static QueryFilterAttribute()
{
ToFutureMethod =
ReflectHelper.GetMethodDefinition(() => LinqExtensionMethods.ToFuture <object>(null))
.GetGenericMethodDefinition();
ToFutureValueMethod =
ReflectHelper.GetMethodDefinition(() => LinqExtensionMethods.ToFutureValue <object, object>(null, null))
.GetGenericMethodDefinition();
GetCountExpressionMethod = ReflectHelper.GetMethodDefinition <QueryFilterAttribute>(o => o.GetCountExpression <object>())
.GetGenericMethodDefinition();
}
/// <summary>
/// Gets the result of the query as an <see cref="IList{T}"/>, but lazily so
/// that the data-source will not be contacted until the value is retrieved.
/// </summary>
/// <returns>The lazy query result.</returns>
/// <param name="query">The query.</param>
/// <typeparam name="T">The type of object queried.</typeparam>
public Lazy <IList <T> > GetLazyList <T>(IQueryable <T> query)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
if (!(query.Provider is NhQueryProvider))
{
throw new ArgumentException($"The query provider must be an instance of {typeof(NhQueryProvider).FullName}.", nameof(query));
}
var futureEnumerable = LinqExtensionMethods.ToFuture(query);
return(new Lazy <IList <T> >(() => futureEnumerable.ToList()));
}
public IEnumerable <T> ToFuture <T>(IQueryable <T> queryable)
{
var query = LinqExtensionMethods.ToFuture(queryable);
return(query);
}