NH-2997 - Add method Where to IManyToManyMapper

Author: hazzik

src/NHibernate/Mapping/ByCode/IManyToManyMapper.cs

@@ -8,5 +8,6 @@ public interface IManyToManyMapper : IColumnsMapper
 		void Formula(string formula);
 		void Lazy(LazyRelation lazyRelation);
 		void ForeignKey(string foreignKeyName);
+		void Where(string sqlWhereClause);
 	}
 }

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

@@ -65,6 +65,11 @@ public void ForeignKey(string foreignKeyName)
 			customizersHolder.AddCustomizer(propertyPath, (IManyToManyMapper x) => x.ForeignKey(foreignKeyName));
 		}
 
+		public void Where(string sqlWhereClause)
+		{
+			customizersHolder.AddCustomizer(propertyPath, (IManyToManyMapper x) => x.Where(sqlWhereClause));
+		}
+
 		#endregion
 	}
 }

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

@@ -166,6 +166,11 @@ public void ForeignKey(string foreignKeyName)
 			manyToMany.foreignkey = foreignKeyName;
 		}
 
+		public void Where(string sqlWhereClause)
+		{
+			manyToMany.where = sqlWhereClause;
+		}
+
 		#endregion
 	}
 }