HHH-19017: Reproduce Class Cast Exception for PersistentAttributeInterceptable

hibernate-core/src/test/java/org/hibernate/orm/test/lazyonetoone/LazyOneToOneWithEntityGraphTest.java

@@ -0,0 +1,89 @@
+package org.hibernate.orm.test.lazyonetoone;
+
+import java.util.List;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.NamedAttributeNode;
+import jakarta.persistence.NamedEntityGraph;
+import jakarta.persistence.OneToMany;
+import jakarta.persistence.OneToOne;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.Test;
+
+@DomainModel(
+    annotatedClasses = {
+        LazyOneToOneWithEntityGraphTest.Company.class,
+        LazyOneToOneWithEntityGraphTest.Employee.class,
+        LazyOneToOneWithEntityGraphTest.Project.class
+    }
+)
+@SessionFactory
+public class LazyOneToOneWithEntityGraphTest {
+  @Test
+  void reproducerTest(SessionFactoryScope scope) {
+    scope.inTransaction(session -> {
+      // Create company
+      Company company = new Company();
+      company.id = 1L;
+      company.name = "Hibernate";
+      session.persist(company);
+
+      // Create project
+      Project project = new Project();
+      project.id = 1L;
+      session.persist(project);
+
+      // Create employee
+      Employee employee = new Employee();
+      employee.id = 1L;
+      employee.company = company;
+      employee.projects = List.of(project);
+      session.persist(employee);
+    });
+
+    scope.inTransaction(session -> {
+      // Load employee using entity graph
+      Employee employee = session.createQuery(
+              "select e from Employee e where e.id = :id", Employee.class)
+          .setParameter("id", 1L)
+          .setHint("javax.persistence.fetchgraph", session.getEntityGraph("employee.projects"))
+          .getSingleResult();
+    });
+  }
+
+  @Entity(name = "Company")
+  public static class Company {
+    @Id
+    private Long id;
+
+    private String name;
+  }
+
+  @Entity(name = "Employee")
+  @NamedEntityGraph(
+      name = "employee.projects",
+      attributeNodes = @NamedAttributeNode("projects")
+  )
+  public static class Employee {
+    @Id
+    private Long id;
+
+    @OneToOne
+    @JoinColumn(name = "company_name", referencedColumnName = "name")
+    private Company company;
+
+    @OneToMany(fetch = FetchType.LAZY)
+    private List<Project> projects;
+  }
+
+  @Entity(name = "Project")
+  public static class Project {
+    @Id
+    private Long id;
+  }
+}