[sorinc]

Hello!

I used the Create Hibernate Mapping in order to generate java classes for my MYSQL tables. When I try to get the current session from HibernateSessionFactory I receive the following error:

%%%% Error Creating SessionFactory %%%%
org.hibernate.MappingException: could not instantiate id generator
at org.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:92)
at org.hibernate.mapping.SimpleValue.createIdentifierGenerator(SimpleValue.java:151)
at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:178)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1005)
at com.forte.hibernate.HibernateSessionFactory.currentSession(HibernateSessionFactory.java:49)
at com.forte.hibernate.DepartmentsDAO.<init>(DepartmentsDAO.java:24)
at com.forte.struts.action.LoginAction.execute(LoginAction.java:50)
at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: org.hibernate.MappingException: could not interpret id generator strategy: nati
at org.hibernate.id.IdentifierGeneratorFactory.getIdentifierGeneratorClass(IdentifierGeneratorFactory.java:103)
at org.hibernate.id.IdentifierGeneratorFactory.create(IdentifierGeneratorFactory.java:86)
… 26 more
java.lang.NullPointerException

Does anyone have any idea?

Thank you very much.
Sorin

[Riyad Kalla]

You mispelled “native” for your ID generator in your mapping class, check the exception here:

Caused by: org.hibernate.MappingException: could not interpret id generator strategy: nati

Try and search your project for “nati”, see what you find.

[sorinc]

Yes, thank you very much. In one of my mapping hbm.xml files the wizard generated “nati” instead of “native” 🙂

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