import java.util.*;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.rmi.PortableRemoteObject;

public class DvdClient {

   public static void main(String[] args) 
   {
       try {
           Context initialContext = new InitialContext();
           Object initialContextObject = 
             initialContext.lookup("java:comp/env/ejb/SimpleDvd");

           DvdHome dvdHome = 
             (DvdHome)PortableRemoteObject.narrow(initialContextObject, 
                                                  DvdHome.class);

           Dvd bis;
           Collection dvdCheck;
           Iterator dvdCheckIterator;
           //Check to see if this pk already exists. 
           //Maybe not an efficent way to do things, 
           //  but an interesting example.
           dvdCheck = dvdHome.findByIsbn("078063344X");
           if (dvdCheck.isEmpty()) {
              bis = 
            	dvdHome.create("078063344X", "Best of Show", "WS   ");
           } else {
              dvdCheckIterator = dvdCheck.iterator();
              bis = (Dvd)dvdCheckIterator.next();
           }  
           
           System.out.println("after create: " + bis.getAsString());  
           bis.setTitle("Best in Show");  
           System.out.println("after change title: " + 
                              bis.getAsString());

           Collection collection = dvdHome.findByTitle("Best in Show");
           Iterator iterator=collection.iterator();
           while (iterator.hasNext()) {
              Dvd dvd = (Dvd)iterator.next();
              System.out.println("in bis loop: " + dvd.getAsString());
           } 
           
           Dvd rlr = null;
           dvdCheck = dvdHome.findByIsbn("076783738X");
           if (dvdCheck.isEmpty()) {
              rlr = dvdHome.create("076783738X", 
                                   "Run Lola Run",
                                   "WS-FS");
           }
             
           Dvd pf = null;
           dvdCheck = dvdHome.findByIsbn("0780634551");
           if (dvdCheck.isEmpty()) {
               pf = dvdHome.create("0780634551", 
                                   "Pink Flamingos",      
                                    "WS   ");
           }  
           
           Dvd sil = null;
           dvdCheck = dvdHome.findByIsbn("0788818937");
           if (dvdCheck.isEmpty()) {
               sil = dvdHome.create("0788818937", 
                                    "Shakespeare in Love", 
                                    "WS   ");
           }       
           
           Dvd tpb = null;
           dvdCheck = dvdHome.findByIsbn("0792850769");
           if (dvdCheck.isEmpty())
           {
               tpb = dvdHome.create("0792850769", 
                                    "The Princess Bride",  
                                    "WS   ");     
           } 
           
           collection = dvdHome.findByTitleWith("in");
           iterator=collection.iterator();
           while (iterator.hasNext()) {
              Dvd dvd = (Dvd)iterator.next();
              System.out.println("in like loop: " + dvd.getAsString());
           }

           if (bis != null) {bis.remove();}
             //note: will remove from table
           if (rlr != null) {rlr.remove();}
             //note: will remove from table only if we created rlr 
             //  in this run
           if (pf  != null) {pf.remove();}
             //note: will remove from table only if we created pf 
             //  in this run  
           if (sil != null) {sil.remove();}
             //note: will remove from table only if we created sil
             //  in this run
           if (tpb != null) {tpb.remove();}
             //note: will remove from table only if we created tpb 
             //  in this run

       } catch (Exception exception) {
           System.err.println("Caught an exception." );
           exception.printStackTrace();
       }
   } 
}