Added ability to map check attribute on class mapping by code

Author: whut

src/NHibernate/Mapping/ByCode/IClassMapper.cs

@@ -15,6 +15,7 @@ public interface IClassAttributesMapper : IEntityAttributesMapper, IEntitySqlsMa
 		void Discriminator(Action<IDiscriminatorMapper> discriminatorMapping);
 		void DiscriminatorValue(object value);
 		void Table(string tableName);
+		void Check(string check);
 		void Catalog(string catalogName);
 		void Schema(string schemaName);
 		void Mutable(bool isMutable);

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

@@ -166,6 +166,11 @@ public void Table(string tableName)
 			classMapping.table = tableName;
 		}
 
+		public void Check(string check)
+		{
+			classMapping.check = check;
+		}
+
 		public void Catalog(string catalogName)
 		{
 			classMapping.catalog = catalogName;

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

@@ -101,6 +101,11 @@ public void Table(string tableName)
 			CustomizersHolder.AddCustomizer(typeof(TEntity), (IClassMapper m) => m.Table(tableName));
 		}
 
+		public void Check(string tableName)
+		{
+			CustomizersHolder.AddCustomizer(typeof(TEntity), (IClassMapper m) => m.Check(tableName));
+		}
+
 		public void Catalog(string catalogName)
 		{
 			CustomizersHolder.AddCustomizer(typeof(TEntity), (IClassMapper m) => m.Catalog(catalogName));