Problem reading from Repository useing ocm

[Kurz Wolfgang]

Hello everyone,

I have a problem readign my content from the repository useing ocm.

This is what I do:

I create a entry like this:

private boolean createArtikelContent(JCRArtikelContent entry) {         
                try {
                        ObjectContentManager ocm = 
ocmFactory.createObjectContentManager();                     
                        ocm.insert(entry);
                        ocm.save();             
                        
                        return true;
                } catch (RepositoryException e) {
                        logger.error(e.getLocalizedMessage(), e);
                        return false;
                } catch (ObjectContentManagerException e) {
                        logger.error(e.getLocalizedMessage(), e);
                        return false;
                }               
        }

When I check with the WebdaV browser in the jackrabbit web application I can 
see it created a Artikel node.

Then I try to read from the repository:

private List<JCRContentNode> getContentEntrysByMenuId(final long menuId, final 
boolean all, final boolean article,
                        final boolean document, final boolean form, final 
boolean report, final boolean independentDocumentsOnly) {             
                        
                try{                    
                                                
                        ObjectContentManager ocm = 
ocmFactory.createObjectContentManager();
                                                
                        org.apache.jackrabbit.ocm.query.QueryManager 
queryManager = ocm.getQueryManager();
                                                
                        Filter filter = 
queryManager.createFilter(JCRArtikelContent.class);
                                                                                
                        org.apache.jackrabbit.ocm.query.Query query = 
queryManager.createQuery(filter);
                                                
                        List<JCRArtikelContent> artikelList = 
(List<JCRArtikelContent>)ocm.getObjects(query);                   
                        
                        
                } catch (Exception e) {                 
                                                
                        e.printStackTrace();
                        logger.error(e.getLocalizedMessage(), e);
                        return null;
                }               
                return null;
}

And I get the following error:

org.apache.jackrabbit.ocm.exception.JcrMappingException: Cannot create instance 
for class de.gwvs.tos.commons.jackrabbit.domain.JCRArtikelContent; nested 
exception is java.lang.InstantiationException: 
de.gwvs.tos.commons.jackrabbit.domain.JCRArtikelContent
java.lang.InstantiationException: 
de.gwvs.tos.commons.jackrabbit.domain.JCRArtikelContent
        at java.lang.Class.newInstance0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at 
org.apache.jackrabbit.ocm.reflection.ReflectionUtils.newInstance(ReflectionUtils.java:172)
        at 
org.apache.jackrabbit.ocm.manager.objectconverter.impl.ObjectConverterImpl.getObject(ObjectConverterImpl.java:388)
        at 
org.apache.jackrabbit.ocm.manager.impl.ObjectContentManagerImpl.getObjects(ObjectContentManagerImpl.java:624)
        at 
org.apache.jackrabbit.ocm.manager.impl.ObjectContentManagerImpl.getObjects(ObjectContentManagerImpl.java:548)
        at 
de.gwvs.tos.commons.jackrabbit.dao.jcr.JCRDaoImpl.getContentEntrysByMenuId(JCRDaoImpl.java:1262)



Anyone have an idea what I am doing wrong?

Thx a lot in Advance!