diff --git a/tooling/metamodel-generator/src/jakartaData/java/org/hibernate/processor/test/data/eg/Library.java b/tooling/metamodel-generator/src/jakartaData/java/org/hibernate/processor/test/data/eg/Library.java
index a65168f93f..cc4ced1555 100644
--- a/tooling/metamodel-generator/src/jakartaData/java/org/hibernate/processor/test/data/eg/Library.java
+++ b/tooling/metamodel-generator/src/jakartaData/java/org/hibernate/processor/test/data/eg/Library.java
@@ -15,6 +15,10 @@ import jakarta.data.repository.Repository;
 import jakarta.data.repository.Save;
 import jakarta.data.repository.Update;
 import jakarta.transaction.Transactional;
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.NotNull;
 
 import java.time.LocalDate;
 import java.util.List;
@@ -24,20 +28,20 @@ import java.util.List;
 public interface Library {
 
 	@Find
-	Book book(String isbn);
+	Book book(@NotNull String isbn);
 
 	@Find
-	List<Book> books(@By("isbn") List<String> isbns);
+	List<Book> books(@By("isbn") @NotEmpty List<String> isbns);
 
 	@Find
-	Book book(String title, LocalDate publicationDate);
+	Book book(@NotBlank String title, @NotNull LocalDate publicationDate);
 
 	@Find
-	List<Book> publications(Type type, Sort<Book> sort);
+	List<Book> publications(@NotNull Type type, Sort<Book> sort);
 
 	@Find
 	@OrderBy("title")
-	List<Book> booksByPublisher(String publisher_name);
+	List<Book> booksByPublisher(@NotBlank String publisher_name);
 
 	@Query("where title like :titlePattern")
 	@OrderBy("title")
@@ -79,7 +83,7 @@ public interface Library {
 	void update(Author author);
 
 	@Save
-	void save(Publisher publisher);
+	void save(@Valid Publisher publisher);
 
 	@Delete
 	void delete(Publisher publisher);
@@ -94,7 +98,7 @@ public interface Library {
 	List<Author> allAuthors(Order<Author> order, Limit limit);
 
 	@Find
-	List<Author> authorsByCity(@By("address.city") String city);
+	List<Author> authorsByCity(@By("address.city") @NotBlank String city);
 
 	@Find
 	List<Author> authorsByCityAndPostcode(String address_city, String address_postcode);