XML import - Mapping Exception: Unknown Entity

firebug · **Joined:** Tue Nov 29, 2005 2:43 am **Posts:** 9

I am using hibernate version 3.0.5. I am trying to export/import data from and to hibernate objects. I have been successfully managed to export the data from hibernate object using DOM4J.
However, when I try to import the same XML using dom4jsession it generates an error. Following is the call stack:

My mapping file is as follows:

Following is a part of the XML that I try to import:

<CategoryName metadataid="1" version="16"><skillname>1</skillname><skillname>2</skillname><skillname>3</skillname><skillname>4</skillname><skillname>5</skillname><skillname>6</skillname><skillname>7</skillname><skillname>8</skillname><skillname>9</skillname><skillname>10</skillname><skillname>11</skillname><skillname>12</skillname><skillname>187</skillname><skillname>188</skillname><skillname>189</skillname><name>Infrastructure</name><description>Infrastructure skills include all the setup and configuration of the various tools and systems required for work to happen</description><displayorder>0</displayorder><wfp wfpid="1"/></CategoryName>

I am using the following code to import the data from the XML:

Code:

           Document doc = reader.read(file);        
 
               
            Element root = doc.getRootElement();
                
            Session session = HibernateWrapper.currentSession();
            Session dom4jSession = session.getSession(EntityMode.DOM4J);
        
            CommonService commonService = (CommonService) IoC.getFactory().getInstance("CommonService");
            Iterator i  = root.elementIterator();
            Transaction tx = dom4jSession.beginTransaction();
                
            while(i.hasNext()) 
            {
                 Element element = (Element) i.next();
                 dom4jSession.replicate("CategoryName", element,ReplicationMode.OVERWRITE);
                 session.flush();             
            }             
                
             tx.commit();  

I have tried using saveorUpdate method instead of the replicate, but it did the same. Can someone help? Thanks.

steckemetz · **Posted:** Tue Nov 29, 2005 6:58 am

I do not use dom4j, so I am not sure if I am right here.
But in method:

Code:

Session.replicate(String entityName, Object object, ReplicationMode replicationMode)

the entityName is related to an entityName in your mapping like:

Code:

   <class name="MyBase"
      table="base1"
      entity-name="MyBase1">

Not sure though.

steve · **Posted:** Tue Nov 29, 2005 1:47 pm

steckemetz is correct. The entity-name for the mapping you provided is actually "wfp.domain.CategoryName" since you did not override it in the mapping file. So one of two choices:
1) change the mapping:

Code:

<class name="CategoryName"   
        entity-name="CategoryName"
        table="category_name" 
        node="CategoryName"> 
    ...

2) change the API call:

Code:

dom4jSession.replicate( 
        CategoryName.class.getName(),
        element,
        ReplicationMode.OVERWRITE
);

firebug · **Joined:** Tue Nov 29, 2005 2:43 am **Posts:** 9

Thanks guys. I did as per Steve’s second suggestion and it worked!. If I put the entity-name it gave me some spurious errors.