Hi,

I have two tables(parent & child) link with one-to-many association. In my case, i want to retrieve parent info directly when i get child. Can hibernate do this?

Yes, but you have to read the docs and some tutorials.

has any relate example or tutorial for reference? please i really need these...

http://www.hibernate.org/5.html

I confuse when i try to retrieve parent from child using hibernate. In my case, i using RCP to do interface design and session bean do business logic processing (like save data, retrieve date ...). I got a EJBInvoker as middleman between my user interface and session bean.

If retrieve a parent, anything run properly and i also got the child info automatically. Now i try to retrieve a child from database. Below source code write in a session bean for retrieve a child from database. I using system.out.println to do tracing and system able to display child info and parent info. That mean i already retrieve parent and child from database successfully.

But if found that if i commented System.out.println, i got error and anything display on my interface. If i uncommented it , anything run properly. What actually got wrong? How to solve it? Please help me!!!

Session ses = null;
try{
boolean trace = logger.isTraceEnabled();

ses = ThreadLocalSession.currentSession();
Query query = ses.createQuery(“select c from Child as c”);
List list = query.list();
Iterator ite = list.iterator();
while(ite.hasNext()){
Child c = (Child)ite.next();
//System.out.println(+c.getParent().getName());
}
ses.flush();

return list;
} catch (HibernateException e) {
ctx.setRollbackOnly();
throw new ServiceException("Unable to search sale contract ", e);
}finally{

try {
ThreadLocalSession.closeSession();
} catch (HibernateException e1) {
e1.printStackTrace();
}
}


Error message i got :

java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at my.com.shinyang.ejb.EJBInvoker.invokeRemoteEJB(EJBInvoker.java:79)
at my.com.shinyang.eply.ui.views.ShipmentCatelogTableView.saveSchedule(ShipmentCatelogTableView.java:576)
at my.com.shinyang.eply.ui.views.ShipmentCatelogView.populateScheduleView(ShipmentCatelogView.java:124)
at my.com.shinyang.eply.ui.views.ShipmentCatelogView.access$1(ShipmentCatelogView.java:114)
at my.com.shinyang.eply.ui.views.ShipmentCatelogView$1.run(ShipmentCatelogView.java:48)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:881)
at org.eclipse.ui.actions.RetargetAction.runWithEvent(RetargetAction.java:212)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:915)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:866)
at org.eclipse.jface.action.ActionContributionItem$8.handleEvent(ActionContributionItem.java:824)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:796)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2772)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2431)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1377)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1348)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:254)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:141)
at my.com.shinyang.ui.MainWindow.run(MainWindow.java:28)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:335)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:273)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:129)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.eclipse.core.launcher.Main.basicRun(Main.java:183)
at org.eclipse.core.launcher.Main.run(Main.java:644)
at org.eclipse.core.launcher.Main.main(Main.java:628)

Caused by: java.lang.NoClassDefFoundError: net/sf/cglib/proxy/MethodInterceptor
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:537)
at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:298)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.defineClass(EclipseClassLoader.java:223)
at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.findClassImpl(DefaultClassLoader.java:281)
at org.eclipse.osgi.framework.internal.defaultadaptor.DefaultClassLoader.findClass(DefaultClassLoader.java:172)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.findLocalClass(AbstractClassLoader.java:220)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.basicFindLocalClass(EclipseClassLoader.java:135)
at org.eclipse.core.runtime.adaptor.EclipseClassLoader.findLocalClass(EclipseClassLoader.java:59)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:371)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:402)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass(AbstractClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
at net.sf.hibernate.proxy.SerializableProxy.readResolve(SerializableProxy.java:45)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:925)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1655)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1845)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1769)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at java.util.ArrayList.readObject(ArrayList.java:547)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:838)
at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1746)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1646)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1274)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:324)
at java.rmi.MarshalledObject.get(MarshalledObject.java:135)
at org.jboss.invocation.jrmp.interfaces.JRMPInvokerProxy.invoke(JRMPInvokerProxy.java:136)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:96)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:46)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:45)
at org.jboss.proxy.ejb.StatelessSessionInterceptor.invoke(StatelessSessionInterceptor.java:100)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:85)
at $Proxy5.getScheduleByQuery(Unknown Source)
... 33 more

Hibernate requires 'cglib', which was not available to your program when you ran it. The docs will show you which libraries you need in order to run Hibernate: http://www.hibernate.org/hib_docs/refer ... dpartylibs