValue< int >()" that can be used when querying when passing an IQuery insead of an IQueryOver to provide the row count.
public PagedResult<T> ExecutePagedQuery(IQuery query)
{
SetPaging(query);
var results = query.Future<T>();
var count = // ToRowCountQueryEquivalent?
return new PagedResult<T>()
{
TotalItemCount = count,
PageOfResults = results.ToList()
};
}
protected virtual void SetPaging(IQuery query)
{
var maxResults = PageSize;
var numberToSkip = (PageNumber - 1) * PageSize;
query.SetFirstResult(numberToSkip);
query.SetMaxResults(maxResults);
}

Answer 1

some crazy idea
string countQuery;
if (query.QueryString.StartsWith("SELECT", StringComparison.OrdinalIgnoreCase))
countQuery = Regex.Replace(query.QueryString, "SELECT (.*) FROM", #"SELECT Count($1) FROM", RegexOptions.IgnoreCase);
else
countQuery = "SELECT COUNT(*) " + query.QueryString;

Answer 2

We've since converted our HQL queries to IQueryOver allowing us to take advantage of the ToRowCountQuery() helper.