falta borrar y busqueda por columnas

src/main/java/com/imprimelibros/erp/users/RoleDaoImpl.java

@@ -2,6 +2,9 @@ package com.imprimelibros.erp.users;
 
 import jakarta.persistence.EntityManager;
 import jakarta.persistence.TypedQuery;
+
+import java.util.Optional;
+
 import org.springframework.stereotype.Repository;
 
 @Repository
@@ -14,7 +17,7 @@ public class RoleDaoImpl implements RoleDao {
 	}
 
 	@Override
-	public Role findRoleByName(String theRoleName) {
+	public Optional<Role> findRoleByName(String theRoleName) {
 
 		// retrieve/read from database using name
 		TypedQuery<Role> theQuery = entityManager.createQuery("from Role where name=:roleName", Role.class);
@@ -27,7 +30,6 @@ public class RoleDaoImpl implements RoleDao {
 		} catch (Exception e) {
 			theRole = null;
 		}
-		
-		return theRole;
+		return Optional.ofNullable(theRole);
 	}
 }