import java.io.*;
import java.security.*;
import java.security.acl.*;
import java.util.*;
import java.math.*;

import com.sun.server.realm.*;
import com.sun.server.realm.util.*;

public abstract class UserEntityImpl implements UserEntity
{
	private CustomRealm realm = null;

	public UserEntityImpl(CustomRealm aRealm) throws IOException
	{
		super();
		realm = aRealm;
	}

	public CustomRealm getRealm()
	{
		return realm;
	}

	public Enumeration getUserNames() throws BadRealmException
	{
		throw new BadRealmException("Cannot list users in this realm.");
	}

	public boolean authenticate(String userName, String plainTextPassword)
			throws NoSuchUserException
	{
		throw new NoSuchUserException(userName);
	}

	public User getUser(String name) 
		throws NoSuchUserException, BadRealmException
	{
		throw new NoSuchUserException(name);
	}

	public void delete(String userName)
		throws NoSuchUserException, BadRealmException
	{
		throw new BadRealmException("Cannot delete users in this realm.");
	}
}