Spring Mobile + Struts2

[nmc]

Trying to get a simple Spring Mobile + Struts2 web application going but having some troubles getting the basics to work...

In web.xml

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>
        /WEB-INF/applicationContext.xml
    </param-value>
</context-param> 
<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter>
    <filter-name>deviceResolverRequestFilter</filter-name>
    <filter-class>org.springframework.mobile.device.DeviceResolverRequestFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>deviceResolverRequestFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

In applicationContext.xml

<beans:beans xmlns="http://www.springframework.org/schema/mvc"
        xmlns:beans="http://www.springframework.org/schema/beans"
        xmlns:device="http://www.springframework.org/schema/mobile/device"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xsi:schemaLocation="http://www.springframework.org/schema/mvc 
                http://www.springframework.org/schema/mvc/spring-mvc-3.1.xsd
                http://www.springframework.org/schema/beans 
                http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
                http://www.springframework.org/schema/mobile/device 
                http://www.springframework.org/schema/mobile/device/spring-mobile-device-1.0.xsd">

    <!-- Interceptors that execute common control logic across multiple requests -->
    <interceptors>
        <!-- Detects the client's Device -->
        <beans:bean class="org.springframework.mobile.device.DeviceResolverHandlerInterceptor" />
    </interceptors>

</beans:beans>

In my Java class:

public class TestAction extends ActionSupport implements ServletRequestAware {

    // So that we can lookup the current Device 
    private HttpServletRequest request;

    public void setServletRequest(HttpServletRequest request) {
        this.request = request;
    }

    @Override
    public String execute() {
        Device currentDevice = DeviceUtils.getCurrentDevice(request);
        if (currentDevice.isMobile()) // <-- fails here with NPE

Why is the device not set and resulting as null?

Log files seem to indicate a problem with setting the interceptor but I'm still not sure where I went wrong.

2012-05-29 09:36:36,696 DEBUG [ConstructorResolver.java:201] : Ignoring constructor [public org.springframework.web.servlet.handler.MappedInterceptor(java.lang.String[],org.springframework.web.context.request.WebRequestInterceptor)] of bean 'org.springframework.web.servlet.handler.MappedInterceptor#0': org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.web.servlet.handler.MappedInterceptor#0': Unsatisfied dependency expressed through constructor argument with index 1 of type [org.springframework.web.context.request.WebRequestInterceptor]: Could not convert constructor argument value of type [org.springframework.mobile.device.DeviceResolverHandlerInterceptor] to required type [org.springframework.web.context.request.WebRequestInterceptor]: Failed to convert value of type 'org.springframework.mobile.device.DeviceResolverHandlerInterceptor' to required type 'org.springframework.web.context.request.WebRequestInterceptor'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.mobile.device.DeviceResolverHandlerInterceptor] to required type [org.springframework.web.context.request.WebRequestInterceptor]: no matching editors or conversion strategy found

Cross posted to Stackoverflow