Hello there,
I found a strange MappingException in my class
I load all the Users in my Database and all the "Roles" they can play. The Roles contains a Set of Rights assigned to each Role. This set should be loaded lazily.
After the User logged in I discard the information about all the other Users and want to initialize the User and the Role he choses and also the Rights this Role has in the database.
The Session that is used to all the Users and Roles before the login is closed as soon as its job is finished. After the login I open a new Session to fetch all the data that was missed during that first run.
Now the Error as described below happens right after the call to Session.merge() occurs.
I use eclipse 3.2, with hibernate imported as a "plugin from existing jars".
The HibernateUtil is in a different plugi than my login code, Eclipse-RegisterBuddy: org.hibernate
is set onall relevant plugins.
Everythings works fine with lazy="false" for the Set, but that is obviously not what I want.
I can see no obvious Error and did not find anything helpful in any of the forums, so thank you in advance for any hints.
Rüdiger
Hibernate version:
3.2.0 cr2
Mapping documents:
Code:
<hibernate-mapping>
<class name="de.fischeradt.users.types.Rolle">
<id name="id" column="Rolle_id" type="long">
<generator class="native" />
</id>
<natural-id>
<property name="name" type="string" />
</natural-id>
<set name="RolleRecht" table="RolleRecht">
<key column="rolle_id" />
<element type="de.fischeradt.users.types.RolleRechtType">
<column name="recht" />
<column name="grant" />
</element>
</set>
</class>
</hibernate-mapping>
Code:
Session session = HibernateUtil.getSession();
Transaction transaction = session.beginTransaction();
try {
Set<?> rolleRecht = nextRole.getRolleRecht();
if (!Hibernate.isInitialized(rolleRecht)) {
session.merge(rolleRecht);
Hibernate.initialize(rolleRecht);
}
} finally {
if (transaction != null) {
transaction.commit();
}
}
Full stack trace of any exception that occurs:Code:
org.hibernate.MappingException: Unknown entity: org.hibernate.collection.PersistentSet
at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:547)
at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1331)
at org.hibernate.engine.ForeignKeys.isTransient(ForeignKeys.java:180)
at org.hibernate.event.def.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:487)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:90)
at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:51)
at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:679)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:663)
at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:667)
at de.fischeradt.users.UserRepository.setCurrentUserAndRole(UserRepository.java:186)
at de.fischeradt.users.UserLoginDialog.okPressed(UserLoginDialog.java:366)
at org.eclipse.jface.dialogs.Dialog.buttonPressed(Dialog.java:500)
at org.eclipse.jface.dialogs.Dialog$3.widgetSelected(Dialog.java:652)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:90)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:925)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3346)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2966)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)
at org.eclipse.jface.window.Window.open(Window.java:796)
at de.fischeradt.connect.UserConnector.loginUser(UserConnector.java:32)
at de.fischeradt.Application.doLogin(Application.java:42)
at de.fischeradt.Application.run(Application.java:21)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:376)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:169)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
at org.eclipse.core.launcher.Main.run(Main.java:977)
at org.eclipse.core.launcher.Main.main(Main.java:952)
Name and version of the database you are using:
HSQLDB 1.8.0
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