Problem w/ com.sapportals.portal.security.usermanagement.IUser in EP6 SP2

I'm trying to develop a program to read through a KM repository, but before I get started I must get around the issue of establishing a ResourceContext (which needs a valid com.sapportals.portal.security.usermanagement.IUser passed to it)...

Anyway does anyone have any ideas as to why I'm having the following issues with the code that I have below:

package src.api;

import com.sapportals.wcm.util.uri.RID;

import com.sapportals.portal.security.usermanagement.IUser;

import com.sapportals.wcm.util.usermanagement.WPUMFactory;

import com.sapportals.portal.prt.session.IUserContext;

import com.sapportals.portal.prt.component.*;

public class MyComponent extends AbstractPortalComponent

{

public void doContent(IPortalComponentRequest request, IPortalComponentResponse response)

{

System.out.println("dan88");

System.out.println("dan test222");

response.write("testing 2 ");

RID rid = RID.getRID("/Corporate Services");

System.out.println(rid.toString());

System.out.println("dan test222");

//Issue need to:

//IResourceContext ctxt = new

//ResourceContext(com.sapportals.portal.security.usermanagement.IUser);

//Need a com.sapportals.portal.security.usermanagement.IUser

//Also No java doc for com.sapportals.portal.security.usermanagement.IUser

// #1

try

{

IUser loggedOnUser = (IUser)request.getUser().getUser();

// Exception caught ...java.lang.ClassCastException: com.sapportals.portal.

// security.usermanagement.User50_Impl

String user = loggedOnUser.getId();

System.out.println(user);

}

catch (Exception ex)

{

// System.err.println("Exception caught ..." + ex);

System.out.println("Exception caught ..." + ex);

}

// #2

try

{

IUser user = WPUMFactory.getUserFactory().getEP5User(request.getUser());

//Exception caught ...java.lang.NullPointerException

System.out.println("made it!");

}

catch (Exception ex)

{

// System.err.println("Exception caught ..." + ex);

System.out.println("Exception caught ..." + ex);

}

// #3

try

{

//IUser user = WPUMFactory.getUserFactory().getEP5User();

// No java doc for com.sapportals.portal.security.usermanagement.IUserFactory

System.out.println("number 3!");

}

catch (Exception ex)

{

// System.err.println("Exception caught ..." + ex);

System.out.println("Exception caught ..." + ex);

}

// #4

try

{

System.out.println("in 4!");

//String userID = request.getUser().getUserID();

//String userID2 = ((IUser) request.getUser().getUser()).getDisplayID();

IUserContext userContext = request.getUser();

System.out.println("did first instruction");

IUser user = (IUser) userContext.getUser();

System.out.println("made it!");

}

catch (Exception ex)

{

// System.err.println("Exception caught ..." + ex);

System.out.println("Exception caught ..." + ex);

}

System.out.println("donexx");

}

}

The log yields the following:

dan88

dan test222

/Corporate Services

dan test222

Exception caught ...java.lang.ClassCastException: com.sapportals.portal.security

.usermanagement.User50_Impl

Exception caught ...java.lang.NullPointerException

number 3!

in 4!

did first instruction

Exception caught ...java.lang.ClassCastException: com.sapportals.portal.security

.usermanagement.User50_Impl

donexx

Any thoughts on this would be greatly appreciated!