hibernate DetachedCriteria的使用

hibernate DetachedCriteria的使用

public  PageModel < CrmWarning >  query(PageModel < CrmWarning >  pageModel)
             throws  Exception {
        Assert.notNull(pageModel);
        
        DetachedCriteria dc  =  DetachedCriteria.forClass(CrmWarning. class );
        
         /*
         * 添加查询条件
         * 如:dc.add(Restrictions.like("key", "%"+pageModel.getCondition("key")+"%"));
         * 
         *  */
         if  ( null   !=  pageModel.getCondition( " warnLevel " )) {
            dc.add(Restrictions.eq( " warnLevel " , pageModel.getCondition( " warnLevel " )));
        }
         if  (StringUtils.isNotBlank((String)pageModel.getCondition( " detail " ))) {
            dc.add(Restrictions.like( " detail " ,  " % " + pageModel.getCondition( " detail " ) + " % " ));
        }
         if  (StringUtils.isNotBlank((String)pageModel.getCondition( " warnDate " ))) {
             /*
             * warnDate格式是yyyy-MM-dd，这里改成查询这一天的预警
             * Restrictions.sqlRestriction()允许写原生sql的方式完成特殊需求，如下
             *  */
            dc.add(Restrictions.sqlRestriction( " to_char(time_start,'yyyy-MM-dd') = ' "   +  pageModel.getCondition( " warnDate " )  +   " ' " ));
        }
         if  ( null   !=  pageModel.getCondition( " templateId " )) {
             /*
             * 这里的templateId是模板的主键id,查询时应该转换成模板对象
             *  */
            CrmWarnTemplate warnTemplate  =   new  CrmWarnTemplate();
            warnTemplate.setTemplateId((Long)pageModel.getCondition( " templateId " ));
            dc.add(Restrictions.eq( " crmWarnTemplate " , warnTemplate));
        }
        
        dc.addOrder(Order.asc( " crmWarnTemplate " ));
        dc.addOrder(Order.desc( " timeStart " ));
        
        pageModel.setDateList(warningDao.query(dc, pageModel.getFirstNote(), pageModel.getNumInPage()));
        pageModel.setTotal(warningDao.count(dc));
        
         return  pageModel;
    }