How can a Spring Webflow application be configured to use Xslt to render its viewstates - spring-mvc

Question

I would like my Spring Webflow app to render its views using XSLT. I managed to get a pure Spring MVC app to render with xslt by configuring an XSLTviewresolver and a controller method that returned an already prepared xml as a source.
But I'm not sure how to apply that to the webflow app.
I've added the configuration for the XSLT view resolver and set the view state to the xsl, then I call the controller method that returns the xml source in the on-render of the view state.So far I only get the xsl back as the output and not the transformed xml or even the raw xml.
EDIT
flow.xml-full
<?xml version="1.0" encoding="UTF-8"?>
<flow xmlns="http://www.springframework.org/schema/webflow"
<view-state id="messageChoice" view="start1">
<transition on="chooseA" to="messageA"/>
<transition on="chooseB" to="messageB"/>
</view-state>
<view-state id="messageA" view="messageA">
<transition on="start" to="messageChoice"/>
</view-state>
<view-state id="messageB" view="xsltview">
<on-render>
<evaluate expression="sampleController.viewXSLT(externalContext.getNativeRequest(),externalContext.getNativeResponse())" result="requestScope.xmlSource"/>
</on-render>
<transition on="start" to="messageChoice"/>
</view-state>
<end-state id="finish"/>
</flow>
controller-snippet
#RequestMapping(value="/viewxslt")
public ModelAndView viewXSLT(HttpServletRequest request,
HttpServletResponse response) throws IOException {
// builds absolute path of the XML file
String xmlFile = "/WEB-INF/xml/thexml.xml";
String contextPath = request.getSession().getServletContext().getRealPath(xmlFile);
String xmlFilePath = ""+contextPath + File.separator + xmlFile;
Source source = new StreamSource(new File(contextPath));
// adds the XML source file to the model so the XsltView can detect
ModelAndView model = new ModelAndView("xsltview");
model.addObject("xmlSource", source);
return model;
}
EDIT
flow-config-full
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
<context:annotation-config />
<context:component-scan base-package="com.genkey.derek" />
<mvc:view-controller path="/start" />
<mvc:view-controller path="/messageHome" />
<mvc:resources location="/" mapping="/resources/**" />
<faces:resources />
<bean class="org.springframework.webflow.mvc.servlet.FlowHandlerMapping">
<property name="flowRegistry" ref="flowRegistry" />
<property name="order" value="3" />
</bean>
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping"/>
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"/>
<bean id="xsltviewresolver" class="org.springframework.web.servlet.view.xslt.XsltViewResolver">
<property name="order" value="1"/>
<property name="sourceKey" value="xmlSource"/>
<property name="viewClass" value="org.springframework.web.servlet.view.xslt.XsltView"/>
<property name="viewNames">
<array>
<value>xsltview</value>
</array>
</property>
<property name="prefix" value="/WEB-INF/xsl/" />
<property name="suffix" value=".xsl" />
</bean>
<bean id="viewFactoryCreator" class="org.springframework.webflow.mvc.builder.MvcViewFactoryCreator">
<property name="viewResolvers">
<list>
<ref bean="xsltviewresolver"/>
<ref bean="faceletsViewResolver" />
</list>
</property>
</bean>
<bean id="faceletsViewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver">
<property name="viewClass" value="org.springframework.faces.mvc.JsfView"/>
<property name="prefix" value="/WEB-INF/pages/" />
<property name="suffix" value=".xhtml" />
<property name="order">
<value>2</value>
</property>
</bean>
<bean class="org.springframework.faces.webflow.JsfFlowHandlerAdapter">
<property name="flowExecutor" ref="flowExecutor" />
</bean>
<webflow:flow-executor id="flowExecutor">
<webflow:flow-execution-listeners>
<webflow:listener ref="facesContextListener"/>
</webflow:flow-execution-listeners>
</webflow:flow-executor>
<webflow:flow-registry id="flowRegistry" flow-builder-services="flowBuilderServices" >
<webflow:flow-location path="WEB-INF/flows/startFlow.xml"/>
</webflow:flow-registry>
<faces:flow-builder-services id="flowBuilderServices" view-factory-creator="viewFactoryCreator" development="true" />
<bean id="facesContextListener" class="org.springframework.faces.webflow.FlowFacesContextLifecycleListener"/>
</beans>