return (request.getParameter(key(key)) != null);
    }


    /** {@inheritDoc} */
    public boolean containsValue(Object value) {
        Iterator<String> values = values().iterator();
        while (values.hasNext()) {
            if (value.equals(values.next())) {
                return (true);
            }
        }
        return (false);
    }


    /** {@inheritDoc} */
    @SuppressWarnings("unchecked")
    public Set<Map.Entry<String, String>> entrySet() {
        Set<Map.Entry<String, String>> set = new HashSet<Map.Entry<String, String>>();
        Enumeration<String> keys = request.getParameterNames();

        return (request.getParameterValues(key(key)));
    }


    /** {@inheritDoc} */
    public int hashCode() {
        return (request.hashCode());
    }


    /** {@inheritDoc} */
    public boolean isEmpty() {
        return (size() < 1);
    }


    /** {@inheritDoc} */
    @SuppressWarnings("unchecked")
    public Set<String> keySet() {
        Set<String> set = new HashSet<String>();
        Enumeration<String> keys = request.getParameterNames();
        while (keys.hasMoreElements()) {
            set.add(keys.nextElement());
        }
        return (set);
    }


    /** {@inheritDoc} */
    public String[] put(String key, String[] value) {

        Enumeration<String> keys = request.getParameterNames();
        while (keys.hasMoreElements()) {
            set.add(keys.nextElement());
        }
        return (set);
    }


    /** {@inheritDoc} */
    public String put(String key, String value) {
        throw new UnsupportedOperationException();
    }


    /** {@inheritDoc} */
    public void putAll(Map<? extends String, ? extends String> map) {
        throw new UnsupportedOperationException();
    }


    /** {@inheritDoc} */
    public String remove(Object key) {
        throw new UnsupportedOperationException();
    }


    /** {@inheritDoc} */
    @SuppressWarnings("unchecked")
    public int size() {
        int n = 0;
        Enumeration<String> keys = request.getParameterNames();