}

    /**
     * Encodes a URL path for filtering.
     *
     * @param path The path to encode.
     * @return The encoded path.
     */
    public String encodeUrlFilter(final String path) {
        if (filterPathEncoding == null || path == null) {
            return path;
        }

        try {
            final StringBuilder buf = new StringBuilder(path.length() + 100);

        String path = null;
        assertNull(systemHelper.encodeUrlFilter(path));

        path = "abc";
        assertEquals(path, systemHelper.encodeUrlFilter(path));

        path = "あいう";
        assertEquals("%E3%81%82%E3%81%84%E3%81%86", systemHelper.encodeUrlFilter(path));

        path = "[]^$.*+?,{}|%\\";
        assertEquals(path, systemHelper.encodeUrlFilter(path));

        systemHelper.filterPathEncoding = null;