/**
 * Service基類，所有Service均繼承該類
 *
 */
public abstract class BaseService<T> {

    /* 所有子類直接通過該SQLSession操作資料庫 */
    @Resource(name = "sqlSession")
    protected SqlSession sqlSession;

    protected Class<T> clazz;

    protected  String DOMAIN_NAME;

    /* 用於記錄日誌 */
    protected Logger logger=null
 
 ;

    @SuppressWarnings("unchecked")
    @PostConstruct
    public void postConstruct(){ 
        try {
            Type type= this.getClass().getGenericSuperclass();
            ParameterizedType parameterizedType=(ParameterizedType) type;
            clazz= (Class<T>) parameterizedType.getActualTypeArguments()[0
 
];
            DOMAIN_NAME =clazz.getName();
        } catch (Exception e) {
            e.printStackTrace();
            clazz=null;
        }
        logger = LoggerFactory.getLogger(this.getClass());
    }



    // base根據主鍵ID查詢方法
    @Transactional(readOnly = true)
    public T getByID(Long id)throws Exception {
        try
 
 {
            return sqlSession.selectOne(DOMAIN_NAME + ".selectByPrimaryKey", id);
        } catch (Exception e) {
            logger.error("根據{}獲取{}發生錯誤：{}", id, DOMAIN_NAME,e.getMessage(), e);

            throw e;
        }
    }

    // base新增方法
    @Transactional
    public void saveBase(T entity) throws Exception{
        try {
            sqlSession.insert(DOMAIN_NAME+".insertSelective",entity);
        } catch (Exception e) {
            e.printStackTrace();
            throw e;
        }
    }

    // base修改方法
    @Transactional
    public int updateBase(T entity) throws Exception{
        try{
            return sqlSession.update(DOMAIN_NAME+".updateByPrimaryKeySelective",entity);
        }catch(Exception e){
            logger.error(DOMAIN_NAME+"修改時發生錯誤：{}", e.getMessage(), e);
            throw e;
        }
    }

    // base刪除方法
    @Transactional
    public void deleteBase(Long id) throws Exception {
        try {
            sqlSession.delete(DOMAIN_NAME + ".deleteByPrimaryKey", id);
        } catch (Exception e) {
            logger.error(DOMAIN_NAME+"刪除時發生錯誤：{}", e.getMessage(), e);

            throw e;
        }
    }
}