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

 public  void clear() 
{
       
        Iterator keys = keySet().iterator();
        while (keys.hasNext()) {
            request.removeAttribute((String) keys.next());
        }
}

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

 public boolean containsValue(Object value) 
{
        if (value == null) {
            return (false);
        }
        Enumeration keys = request.getAttributeNames();
        while (keys.hasMoreElements()) {
            Object next = request.getAttribute((String) keys.nextElement());
            if (value.equals(next)) {
                return (true);
            }
        }
        return (false);
}

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

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

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

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

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

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

 public Object put(Object key,
    Object value) 
{
        if (value == null) {
            return (remove(key));
        }
        String skey = key(key);
        Object previous = request.getAttribute(skey);
        request.setAttribute(skey, value);
        return (previous);
}

 public  void putAll(Map map) 
{
        Iterator entries = map.entrySet().iterator();
        while (entries.hasNext()) {
            Map.Entry entry = (Map.Entry)entries.next();
            put(entry.getKey(), entry.getValue());
        }
}

 public Object remove(Object key) 
{
        String skey = key(key);
        Object previous = request.getAttribute(skey);
        request.removeAttribute(skey);
        return (previous);
}

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

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