Ik heb het antwoord van Needles uitgeprobeerd. Het is een heel goed antwoord, maar er zijn enkele wijzigingen nodig om het te laten functioneren (tenminste in .NET 4). Dit is wat ik heb bedacht voor mijn project:
Bijwerken: de volgende code kan worden gedownload op GitHub en zal daar worden bijgewerkt. NHiberntate.HierarchyId.UserType
SqlHierarchyId IUserType
namespace NHibernate.UserTypes
{
using SqlTypes;
using System;
using System.Data;
using System.Data.SqlTypes;
using Microsoft.SqlServer.Types;
public class HierarchyId : IUserType
{
#region Properties
public SqlType[] SqlTypes
{
get { return new[] { NHibernateUtil.String.SqlType }; }
}
public Type ReturnedType
{
get { return typeof(SqlHierarchyId); }
}
public bool IsMutable
{
get { return true; }
}
#endregion Properties
#region Methods
new public bool Equals(object x, object y)
{
if (ReferenceEquals(x, y)) return true;
if (x == null || y == null) return false;
return x.Equals(y);
}
public int GetHashCode(object x)
{
return x.GetHashCode();
}
public object NullSafeGet(IDataReader rs, string[] names, object owner)
{
object prop1 = NHibernateUtil.String.NullSafeGet(rs, names[0]);
if (prop1 == null) return null;
return SqlHierarchyId.Parse(new SqlString(prop1.ToString()));
}
public void NullSafeSet(IDbCommand cmd, object value, int index)
{
if (value == null)
((IDataParameter)cmd.Parameters[index]).Value = DBNull.Value;
else if (value is SqlHierarchyId)
((IDataParameter)cmd.Parameters[index]).Value = ((SqlHierarchyId)value).ToString();
}
public object DeepCopy(object value)
{
if (value == null) return null;
return SqlHierarchyId.Parse(((SqlHierarchyId)value).ToString());
}
public object Replace(object original, object target, object owner)
{
return DeepCopy(original);
}
public object Assemble(object cached, object owner)
{
return DeepCopy(cached);
}
public object Disassemble(object value)
{
return DeepCopy(value);
}
#endregion Methods
}
}
Kaart
<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2" assembly="DataLayer" namespace="NHibernate.Map">
<class name="NHibernate.Map.OrganizationUnit, DataLayer" table="`orgunit`">
<property name="HierarchyId" column="`ou_hid`" type="NHibernate.UserTypes.HierarchyId, DataLayer" />
...
</class>
</hibernate-mapping>
Object met HierarchyId
namespace NHibernate.Map
{
using Microsoft.SqlServer.Types;
public class OrganizationUnit
{
#region Fields
private SqlHierarchyId _hierarchyId;
...
#endregion Fields
#region Properties
public virtual SqlHierarchyId HierarchyId
{
get { return _hierarchyId; }
set { _hierarchyId = value; }
}
...
#endregion Properties
}
}