I am using JPA in addition to spring(3.0.0.M4). While deleting multiple records using query.executeUpdate() i am getting the following exception. org.springframework.web.util.NestedServletException: ...

I m利用JPA开展一个项目,在大多数情况下,都希望获得实体,但有一些案例(报告是其中之一,但还有其他一些)我不想或需要获得实体,但......

I m playing around a bit with JPA(Eclipselink to be specific). The below entity have a timestamp that s supposed to reflect whenever that entity was last updated. What are the strategies for making ...

I m trying to add a composite primary key to a class and having a bit of trouble. Here are the classes. class User { private long id; ... } class Token { private User user; private ...

I would like to order a query by a function which uses properties of the class. Something like: @entity class A { private int id; private String name; public int StringLength() { return name.length()...

Hello good people i came accross a weird behaviour in my test.I m using JPA hibernate annotation with spring. let say i have an Class MyObject and it s property email is marqued @Column(name="EMAIL", ...

I have an object "Instance" with another object "Course" inside. When trying to persist a new Instance object, I get the following error if Course is null: java.lang.IllegalStateException: During ...

Methods invoked: 1. Struts Action 2. Service class method (annotated by @Transactional) 3. Xfire webservice call Everything including struts (DelegatingActionProxy) and transactions is configured ...