import java.io.*;
import java.net.*;
import java.util.*;

//extend the CookieHandler class
public class MyCookieHandler extends CookieHandler{

//a store list for cookie
private List<Cookie> myCookieBriefcase=new LinkedList<Cookie>();

//implementing the put method
public void put(URI uri,Map<String,List<String>> responseHeaders)throws
IOException {
   
//a store list for all "Set-Cookie" headers
List<String> getCookies=responseHeaders.get("Set-Cookie");     
   
if(getCookies!=null)
     {         
     ListIterator getCookies_iterator=getCookies.listIterator();
     while(getCookies_iterator.hasNext())
              {
              String cookie_item=(String)getCookies_iterator.next();           
              Cookie cookie=new Cookie(uri,cookie_item);
              
              //checking for duplicate cookies
              ListIterator myCookieBriefcase_iterator=myCookieBriefcase.listIterator();
			  while(myCookieBriefcase_iterator.hasNext())
                  {
                  Cookie cookie_from_briefcase=(Cookie)myCookieBriefcase_iterator.next();
				    if((cookie.getURI().equals(cookie_from_briefcase.getURI()))&& 
                    (cookie.getCookieKey().equals(cookie_from_briefcase.getCookieKey())))
                      {
                      myCookieBriefcase.remove(cookie_from_briefcase);
					  break;
					  }
					 }
					 
          System.out.println("myCookieBriefcase: " + cookie);
		  
          //store the cookie
		  myCookieBriefcase.add(cookie);
		  }
		 }
	}
 
//implementing the get method
public Map<String, List<String>> get(URI uri,Map<String, 
List<String>> requestHeaders)throws IOException {
 
 //keep a copy of requestHeaders
  Map<String, List<String>> setCookies = new HashMap<String,
     List<String>>(requestHeaders);    

 StringBuilder selectCookies=new StringBuilder();
      
      ListIterator myCookieBriefcase_iterator=myCookieBriefcase.listIterator();
	           while(myCookieBriefcase_iterator.hasNext())
            {
            Cookie cookie=(Cookie)myCookieBriefcase_iterator.next();          
            
            //delete all the expired cookies
            if(cookie.ExpireState())
                   {
                   myCookieBriefcase.remove(cookie);
                   }
                   //verify if the current cookie coresponds to the accessed URI
                   else if(cookie.MatchState(uri))
                       {
                       if(selectCookies.length()>0)
                          {
                          //cookies are separated by ", "
                          selectCookies.append(", ");
                          }
                      selectCookies.append(cookie.toString()); 
                      }
           }
        
        //converting the StringBuilder object, selectCookies,to a List object
		        if(selectCookies.length()>0)
           {
           List<String>
		   finalCookies=Collections.singletonList(selectCookies.toString());
		              setCookies.put("Cookie",finalCookies);
           }    
        
    System.out.println("###"+setCookies+"###");       
    
    //set the setCookies as read-only
    Collections.unmodifiableMap(setCookies);
    
    //returning the headers list
    return(setCookies);
    }
  }

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