Fix query dynamic component on unmapped interface

src/NHibernate.Test/Async/NHSpecificTest/NH2664Generic/Fixture.cs

@@ -96,6 +96,22 @@ select p
 				Assert.That(product.Properties["Name"], Is.EqualTo("First Product"));
 			}
 		}
+
+		[Test(Description = "GH-3150")]
+		public async Task Query_DynamicComponentByInterfaceAsync()
+		{
+			using (var session = OpenSession())
+			{
+				var product = await ((
+					from p in session.Query<IProduct>()
+					where (string) p.Properties["Name"] == "First Product"
+					select p
+				).SingleAsync());
+
+				Assert.That(product, Is.Not.Null);
+				Assert.That(product.Properties["Name"], Is.EqualTo("First Product"));
+			}
+		}
 
 		[Test]
 		public async Task Multiple_Query_Does_Not_CacheAsync()
@@ -121,4 +137,4 @@ select p
 			}
 		}
 	}
-}
+}

src/NHibernate.Test/Async/NHSpecificTest/NH3571Generic/Fixture.cs

@@ -77,6 +77,22 @@ from p in session.Query<Product>()
 					select p
 				).SingleAsync());
 
+				Assert.That(product, Is.Not.Null);
+				Assert.That(product.Details.Properties["Name"], Is.EqualTo("First Product"));
+			}
+		}	
+
+		[Test(Description = "GH-3150")]
+		public async Task CanQueryDynamicComponentInComponentByInterfaceAsync()
+		{
+			using (var session = OpenSession())
+			{
+				var product = await ((
+					from p in session.Query<IProduct>()
+					where (string) p.Details.Properties["Name"] == "First Product"
+					select p
+				).SingleAsync());
+
 				Assert.That(product, Is.Not.Null);
 				Assert.That(product.Details.Properties["Name"], Is.EqualTo("First Product"));
 			}
@@ -106,4 +122,4 @@ select p
 			}
 		}
 	}
-}
+}

src/NHibernate.Test/NHSpecificTest/NH2664Generic/Fixture.cs

@@ -85,6 +85,22 @@ select p
 				Assert.That(product.Properties["Name"], Is.EqualTo("First Product"));
 			}
 		}
+
+		[Test(Description = "GH-3150")]
+		public void Query_DynamicComponentByInterface()
+		{
+			using (var session = OpenSession())
+			{
+				var product = (
+					from p in session.Query<IProduct>()
+					where (string) p.Properties["Name"] == "First Product"
+					select p
+				).Single();
+
+				Assert.That(product, Is.Not.Null);
+				Assert.That(product.Properties["Name"], Is.EqualTo("First Product"));
+			}
+		}
 
 		[Test]
 		public void Multiple_Query_Does_Not_Cache()
@@ -131,4 +147,4 @@ from a in session.Query<Product>()
 			}
 		}
 	}
-}
+}

src/NHibernate.Test/NHSpecificTest/NH2664Generic/IProduct.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+
+namespace NHibernate.Test.NHSpecificTest.NH2664Generic
+{
+	public interface IProduct
+	{
+		string ProductId { get; set; }
+		IDictionary<string, object> Properties { get; set; }
+	}
+}

src/NHibernate.Test/NHSpecificTest/NH2664Generic/Product.cs

@@ -3,7 +3,7 @@
 
 namespace NHibernate.Test.NHSpecificTest.NH2664Generic
 {
-	public class Product
+	public class Product : IProduct
 	{
 		public virtual string ProductId { get; set; }
 
@@ -21,4 +21,4 @@ public virtual IDictionary<string, object> Properties
 			set { _properties = value; }
 		}
 	}
-}
+}

src/NHibernate.Test/NHSpecificTest/NH3571Generic/Fixture.cs

@@ -66,6 +66,22 @@ from p in session.Query<Product>()
 					select p
 				).Single();
 
+				Assert.That(product, Is.Not.Null);
+				Assert.That(product.Details.Properties["Name"], Is.EqualTo("First Product"));
+			}
+		}	
+
+		[Test(Description = "GH-3150")]
+		public void CanQueryDynamicComponentInComponentByInterface()
+		{
+			using (var session = OpenSession())
+			{
+				var product = (
+					from p in session.Query<IProduct>()
+					where (string) p.Details.Properties["Name"] == "First Product"
+					select p
+				).Single();
+
 				Assert.That(product, Is.Not.Null);
 				Assert.That(product.Details.Properties["Name"], Is.EqualTo("First Product"));
 			}
@@ -119,4 +135,4 @@ from a in session.Query<Product>()
 			}
 		}
 	}
-}
+}

src/NHibernate.Test/NHSpecificTest/NH3571Generic/IProduct.cs

@@ -0,0 +1,11 @@
+using System.Collections.Generic;
+
+namespace NHibernate.Test.NHSpecificTest.NH3571Generic
+{
+	public interface IProduct
+	{
+		ProductDetails Details { get; set; }
+		IList<ProductDetails> DetailsList { get; set; }
+		string ProductId { get; set; }
+	}
+}

src/NHibernate.Test/NHSpecificTest/NH3571Generic/Product.cs

@@ -3,7 +3,7 @@
 
 namespace NHibernate.Test.NHSpecificTest.NH3571Generic
 {
-	public class Product
+	public class Product : IProduct
 	{
 		public Product()
 		{
@@ -40,4 +40,4 @@ public virtual IDictionary<string, object> Properties
 			set { _properties = value; }
 		}
 	}
-}
+}

src/NHibernate/Linq/Visitors/ExpressionParameterVisitor.cs

@@ -110,7 +110,7 @@ protected override Expression VisitMethodCall(MethodCallExpression expression)
 				_collectionParameters.Add(collectionParameter);
 			}
 
-			if (VisitorUtil.IsDynamicComponentDictionaryGetter(expression, _sessionFactory))
+			if (VisitorUtil.TryGetPotentialDynamicComponentDictionaryMember(expression, out _))
 			{
 				return expression;
 			}

src/NHibernate/Linq/Visitors/VisitorUtil.cs

@@ -4,64 +4,31 @@
 using System.Collections;
 using System.Reflection;
 using NHibernate.Util;
-using Remotion.Linq.Clauses.Expressions;
 using Remotion.Linq.Parsing.ExpressionVisitors;
+using NHibernate.Engine;
+using System;
 
 namespace NHibernate.Linq.Visitors
 {
 	public static class VisitorUtil
 	{
 		public static bool IsDynamicComponentDictionaryGetter(MethodInfo method, Expression targetObject, IEnumerable<Expression> arguments, ISessionFactory sessionFactory, out string memberName)
 		{
-			if (!TryGetPotentialDynamicComponentDictionaryMember(method, targetObject, arguments, out memberName))
-			{
-				return false;
-			}
-
-			var member = (MemberExpression) targetObject;
-			var memberPath = member.Member.Name;
-			var metaData = sessionFactory.GetClassMetadata(member.Expression.Type);
-
-			//Walk backwards if the owning member is not a mapped class (i.e a possible Component)
-			targetObject = member.Expression;
-			while (metaData == null && targetObject != null &&
-			       (targetObject.NodeType == ExpressionType.MemberAccess || targetObject.NodeType == ExpressionType.Parameter ||
-			        targetObject is QuerySourceReferenceExpression))
-			{
-				System.Type memberType;
-				if (targetObject is QuerySourceReferenceExpression)
-				{
-					var querySourceExpression = (QuerySourceReferenceExpression) targetObject;
-					memberType = querySourceExpression.Type;
-				}
-				else if (targetObject.NodeType == ExpressionType.Parameter)
-				{
-					var parameterExpression = (ParameterExpression) targetObject;
-					memberType = parameterExpression.Type;
-				}
-				else //targetObject.NodeType == ExpressionType.MemberAccess
-				{
-					var memberExpression = ((MemberExpression) targetObject);
-					memberPath = memberExpression.Member.Name + "." + memberPath;
-					memberType = memberExpression.Type;
-					targetObject = memberExpression.Expression;
-				}
-				metaData = sessionFactory.GetClassMetadata(memberType);
-			}
-
-			if (metaData == null)
-				return false;
-
-			// IDictionary can be mapped as collection or component - is it mapped as a component?
-			var propertyType = metaData.GetPropertyType(memberPath);
-			return (propertyType != null && propertyType.IsComponentType);
+			return TryGetPotentialDynamicComponentDictionaryMember(method, targetObject, arguments, out memberName)
+				&& ExpressionsHelper.TryGetMappedType((ISessionFactoryImplementor) sessionFactory, targetObject, out var mappedType, out _, out _, out _)
+				// IDictionary can be mapped as collection or component - is it mapped as a component?
+				&& mappedType.IsComponentType;
 		}
 
+		// Since 5.4
+		[Obsolete("This method has no more usages and will be removed in a future version")]
 		public static bool IsDynamicComponentDictionaryGetter(MethodCallExpression expression, ISessionFactory sessionFactory, out string memberName)
 		{
 			return IsDynamicComponentDictionaryGetter(expression.Method, expression.Object, expression.Arguments, sessionFactory, out memberName);
 		}
 
+		// Since 5.4
+		[Obsolete("This method has no more usages and will be removed in a future version")]
 		public static bool IsDynamicComponentDictionaryGetter(MethodCallExpression expression, ISessionFactory sessionFactory)
 		{
 			string memberName;