Added a quick test for UserTypes to save an Int32 as a null to the db.

SVN: trunk@578

Author: Mike Doerfler

src/NHibernate.DomainModel/NHSpecific/ClassWithNullColumns.cs

@@ -0,0 +1,35 @@
+using System;
+
+namespace NHibernate.DomainModel.NHSpecific 
+{
+
+	/// <summary>
+	/// Summary description for ClassWithNullColumns.
+	/// </summary>
+	public class ClassWithNullColumns 
+	{
+		
+		private int _id;
+		private int _firstInt32;
+		private int _secondInt32;
+
+		public int Id
+		{
+			get { return _id; }
+			set { _id = value; }
+		}
+
+		public int FirstInt32
+		{
+			get { return _firstInt32; }
+			set { _firstInt32 = value; }
+		}
+
+		public int SecondInt32
+		{
+			get { return _secondInt32; }
+			set { _secondInt32 = value; }
+		}
+
+	}
+}

src/NHibernate.DomainModel/NHSpecific/ClassWithNullColumns.hbm.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8" ?> 
+<hibernate-mapping xmlns="urn:nhibernate-mapping-2.0">
+
+    <class 
+		name="NHibernate.DomainModel.NHSpecific.ClassWithNullColumns, NHibernate.DomainModel" 
+		table="usertype"
+	>
+		
+		<id name="Id" column="id">
+			<generator class="assigned" />
+		</id>
+		
+		<property 
+			name="FirstInt32" 
+			type="NHibernate.DomainModel.NHSpecific.NullInt32UserType, NHibernate.DomainModel" 
+			column="f_int32"
+			not-null="false"
+		/>
+		
+		<property 
+			name="SecondInt32" 
+			type="NHibernate.DomainModel.NHSpecific.NullInt32UserType, NHibernate.DomainModel" 
+			column="s_int32"
+			not-null="false"
+		/>
+		
+	</class>
+</hibernate-mapping>
+	

src/NHibernate.DomainModel/NHSpecific/NullInt32UserType.cs

@@ -0,0 +1,87 @@
+using System;
+using System.Data;
+
+using NHibernate;
+using NHibernate.SqlTypes;
+using NHibernate.Type;
+
+namespace NHibernate.DomainModel.NHSpecific 
+{
+
+	/// <summary>
+	/// Converts a value of 0 to a DbNull
+	/// </summary>
+	public class NullInt32UserType : IUserType
+	{
+		private static NullableType _int32Type = NHibernate.Int32;
+
+		public NullInt32UserType() 
+		{
+			
+		}
+
+		#region IUserType Members
+
+		public new bool Equals(object x, object y)
+		{
+			
+			if(x==y) return true;
+
+			int lhs = (x==null) ? 0 : (int)x;
+			int rhs = (y==null) ? 0 : (int)y;
+
+			return _int32Type.Equals(lhs, rhs);
+
+		}
+
+		public SqlType[] SqlTypes
+		{
+			get
+			{
+				return new SqlType[] { _int32Type.SqlType };
+			}
+		}
+
+		public System.Data.DbType[] DbTypes
+		{
+			get
+			{
+				return new DbType[] { _int32Type.SqlType.DbType };
+			}
+		}
+
+		public object DeepCopy(object value)
+		{
+			return value;
+		}
+
+		public void NullSafeSet(System.Data.IDbCommand cmd, object value, int index)
+		{
+			if(value.Equals(0)) 
+			{
+				( (IDbDataParameter)cmd.Parameters[index]).Value = DBNull.Value;
+			}
+			else 
+			{
+				_int32Type.Set(cmd, value, index);
+			}
+		}
+
+		public System.Type ReturnedType
+		{
+			get { return typeof(System.Int32); }
+		}
+
+		public object NullSafeGet(System.Data.IDataReader rs, string[] names, object owner)
+		{
+			return _int32Type.NullSafeGet(rs, names);
+		}
+
+		public bool IsMutable
+		{
+			get { return _int32Type.IsMutable; }
+		}
+
+		#endregion
+	}
+}

src/NHibernate.DomainModel/NHibernate.DomainModel-1.1.csproj

@@ -630,6 +630,15 @@
                     RelPath = "NHSpecific\ClassWithCompositeId.hbm.xml"
                     BuildAction = "EmbeddedResource"
                 />
+                <File
+                    RelPath = "NHSpecific\ClassWithNullColumns.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
+                <File
+                    RelPath = "NHSpecific\ClassWithNullColumns.hbm.xml"
+                    BuildAction = "EmbeddedResource"
+                />
                 <File
                     RelPath = "NHSpecific\CompositeId.cs"
                     SubType = "Code"
@@ -658,6 +667,11 @@
                     RelPath = "NHSpecific\Node.hbm.xml"
                     BuildAction = "EmbeddedResource"
                 />
+                <File
+                    RelPath = "NHSpecific\NullInt32UserType.cs"
+                    SubType = "Code"
+                    BuildAction = "Compile"
+                />
                 <File
                     RelPath = "NHSpecific\Parent.cs"
                     SubType = "Code"