0

私は2つのクラスを持っています

GenericDaoWithObjectId.class

public abstract class GenericDaoWithObjectId<T extends IEntity, Z extends Serializable> extends GenericDao<T> {
    public Map<Object, T> findByIdsAsMap(List<Object> ids, boolean addNonDeletedConstraint) throws DaoException {
        String query = addNonDeletedConstraint ? QUERY_FIND_NON_DELETED_BY_IDS : QUERY_FIND_BY_IDS;
        query = query.replaceAll("\\{type\\}", type);
        Query q = getSession().createQuery(query);
        q.setParameterList("ids", ids);
        List<T> entities = (List<T>) q.list();
        if (entities.size() != ids.size()) {
            throw new DaoException(DaoErrorCodes.OBJECT_NOT_FOUND);
        }
        Map<Object, T> result = new HashMap<Object, T>(); // I would've done that in query (using SELECT new map(u.id, u), but hibernate has a bug...
        // (https://hibernate.onjira.com/browse/HHH-3345)
        for (T e : entities) {
            result.put(e.getId(), e);
        }
        return result;
    }
}

GenericDao.class

public abstract class GenericDao<T extends IEntity> {
    public Map<Long, T> findByIdsAsMap(List<Long> ids, boolean addNonDeletedConstraint) throws DaoException {
        String query = addNonDeletedConstraint ? QUERY_FIND_NON_DELETED_BY_IDS : QUERY_FIND_BY_IDS;
        query = query.replaceAll("\\{type\\}", type);
        Query q = getSession().createQuery(query);
        q.setParameterList("ids", ids);
        List<T> entities = (List<T>) q.list();
        if (entities.size() != ids.size()) {
            throw new DaoException(DaoErrorCodes.OBJECT_NOT_FOUND);
        }
        Map<Long, T> result = new HashMap<Long, T>(); // I would've done that in query (using SELECT new map(u.id, u), but hibernate has a bug...
                                                      // (https://hibernate.onjira.com/browse/HHH-3345)
        for (T e : entities) {
            result.put((Long) e.getId(), e);
        }
        return result;
    }
}

そして、GenericDaoWIthObjectId のメソッドで GenericDao のメソッドをオーバーライド (または単に作成) したいと考えています。問題が発生するのは、JVM を読んでいるときに、それとList<Long>リスト<Object>とおそらく同じMap<Long,T>であると「考える」ためMap<Object,T>です。どうすればそれを機能させることができますか?

4

1 に答える 1