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package org.hibernate.transaction;

import java.util.Iterator;
import java.util.Properties;
import java.util.Set;

import javax.transaction.TransactionManager;
import org.hibernate.HibernateException;
import org.hibernate.transaction.TransactionManagerLookup;

import org.apache.geronimo.gbean.AbstractName;
import org.apache.geronimo.gbean.AbstractNameQuery;
import org.apache.geronimo.kernel.Kernel;
import org.apache.geronimo.kernel.KernelRegistry;
import org.apache.geronimo.kernel.proxy.ProxyManager;

public class GeronimoTransactionManagerLookup implements
        TransactionManagerLookup {

    public static final String UserTransactionName = "java:comp/UserTransaction";

    public Object getTransactionIdentifier(Transaction arg0) {
		return null;
    }

    public TransactionManager getTransactionManager(Properties props) throws HibernateException {
       /*
         * try { Kernel kernel = KernelRegistry.getSingleKernel(); ProxyManager
         * proxyManager = kernel.getProxyManager(); AbstractNameQuery query =
         * new AbstractNameQuery(TransactionManager.class.getName()); Set names =
         * kernel.listGBeans(query); AbstractName name = null; for (Iterator it =
         * names.iterator(); it.hasNext();) name = (AbstractName) it.next();
         * Object transMg = (Object) proxyManager.createProxy(name,
         * TransactionManager.class); return (TransactionManager)transMg; }catch
         * (Exception e) { e.printStackTrace(); System.out.println(); throw new
         * HibernateException("Geronimo Transaction Manager Lookup Failed", e); }
         */
       try {
       Kernel kernel = KernelRegistry.getSingleKernel();
       AbstractNameQuery query = new AbstractNameQuery(TransactionManager.class.getName ());
       Set<AbstractName> names = kernel.listGBeans(query);
       if (names.size() != 1) {
           throw new IllegalStateException("Expected one transaction manager, not " + names.size());
       }
       AbstractName name = names.iterator().next();
       TransactionManager transMg = (TransactionManager)
       kernel.getGBean(name);
       return (TransactionManager)transMg;
       } catch (Exception e) {
           e.printStackTrace();
           System.out.println();
           throw new HibernateException("Geronimo Transaction Manager Lookup Failed", e);
       }
   }

    public String getUserTransactionName() {
        return UserTransactionName;
    }
}