Using HibernateQL in XWiki ?

Hi, I'd like to do a kind of SQL request with XWiki in order to get a data store in an Object. Here's my problem : 1 I've created a Class in XWiki in order to create a form for users. In this class I've named one of a property ID that should allow me to distinct objects. 2. I've created a template associated to this class that contain a single Object of this class. 3. I've created a Form to allow users to fill the data. The problem I have is that I have to give a unique name for the document created. Thus I thought to use to ID property that I've created. So I wanted to do a SQL Query to get the maximum id and by this way my new document name would be Data.Doc"ID+1". The problem is that I don't know how to access the desired property with XWiki. I've read the documentation about the data model : http://www.xwiki.org/xwiki/bin/view/DevGuide/Database+Schema but I didn't find the solution to my problem. If I execute the following Query (my class is XWiki.CFPClass): #set ($sql = "select distinct obj from XWikiDocument as doc, BaseObject as obj where obj.name=doc.fullName and obj.className='XWiki.CFPClass' and doc.name!='CFPClassTemplate'") with this code : #foreach ($item in $xwiki.search($sql)) $item <br /> #end I get fine my objects : CFP.Test 0 XWiki.CFPClass CFP.Test1 0 XWiki.CFPClass But I don't know how can I reach the property ? The property class seems to be 'BaseProperty' but I don't know how can I add it with the query. if I test a query like this : select distinct prop.name from XWikiDocument as doc, BaseObject as obj, BaseProperty as prop where obj.name=doc.fullName and obj.className='XWiki.CFPClass' and doc.name!='CFPClassTemplate' I get all the existing properties even the ones which aren't in the class XWiki.CFPClass. Any Idea ? -- Xavier MOGHRABI - Consortium ObjectWeb Email: xavier.moghrabi at objectweb.org Phone: +33 4 76 61 52 35 - Skype ID: xavier.moghrabi.bureau