RE: Problem reading from Repository useing ocm

[Ye, Forest (MAN-Corporate)]

It seems you do not have a default constructor.





-----Original Message-----
From: Kurz Wolfgang [mailto:wolfgang.k...@gwvs.de] 
Sent: Friday, January 23, 2009 5:27 AM
To: users@jackrabbit.apache.org
Subject: Problem reading from Repository useing ocm

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(Reflect
ionUtils.java:172)
        at
org.apache.jackrabbit.ocm.manager.objectconverter.impl.ObjectConverterIm
pl.getObject(ObjectConverterImpl.java:388)
        at
org.apache.jackrabbit.ocm.manager.impl.ObjectContentManagerImpl.getObjec
ts(ObjectContentManagerImpl.java:624)
        at
org.apache.jackrabbit.ocm.manager.impl.ObjectContentManagerImpl.getObjec
ts(ObjectContentManagerImpl.java:548)
        at
de.gwvs.tos.commons.jackrabbit.dao.jcr.JCRDaoImpl.getContentEntrysByMenu
Id(JCRDaoImpl.java:1262)



Anyone have an idea what I am doing wrong?

Thx a lot in Advance!