Re: To create indexes (warning: Xindice only)

[[EMAIL PROTECTED]]

Yes, it was in response to your question - thought if i change the title 
people will find the mesage more freqenetly in the forums search.

I need the reflection because I compile my classes using the xml:db api, 
not a specific db like eXist or Xindice.
I prefer coding to the Xml:Db api, and using reflection for anything 
inbetween which is not standard, since you can easily just trap the 
exception at runtime if the underlying service
doesn't exist.


Cheers.
wh
Upayavira wrote:
If this was in response to my comment, thanks. It seems that my code 
is fine. Only thing I notice about yours is that you use reflection 
unnecessarily near the end. Instead of:

      Method createIndexerMethod = 
collectionManager.getClass().getDeclaredMethod("createIndexer",
                                          new 
Class[]{org.w3c.dom.Document.class});
      Object args[] = new Object[]{document};
      createIndexerMethod.invoke(collectionManager,args);

You could just do collectionManager.createIndexer(document); which I 
think would be easier ;-)

Regards, Upayavira
[EMAIL PROTECTED] wrote:
   /**
    * 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);
      //         logger.debug("Listing indexes:");
//         String[] idx = collectionManager.listIndexers();
//         for (int i = 0; i < idx.length; i++) {
//         logger.debug("initializeXMLDB - " + i + " - " + idx[i]);
//         }
//         logger.debug("initializeXMLDB - Total Indexes: " + 
idx.length);
   }
   catch (Throwable t) {
       t.printStackTrace();
   }
   }