Use contextual information when creating PersistentPropertyPaths.

In oder to preserve contextual information the PersistentPropertyPathFactory now obtains EntityInformation for properties from the MappingContext via their PersistentProperty representation instead of plain the TypeInformation as the former contains more information about the actual type and signatures.

Closes #2293.
Original pull request: #2294.

Author: christophstrobl

src/main/java/org/springframework/data/mapping/context/PersistentPropertyPathFactory.java

@@ -222,8 +222,7 @@ private Pair<DefaultPersistentPropertyPath<P>, E> getPair(DefaultPersistentPrope
 			return null;
 		}
 
-		TypeInformation<?> type = property.getTypeInformation().getRequiredActualType();
-		return Pair.of(path.append(property), iterator.hasNext() ? context.getRequiredPersistentEntity(type) : entity);
+		return Pair.of(path.append(property), iterator.hasNext() ? context.getRequiredPersistentEntity(property) : entity);
 	}
 
 	private <T> Collection<PersistentPropertyPath<P>> from(TypeInformation<T> type, Predicate<? super P> filter,
@@ -236,6 +235,12 @@ private <T> Collection<PersistentPropertyPath<P>> from(TypeInformation<T> type,
 		}
 
 		E entity = context.getRequiredPersistentEntity(actualType);
+		return from(entity, filter, traversalGuard, basePath);
+	}
+
+	private Collection<PersistentPropertyPath<P>> from(E entity, Predicate<? super P> filter, Predicate<P> traversalGuard,
+			DefaultPersistentPropertyPath<P> basePath) {
+
 		Set<PersistentPropertyPath<P>> properties = new HashSet<>();
 
 		PropertyHandler<P> propertyTester = persistentProperty -> {
@@ -254,7 +259,7 @@ private <T> Collection<PersistentPropertyPath<P>> from(TypeInformation<T> type,
 			}
 
 			if (traversalGuard.and(IS_ENTITY).test(persistentProperty)) {
-				properties.addAll(from(typeInformation, filter, traversalGuard, currentPath));
+				properties.addAll(from(context.getPersistentEntity(persistentProperty), filter, traversalGuard, currentPath));
 			}
 		};