Re: How to add indexes programatically?

[[EMAIL PROTECTED]]

Thanks all for your input.
Here's my completed method, using Reflection so I can compile against 
other xmldb databases..
I'm getting a strange exception trace in Xindice 1.0, pasted below - I'd 
appreciate any ideas on why I'm getting this...

   /**
    * Xindice only method for adding indexes to a Collection.
    * Pattern uses the following format :
    *         Pattern           Description
    *         =========== 
====================================================
    *          elem       The value of the named element
    *          [EMAIL PROTECTED]  The value of the attribute for the named element
    *          *          The value for all elements
    *          [EMAIL PROTECTED]     The value of the named attribute for all elements
    *          [EMAIL PROTECTED]     The value of all attributes for the named element
    *          [EMAIL PROTECTED]        The value of all attributes for all elements
    */
   public void addIndex(Collection collection, String name, String pattern)
   throws XMLDBException,
          javax.xml.parsers.ParserConfigurationException {
   Service collectionManager; // should be of type 
org.apache.xindice.client.xmldb.services.CollectionManager
   collectionManager = collection.getService("CollectionManager", "1.0");
   logger.info("Creating indexer");
   try {
       DocumentBuilder documentBuilder = 
DocumentBuilderFactory.newInstance().newDocumentBuilder();
       org.w3c.dom.Document document = documentBuilder.newDocument();
       org.w3c.dom.Element element = document.createElement("index");
       document.appendChild(element);
       
element.setAttribute("class","org.apache.xindice.core.indexer.ValueIndexer");
       element.setAttribute("name",name);
       element.setAttribute("pattern",pattern);
       //element.setAttribute("type","");      // optional
       //element.setAttribute("pagesize","");  // optional
       //element.setAttribute("maxkeysize","");// optional
       Method createIndexerMethod = 
collectionManager.getClass().getDeclaredMethod("createIndexer",
                                           new 
Class[]{org.w3c.dom.Document.class});
       Object args[] = new Object[]{document};
       createIndexerMethod.invoke(collectionManager,args);
     
   }
   catch (Throwable t) {
       t.printStackTrace();
   }
   }

Here's my exception trace in the Xindince server, called with parameters 
name="ArbitraryName" and pattern="*"  :

java.lang.NullPointerException
       at org.apache.xindice.core.filer.BTree.findValue(BTree.java:213)
       at org.apache.xindice.core.filer.BTree.findBTreeRoot(BTree.java:292)
       at 
org.apache.xindice.core.indexer.ValueIndexer.add(ValueIndexer.java:345)
       at 
org.apache.xindice.core.indexer.IndexManager$SAXHandler.processEntry(IndexManager.java:500)
       at 
org.apache.xindice.core.indexer.IndexManager$SAXHandler.endElement(IndexManager.java:538)
       at 
org.apache.xindice.xml.sax.SAXEventGenerator.processContainer(SAXEventGenerator.java:330)
       at 
org.apache.xindice.xml.sax.SAXEventGenerator.processContainer(SAXEventGenerator.java:269)
       at 
org.apache.xindice.xml.sax.SAXEventGenerator.processContainer(SAXEventGenerator.java:269)
       at 
org.apache.xindice.xml.sax.SAXEventGenerator.processContainer(SAXEventGenerator.java:269)
       at 
org.apache.xindice.xml.sax.SAXEventGenerator.start(SAXEventGenerator.java:342)
       at 
org.apache.xindice.core.indexer.IndexManager$SAXHandler.<init>(IndexManager.java:462)
       at 
org.apache.xindice.core.indexer.IndexManager$SAXHandler.<init>(IndexManager.java:478)
       at 
org.apache.xindice.core.indexer.IndexManager.addDocument(IndexManager.java:392)
       at 
org.apache.xindice.core.Collection.putDocument(Collection.java:627)
       at 
org.apache.xindice.core.Collection.insertDocument(Collection.java:659)
       at 
org.apache.xindice.client.corba.CollectionServant.insertDocument(CollectionServant.java:317)
       at 
org.apache.xindice.client.corba.db.CollectionPOA._invoke(CollectionPOA.java:181)
       at org.openorb.adapter.poa.POA.dispatch(POA.java:975)
       at 
org.openorb.net.AbstractServerRequest.dispatch(AbstractServerRequest.java:750)
       at 
org.openorb.net.ServerManagerImpl.serve_request(ServerManagerImpl.java:1467)
       at 
org.openorb.net.ServerManagerImpl.thread_pool_main(ServerManagerImpl.java:1410)
       at 
org.openorb.net.ServerManagerImpl.access$200(ServerManagerImpl.java:77)
       at 
org.openorb.net.ServerManagerImpl$PoolThread.run(ServerManagerImpl.java:1557)
DEBUG> Index Creation: batchIndex
DEBUG> Index Complete: batchIndex
DEBUG> Populated Indexes: 187ms