* @return the converted value or the default value if not found
     */
    public static <T> T getValue(final Map<String, Object> doc, final String key, final Class<T> clazz, final T defaultValue) {
        final T value = getValue(doc, key, clazz);
        if (value == null) {
            return defaultValue;
        }
        return value;
    }

    /**

        final List<Map<String, String>> itemList = new ArrayList<>();
        for (final Map.Entry<String, String> entry : System.getenv().entrySet()) {
            itemList.add(createItem(entry.getKey(), entry.getValue()));
        }
        return itemList;
    }

    /**
     * Gets a list of system properties as key-value pairs.
     *
     * @return list of system property items
     */

        final Iterator entries = map.entrySet().iterator();
        while (entries.hasNext()) {
            final Map.Entry entry = (Map.Entry) entries.next();
            entry.setValue(Collections.unmodifiableList((List) entry.getValue()));
        }
        return headerFields = Collections.unmodifiableMap(map);
    }

    @Override
    public Map getHeaderFields() {
        if (headerFields != null) {
            return headerFields;

        return name;
    }

    /**
     * Returns the array of values associated with this request parameter.
     *
     * @return the parameter values array, may be null or empty
     */
    public String[] getValues() {
        return values;
    }

    /**
     * Returns a string representation of this RequestParameter.
     * The format includes the parameter name and its values in array format.
     *

                    final String redirectLocation;
                    if (locationHeader.getValue().startsWith("/")) {
                        redirectLocation = constructRedirectLocation(url, locationHeader.getValue());
                    } else {
                        redirectLocation = locationHeader.getValue();
                    }
                    responseData.setRedirectLocation(redirectLocation);

            if (pos == current) {
                newClientMap.put(Pattern.compile(regex), client);
                added = true;
            }
            newClientMap.put(entry.getKey(), entry.getValue());
            current++;
        }
        if (!added) {
            newClientMap.put(Pattern.compile(regex), client);
        }
        clientMap = newClientMap;
    }

    /**

        assertThat(entry.getValue(), is(sameClass(Integer.class)));
        entry = it.next();
        assertThat(entry.getKey().getName(), is("T2"));
        assertThat(entry.getValue(), is(sameClass(Long.class)));
        entry = it.next();
        assertThat(entry.getKey().getName(), is("T1"));
        assertThat(entry.getValue(), is(sameClass(String.class)));
        entry = it.next();

                parser.setFeature(entry.getKey(), "true".equalsIgnoreCase(entry.getValue()));
            }

            // property
            for (final Map.Entry<String, String> entry : propertyMap.entrySet()) {
                parser.setProperty(entry.getKey(), entry.getValue());
            }

            return parser;
        } catch (final Exception e) {

        for (final Map.Entry<String, Map<String, AccessResultImpl<Long>>> entry : sessionMap.entrySet()) {
            if (entry.getValue() != null) {
                final AccessResultImpl<Long> ar = entry.getValue().get(url);
                if (ar != null) {
                    acList.add(ar);
                }
            }
        }
        // TODO order
        return acList;

    @Override
    public void putAll(final Map<? extends String, ? extends V> map) {
        for (final Map.Entry<? extends String, ? extends V> entry : map.entrySet()) {
            put(convertKey(entry.getKey()), entry.getValue());
        }
    }

    @Override
    public final V remove(final Object key) {
        return super.remove(convertKey(key));
    }

    @Override
    public boolean containsKey(final Object key) {