From b189240aaf83bf438981384645bf92bfb185ee98 Mon Sep 17 00:00:00 2001
From: Mark Paluch <mpaluch@vmware.com>
Date: Mon, 29 Nov 2021 11:47:14 +0100
Subject: [PATCH] Polishing.

Original Pull Request: #2420
---
 .../context/EntityProjectionIntrospector.java    | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/main/java/org/springframework/data/mapping/context/EntityProjectionIntrospector.java b/src/main/java/org/springframework/data/mapping/context/EntityProjectionIntrospector.java
index e3d759718..bc2991a83 100644
--- a/src/main/java/org/springframework/data/mapping/context/EntityProjectionIntrospector.java
+++ b/src/main/java/org/springframework/data/mapping/context/EntityProjectionIntrospector.java
@@ -102,7 +102,6 @@ public class EntityProjectionIntrospector {
 					false);
 		}
 
-
 		PersistentEntity<?, ?> persistentEntity = mappingContext.getRequiredPersistentEntity(domainType);
 		List<PropertyProjection<?, ?>> propertyDescriptors = getProperties(null, projectionInformation,
 				returnedTypeInformation,
@@ -111,12 +110,13 @@ public class EntityProjectionIntrospector {
 		return EntityProjection.projecting(returnedTypeInformation, domainTypeInformation, propertyDescriptors, true);
 	}
 
-
 	private List<PropertyProjection<?, ?>> getProperties(@Nullable PropertyPath propertyPath,
 			ProjectionInformation projectionInformation, TypeInformation<?> projectionTypeInformation,
 			PersistentEntity<?, ?> persistentEntity, @Nullable CycleGuard cycleGuard) {
 
 		List<PropertyProjection<?, ?>> propertyDescriptors = new ArrayList<>();
+
+		// TODO: PropertyDescriptor only created for DTO's with getters/setters
 		for (PropertyDescriptor inputProperty : projectionInformation.getInputProperties()) {
 
 			PersistentProperty<?> persistentProperty = persistentEntity.getPersistentProperty(inputProperty.getName());
@@ -228,6 +228,18 @@ public class EntityProjectionIntrospector {
 			return new EntityProjection<>(mappedType, domainType, properties, false, false);
 		}
 
+		/**
+		 * Create a non-projecting variant of a mapped type.
+		 *
+		 * @param mappedType
+		 * @param domainType
+		 * @return
+		 */
+		public static <T> EntityProjection<T, T> nonProjecting(Class<T> type) {
+			ClassTypeInformation<T> typeInformation = ClassTypeInformation.from(type);
+			return new EntityProjection<>(typeInformation, typeInformation, Collections.emptyList(), false, false);
+		}
+
 		/**
 		 * @return the mapped type used by this type view.
 		 */