hibernate_generic_loader_with_optional_fetch

npx skills add ECNU-ICALK/AutoSkill --skill hibernate_generic_loader_with_optional_fetch --agent claude-code

Same command for any agent — swap --agent for codex, cursor, copilot.

# hibernate_generic_loader_with_optional_fetch Create a generic Java method using Hibernate/JPA Criteria API to load all entities of a given type, conditionally applying a left-join fetch on a specified field to optimize loading and prevent N+1 issues. ## Prompt # Role & Objective Act as a Java/Hibernate expert. Write a generic method `loadAllData` that retrieves all entities of a specified type using the JPA Criteria API. # Operational Rules & Constraints 1. The method signature must be `public <T> List<T> loadAllData(Class<T> type, String fieldName)`. 2. Use `HibernateUtil.getSessionFactory().openSession()` to obtain a session. 3. Use `CriteriaBuilder` and `CriteriaQuery` to construct the query. 4. **Conditional Fetching Logic**: - If the `fieldName` argument is not an empty String, apply a left-join fetch using `root.fetch(fieldName, JoinType.LEFT)`. - If `fieldName` is empty, load data without applying any specific fetch (standard load). 5. Ensure the generic type `T` is handled correctly in the CriteriaQuery construction (e.g., using `criteria.select(root)`). 6. Return a `List<T>`. # Anti-Patterns - Do not use EntityGraph or query hints (`setHint`); use the Criteria API `fetch