Initial support for JPA 3.2

Includes proxy support for Query#getSingleResultOrNull() and EntityManagerFactory#getName() invocations.

Closes gh-31157

spring-orm/src/main/java/org/springframework/orm/jpa/AbstractEntityManagerFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -709,6 +709,7 @@ public abstract class AbstractEntityManagerFactoryBean implements
 		}
 
 		@Override
+		@Nullable
 		public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
 			switch (method.getName()) {
 				case "equals" -> {
@@ -729,6 +730,10 @@ public abstract class AbstractEntityManagerFactoryBean implements
 						return proxy;
 					}
 				}
+				case "getName" -> {
+					// Handle JPA 3.2 getName method locally.
+					return this.entityManagerFactoryBean.getPersistenceUnitName();
+				}
 			}
 
 			try {

spring-orm/src/main/java/org/springframework/orm/jpa/SharedEntityManagerCreator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -85,6 +85,7 @@ public abstract class SharedEntityManagerCreator {
 			"execute",  // jakarta.persistence.StoredProcedureQuery.execute()
 			"executeUpdate", // jakarta.persistence.Query.executeUpdate()
 			"getSingleResult",  // jakarta.persistence.Query.getSingleResult()
+			"getSingleResultOrNull",  // jakarta.persistence.Query.getSingleResultOrNull()
 			"getResultStream",  // jakarta.persistence.Query.getResultStream()
 			"getResultList",  // jakarta.persistence.Query.getResultList()
 			"list",  // org.hibernate.query.Query.list()