jdo - 如何编写 JDO 查询以使用一个字符串参数检查多个对象属性？

Question

我的 Owner 类有 6 个字符串属性。我想编写一个 JDO 查询，它应该检查一个带有 Owner 类的所有 6 个属性的字符串，如果这 6 个属性中的任何一个匹配，那么应该将该所有者对象添加到列表中。我正在使用以下 JDO 查询语法，但它不起作用：

 String branchName = req.getParameter("branch");
 List<Owner> owners = null;
 Query query = pm.newQuery(Owner.class);
 query.setFilter("branch1 == branchParam || branch2 == branchParam || branch3 == branchParam || branch4 == branchParam || branch5 == branchParam || branch6 == branchParam");
 query.declareParameters("String branchParam");
 companies = (List<Owner>) query.execute(branchName); 

我得到以下异常：

 org.datanucleus.store.appengine.query.DatastoreQuery$UnsupportedDatastoreFeatureException: Problem with query <SELECT FROM com.eplinovo.stallbokenapp.domain.HastForetag WHERE branch1 == branchParam || branch2 == branchParam || branch3 == branchParam || branch4 == branchParam || branch5 == branchParam || branch6 == branchParam PARAMETERS String branchParam>: Or filters cannot be applied to multiple properties (found both branch1 and branch2).

知道如何为此编写查询。提前致谢。