Here you go.
Some methods I have not implemented because I don't know that they are for..
public class XmlClassType<T> : IUserType where T : ICloneable
{
public virtual new bool Equals(object x, object y)
{
if (x != null) return x.Equals(y);
else if (y != null) return y.Equals(x);
else return true;
}
public object NullSafeGet(IDataReader rs, string[] names, object owner)
{
if (names.Length != 1)
throw new InvalidOperationException("names array has more than one element. can't handle this!");
XmlDocument document = new XmlDocument();
string val = rs[names[0]] as string;
if (val != null)
{
document.LoadXml(val);
return Load(document);
}
return null;
}
protected virtual XmlDocument Save(T data)
{
return SaveValue(data);
}
protected virtual XmlDocument SaveValue(object data)
{
using (MemoryStream stream = new MemoryStream())
{
Type type = data.GetType();
XmlWriter writer = new XmlTextWriter(stream, Encoding.Unicode);
XmlSerializer serializer = new XmlSerializer(type);
serializer.Serialize(writer, data);
stream.Seek(0, SeekOrigin.Begin);
XmlDocument doc = new XmlDocument();
doc.Load(stream);
XmlAttribute typeAttribute = doc.CreateAttribute("type");
typeAttribute.Value = TypeHelper.GetFullName(type);
doc.DocumentElement.Attributes.Append(typeAttribute);
return doc;
}
}
protected virtual T Load(XmlDocument value)
{
return (T)LoadValue(value.DocumentElement);
}
protected virtual object LoadValue(XmlNode value)
{
if (value != null)
{
string typeName = value.Attributes["type"].Value;
Type type = Type.GetType(typeName);
if (type == null)
throw new Exception(string.Format("No implementing type could be found for the type: {0}", typeName));
using (MemoryStream stream = new MemoryStream())
{
XmlDocument document = new XmlDocument();
document.AppendChild(document.ImportNode(value, true));
XmlSerializer serializer = new XmlSerializer(type);
document.Save(stream);
stream.Seek(0, SeekOrigin.Begin);
return serializer.Deserialize(stream);
}
}
return null;
}
public void NullSafeSet(IDbCommand cmd, object value, int index)
{
DbParameter parameter = (DbParameter)cmd.Parameters[index];
if (value == null)
{
parameter.Value = DBNull.Value;
return;
}
parameter.Value = Save((T)value).OuterXml;
}
public object DeepCopy(object value)
{
if (value == null) return null;
T other = (T)value;
return other.Clone();
}
public SqlType[] SqlTypes
{
get
{
return new SqlType[] { new SqlXmlType() };
}
}
public Type ReturnedType
{
get { return typeof(XmlDocument); }
}
public bool IsMutable
{
get { return true; }
}
#region IUserType Members
public object Assemble(object cached, object owner)
{
throw new Exception("The method or operation is not implemented.");
}
public object Disassemble(object value)
{
throw new Exception("The method or operation is not implemented.");
}
public int GetHashCode(object x)
{
throw new Exception("The method or operation is not implemented.");
}
public object Replace(object original, object target, object owner)
{
return original;
}
#endregion
}
The way I use this is to then subclass it.. can't remember why. I think when I originally wrote this nhibernate didnt like the generics.
public class StickersDataType : XmlClassType<StickersCollection>
{
}
