private Expression CreateComparsion(Expression x, Expression y, SortOrder ordering)
{
MethodInfo compareMethod =
ReflectionHelper.GetStaticMethodInfo(() =>
PrimitiveKeyComparer.Compare <object>(null, null, SortOrder.Ascending));
compareMethod = compareMethod
.GetGenericMethodDefinition()
.MakeGenericMethod(x.Type);
return(Expression.Call(
compareMethod,
x,
y,
Expression.Constant(ordering, typeof(SortOrder))));
}
public int Compare(T x, T y)
{
return(PrimitiveKeyComparer.Compare <T>(x, y, this.sortOrder));
}