Added support for union-sublass and unit tests

Author: rjperes

src/NHibernate.Test/MappingByCode/ExplicitMappingTests/BasicMappingOfSimpleClass.cs

@@ -19,6 +19,7 @@ public class MyClass
 		[Test]
 		public void AbstractClass()
 		{
+			//NH-3527
 			var mapper = new ModelMapper();
 			mapper.Class<MyClass>(ca =>
 			{

src/NHibernate.Test/MappingByCode/ExplicitlyDeclaredModelTests/UnionSubclassMappingStrategyTests.cs

@@ -79,5 +79,23 @@ public void WhenRegisteredAsUnionSubclassThenIsEntity()
 
 			Assert.That(inspector.IsEntity(typeof(Inherited1)), Is.True);
 		}
+
+		[Test]
+		public void SubclassIsAbstract()
+		{
+			//NH-3527
+			var modelMapper = new ModelMapper();
+			modelMapper.Class<MyClass>(c => { });
+			modelMapper.UnionSubclass<Inherited1>(c =>
+				{
+					c.Abstract(true);
+					c.Extends(typeof(MyClass));
+				});
+
+			var mappings = modelMapper.CompileMappingForAllExplicitlyAddedEntities();
+
+			Assert.IsTrue(mappings.UnionSubclasses[0].@abstract);
+			Assert.IsTrue(mappings.UnionSubclasses[0].extends == typeof(MyClass).FullName);
+		}
 	}
 }

src/NHibernate/Mapping/ByCode/IUnionSubclassMapper.cs

@@ -6,6 +6,7 @@ public interface IUnionSubclassAttributesMapper : IEntityAttributesMapper, IEnti
 		void Catalog(string catalogName);
 		void Schema(string schemaName);
 		void Extends(System.Type baseType);
+		void Abstract(bool isAbstract);
 	}
 
 	public interface IUnionSubclassMapper : IUnionSubclassAttributesMapper, IPropertyContainerMapper {}
@@ -15,6 +16,8 @@ public interface IUnionSubclassAttributesMapper<TEntity> : IEntityAttributesMapp
 		void Table(string tableName);
 		void Catalog(string catalogName);
 		void Schema(string schemaName);
+		void Extends(System.Type baseType);
+		void Abstract(bool isAbstract);
 	}
 
 	public interface IUnionSubclassMapper<TEntity> : IUnionSubclassAttributesMapper<TEntity>, IPropertyContainerMapper<TEntity> where TEntity : class {}

src/NHibernate/Mapping/ByCode/Impl/CustomizersImpl/UnionSubclassCustomizer.cs

@@ -97,6 +97,15 @@ public void Subselect(string sql)
 		#endregion
 
 		#region Implementation of IUnionSubclassAttributesMapper<TEntity>
+		public void Extends(System.Type baseType)
+		{
+			CustomizersHolder.AddCustomizer(typeof(TEntity), (IUnionSubclassAttributesMapper m) => m.Extends(baseType));
+		}
+
+		public void Abstract(bool isAbstract)
+		{
+			CustomizersHolder.AddCustomizer(typeof(TEntity), (IUnionSubclassAttributesMapper m) => m.Abstract(isAbstract));
+		}
 
 		public void Table(string tableName)
 		{

src/NHibernate/Mapping/ByCode/Impl/UnionSubclassMapper.cs

@@ -150,6 +150,11 @@ public void Subselect(string sql)
 		#endregion
 
 		#region Implementation of IUnionSubclassAttributesMapper
+		public void Abstract(bool isAbstract)
+		{
+			classMapping.@abstract = isAbstract;
+			classMapping.abstractSpecified = true;
+		}
 
 		public void Table(string tableName)
 		{