Detecção Server Side Tablet/Mobile

ress.java

//dep maven

           //     <!-- identificar browser do usuário -->
             //   <dependency>
               //         <groupId>bitwalker</groupId>
//                        <artifactId>UserAgentUtils</artifactId>
//                        <version>1.9</version>
//                </dependency>
        private static String getUserAgentString() {
                return ((HttpServletRequest) getContext().getExternalContext()
                                .getRequest()).getHeader("User-Agent");
        }

        private static UserAgent getUserAgent() {
        String userAgentString = getUserAgentString();
        if(Strings.isNullOrEmpty(userAgentString)) {
            return null;
        }
                return UserAgent.parseUserAgentString(userAgentString);
        }

    public static boolean isBrowserChromeDesktop() {
        String userAgentString = JsfUtil.getUserAgentString();
        if (JsfUtil.isRequestedFromMobileOrTablet() || Strings.isNullOrEmpty(userAgentString)) {
            return false;
        }
        return Browser.CHROME.isInUserAgentString(userAgentString);
    }

        public static boolean isRequestedFromMobileOrTablet() {
        UserAgent ua = getUserAgent();
                if (ua == null || ua.getOperatingSystem() == null
                                || ua.getOperatingSystem().getDeviceType() == null) {
                        return false;
                }
                return ua.getOperatingSystem().getDeviceType() == DeviceType.MOBILE
                                || ua.getOperatingSystem().getDeviceType() == DeviceType.TABLET;
        }

        private static FacesContext getContext() {

                return FacesContext.getCurrentInstance();

        }