public ServletHeaderMap(HttpServletRequest request) 
{
        this.request = request;
}

 public  void clear() 
{
       
        throw new UnsupportedOperationException();
}

 public boolean containsKey(Object key) 
{
        return (request.getHeader(key(key)) != null);
}

 public boolean containsValue(Object value) 
{
        Iterator values = values().iterator();
        while (values.hasNext()) {
            if (value.equals(values.next())) {
                return (true);
            }
        }
        return (false);
}

 public Set entrySet() 
{
        Set set = new HashSet();
        Enumeration keys = request.getHeaderNames();
        String key;
        while (keys.hasMoreElements()) {
            key = (String) keys.nextElement();
            set.add(new MapEntry(key, request.getHeader(key), false));
        }
        return (set);
}

 public boolean equals(Object o) 
{
        return (request.equals(o));
}

 public Object get(Object key) 
{
        return (request.getHeader(key(key)));
}

 public int hashCode() 
{
        return (request.hashCode());
}

 public boolean isEmpty() 
{
        return (size() <  1);
}

 public Set keySet() 
{
        Set set = new HashSet();
        Enumeration keys = request.getHeaderNames();
        while (keys.hasMoreElements()) {
            set.add(keys.nextElement());
        }
        return (set);
}

 public Object put(Object key,
    Object value) 
{
        throw new UnsupportedOperationException();
}

 public  void putAll(Map map) 
{
        throw new UnsupportedOperationException();
}

 public Object remove(Object key) 
{
        throw new UnsupportedOperationException();
}

 public int size() 
{
        int n = 0;
        Enumeration keys = request.getHeaderNames();
        while (keys.hasMoreElements()) {
            keys.nextElement();
            n++;
        }
        return (n);
}

 public Collection values() 
{
        List list = new ArrayList();
        Enumeration keys = request.getHeaderNames();
        while (keys.hasMoreElements()) {
            list.add(request.getHeader((String) keys.nextElement()));
        }
        return (list);
}