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karllogan
 Post subject: eclipse rcp + hibernate
PostPosted: Thu Mar 23, 2006 7:53 am 
Newbie

Joined: Thu Mar 23, 2006 7:27 am
Posts: 2
Hi,

i'm trying to use a working hibernate configuration under a simple eclipse rcp application. While it loads the configuration and mapping files and tries to create the sessionfactory, it throws a mapping exception for java.lang.String with message "persistent class not know".

Any idea?

Thanks in advance.
KL


Hibernate:3.1.2

Eclipse: 3.2.0, I20060223-1656

Stack trace:
Code:
org.hibernate.MappingException: persistent class not known: java.lang.String
   at org.hibernate.cfg.Configuration$1.getIdentifierType(Configuration.java:1917)
   at org.hibernate.type.EntityType.getIdentifierType(EntityType.java:226)
   at org.hibernate.type.EntityType.getIdentifierOrUniqueKeyType(EntityType.java:236)
   at org.hibernate.type.SpecialOneToOneType.getColumnSpan(SpecialOneToOneType.java:45)
   at org.hibernate.mapping.SimpleValue.isValid(SimpleValue.java:253)
   at org.hibernate.mapping.ToOne.isValid(ToOne.java:82)
   at org.hibernate.mapping.Property.isValid(Property.java:185)
   at org.hibernate.mapping.PersistentClass.validate(PersistentClass.java:395)
   at org.hibernate.mapping.SingleTableSubclass.validate(SingleTableSubclass.java:43)
   at org.hibernate.cfg.Configuration.validate(Configuration.java:984)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1169)
   at foo.editor.utils.HibernateUtil.<clinit>(HibernateUtil.java:21)
   at java.lang.Class.forName0(Native Method)
   at java.lang.Class.forName(Unknown Source)
   at foo_editor.Activator.start(Activator.java:26)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl$2.run(BundleContextImpl.java:994)
   at java.security.AccessController.doPrivileged(Native Method)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.startActivator(BundleContextImpl.java:988)
   at org.eclipse.osgi.framework.internal.core.BundleContextImpl.start(BundleContextImpl.java:969)
   at org.eclipse.osgi.framework.internal.core.BundleHost.startWorker(BundleHost.java:314)
   at org.eclipse.osgi.framework.internal.core.AbstractBundle.start(AbstractBundle.java:256)
   at org.eclipse.core.runtime.internal.adaptor.EclipseLazyStarter.preFindLocalClass(EclipseLazyStarter.java:83)
   at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:402)
   at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:186)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:338)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:390)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:351)
   at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:81)
   at java.lang.ClassLoader.loadClass(Unknown Source)
   at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:276)
   at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
   at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1245)
   at org.eclipse.core.internal.registry.osgi.RegistryStrategyOSGI.createExecutableExtension(RegistryStrategyOSGI.java:138)
   at org.eclipse.core.internal.registry.ExtensionRegistry.createExecutableExtension(ExtensionRegistry.java:759)
   at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:243)
   at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:51)
   at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:95)
   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:374)
   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:338)
   at org.eclipse.core.launcher.Main.basicRun(Main.java:282)
   at org.eclipse.core.launcher.Main.run(Main.java:977)
   at org.eclipse.core.launcher.Main.main(Main.java:952)


database: MySQL 5.0.16
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TheXFed
 Post subject:
PostPosted: Thu Mar 23, 2006 9:05 am 
Beginner
Beginner

Joined: Thu Nov 11, 2004 12:18 pm
Posts: 37
Location: Baltimore, MD
This isn't an RCP related problem, but rather a mapping issue. I can't tell exactly what's wrong, but it looks like you need to take a look at any one-to-one mappings that you have. Make sure that the associated class in these mappings are set correctly in the .hbm.xml files.

_________________
-Chris

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karllogan
 Post subject:
PostPosted: Thu Mar 23, 2006 9:36 am 
Newbie

Joined: Thu Mar 23, 2006 7:27 am
Posts: 2
When i'm doing the same thing from not the RCP plug-in, but from a simple class it's works fine...
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TheXFed
 Post subject:
PostPosted: Thu Mar 23, 2006 12:04 pm 
Beginner
Beginner

Joined: Thu Nov 11, 2004 12:18 pm
Posts: 37
Location: Baltimore, MD
Hibernate doesn't perform any differently from within RCP, Swing, or no UI. I've used hibernate on a few different RCP Applications, and never had any issues different from what our unit tests would show.

The only thing I can think that could be different is the classpath. I know RCP has some funky classpath usage, but I'm not sure if that would explain why you get an error about java.lang.String.

Also, make sure your RCP has the most up-to-date code/mappings.

_________________
-Chris

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mdean77
 Post subject: Buddy System
PostPosted: Fri Mar 24, 2006 9:52 am 
Beginner
Beginner

Joined: Fri Mar 04, 2005 7:12 pm
Posts: 34
You need to use buddy registration. The Hibernate classes do not know about your RCP classes in advance. See:

http://www.hibernate.org/311.html

_________________
J. Michael Dean, MD

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