Improve isMyFacesInUse check

The check now accounts for the possibility of a FacesContextFactory
being wrapped.

Issue: SWF-1650

spring-faces/src/main/java/org/springframework/faces/webflow/JsfRuntimeInformation.java

@@ -16,6 +16,7 @@
 
 package org.springframework.faces.webflow;
 
+import javax.faces.FacesWrapper;
 import javax.faces.FactoryFinder;
 import javax.faces.context.FacesContext;
 
@@ -25,7 +26,8 @@ import org.springframework.util.ReflectionUtils;
 import org.springframework.webflow.execution.RequestContext;
 
 /**
- * Helper class to provide information about the JSF runtime environment such as JSF version and implementation.
+ * Helper class to provide information about the JSF runtime environment such as
+ * JSF version and implementation.
  *
  * @author Rossen Stoyanchev
  * @author Phillip Webb
@@ -89,7 +91,10 @@ public class JsfRuntimeInformation {
 		try {
 			Class<?> clazz = classLoader.loadClass("org.apache.myfaces.context.FacesContextFactoryImpl");
 			Object factory = FactoryFinder.getFactory(FactoryFinder.FACES_CONTEXT_FACTORY);
-			return clazz.isInstance(factory);
+			while (!clazz.isInstance(factory) && factory instanceof FacesWrapper) {
+				factory = ((FacesWrapper) factory).getWrapped();
+			}
+			return (factory != null && clazz.isInstance(factory));
 		}
 		catch (Throwable ex) {
 			return false;

spring-faces/src/main/java/org/springframework/faces/webflow/context/portlet/PortletFacesContextFactory.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2004-2012 the original author or authors.
+ * Copyright 2004-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,6 +29,7 @@ import org.springframework.faces.webflow.JsfRuntimeInformation;
 /**
  * {@link FacesContextFactory} to support portlet environments.
  * @author Phillip Webb
+ * @author Rossen Stoyanchev
  */
 public class PortletFacesContextFactory extends FacesContextFactory {
 
@@ -38,6 +39,12 @@ public class PortletFacesContextFactory extends FacesContextFactory {
 		this.factory = factory;
 	}
 
+
+	@Override
+	public FacesContextFactory getWrapped() {
+		return this.factory;
+	}
+
 	@Override
 	public FacesContext getFacesContext(Object context, Object request, Object response, Lifecycle lifecycle)
 			throws FacesException {