I was looking through my NHibernate logs and noticed that on one of my classes, CodeDOM compilation seems to be failing. The class in question uses several nullables, and these are the properties that seem to be causing the problem. A sample of the offending code (this is taken from my log file, see below for the entire file) is as follows:



This produces the following error:


Hibernate version: 1.0.3.0

Edit: the forum is truncating the log. I'll try post the relevant part as a reply.

2006-12-27 04:51:49,343 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Init compiler for class data.Item
2006-12-27 04:51:49,343 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Adding referenced assembly C:\WINDOWS\assembly\GAC\NHibernate\1.0.2.0__154fdcb44c4484fc\NHibernate.dll
2006-12-27 04:51:49,343 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Adding referenced assembly C:\Documents and Settings\David\My Documents\Visual Studio 2005\Projects\rmedInventory\trunk\inventory\bin\Debug\data.dll
2006-12-27 04:51:49,343 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Adding referenced assembly C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\mscorlib.dll
2006-12-27 04:51:49,343 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Adding referenced assembly C:\WINDOWS\assembly\GAC_32\System.Data\2.0.0.0__b77a5c561934e089\System.Data.dll
2006-12-27 04:51:49,343 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Adding referenced assembly C:\WINDOWS\assembly\GAC_MSIL\nunit.framework\2.2.8.0__96d09a1eb7f44a77\nunit.framework.dll
2006-12-27 04:51:49,343 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Adding referenced assembly C:\WINDOWS\assembly\GAC_MSIL\System\2.0.0.0__b77a5c561934e089\System.dll
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Compiled with error:
using System;
using NHibernate.Property;
namespace NHibernate.Persister {
public class GetSetHelper_data_Item : IGetSetHelper {
ISetter[] setters;
IGetter[] getters;
public GetSetHelper_data_Item(ISetter[] setters, IGetter[] getters) {
this.setters = setters;
this.getters = getters;
}
public void SetPropertyValues(object obj, object[] values) {
data.Item t = (data.Item)obj;
try
{
t.Vendor = (data.Vendor)values[0];
t.Amount = values[1] == null ? new System.Decimal() : (System.Decimal)values[1];
t.LastChange = values[2] == null ? new System.Nullable`1[[System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]() : (System.Nullable`1[[System.DateTime, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]])values[2];
t.Purity = values[3] == null ? new System.Nullable`1[[System.Double, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]() : (System.Nullable`1[[System.Double, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]])values[3];
t.CASNum = (data.CASNum)values[4];
t.CatNum = (System.String)values[5];
snip several similar lines of code
setters[20].Set(obj, values[20]);
}
catch( InvalidCastException ice )
{
throw new MappingException(
"Invalid mapping information specified for type " + obj.GetType() + ", check your mapping file for property type mismatches",
ice);
}
}
public object[] GetPropertyValues(object obj) {
data.Item t = (data.Item)obj;
object[] ret = new object[21];
ret[0] = t.Vendor;
ret[1] = t.Amount;
ret[2] = t.LastChange;
ret[3] = t.Purity;
ret[4] = t.CASNum;
ret[5] = t.CatNum;
snip several similar lines of code
ret[20] = getters[20].Get(obj);
return ret;
}
}
}

2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:17, Column:57 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:17, Column:176 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:18, Column:53 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:18, Column:170 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:21, Column:60 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:21, Column:178 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:22, Column:63 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:22, Column:179 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:24, Column:52 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:24, Column:170 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:27, Column:62 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:27, Column:178 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:29, Column:61 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:29, Column:180 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:33, Column:58 Message:Unexpected character '`'
2006-12-27 04:51:49,453 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Line:33, Column:174 Message:Unexpected character '`'
2006-12-27 04:51:49,468 [5308] INFO NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - Disabling reflection optimizer for class data.Item
2006-12-27 04:51:49,468 [5308] DEBUG NHibernate.Persister.GetSetHelperFactory [(null)] <(null)> - CodeDOM compilation failed
System.InvalidOperationException: Unexpected character '`'
at NHibernate.Persister.GetSetHelperFactory.Build(String code)
at NHibernate.Persister.GetSetHelperFactory.CreateGetSetHelper()

I'm encountering exactly the same problem using NHibernate version 1.0.4.
I'd like to know if there is a solutions/workaround available for this problem.
Cheers, Peter

This is a known problem. Either disable the optimizer (set hibernate.use_reflection_optimizer to false in app.config/web.config) or upgrade to NHibernate 1.2 which uses a different implementation.