portalURLWriter throws string ClassCastException

[E Paisley]

Has anyone ever used the portalURLWriter to generate a portal link to another portlet? I'm attempting to do so and I keep getting a
java.lang.ClassCastException: java.lang.String on the code below where I call the portalURLWriter.writePortletRenderURL. How can I fix this?

  FacesContext fC=FacesContext.getCurrentInstance();
		    com.ibm.faces.portlet.httpbridge.PortletRequestWrapper request =

		    	(PortletRequestWrapper)FacesContext.getCurrentInstance().getExternalContext().getRequest();

		    javax.portlet.PortletRequest prequest = request.getPortletRequest(); 
		    
		    com.ibm.faces.portlet.httpbridge.PortletResponseWrapper response =

		    	(PortletResponseWrapper)FacesContext.getCurrentInstance().getExternalContext().getResponse();

		    javax.portlet.PortletResponse presponse = response.getPortletResponse(); 
		    
		    
		    log.debug("Get portalURLWriter");
		    PortalURLWriter portalURLWriter = 
	            portalURLGenerationService.getPortalURLWriter(
	            		prequest,presponse);

		    
		    
		    
		    StringWriter writer = new StringWriter();

	        log.debug("set params to pass");
		    Map actionParams = new HashMap();
		    actionParams.put("inputProperty", theNumber);
		    actionParams.put("ACTION_NAME_PARAM","ReceiveListForDetails");
	       
			
	        String redriectURL;
	        log.debug("begin redirect");
			try {
				 
				redriectURL = portalURLWriter.writePortletRenderURL(
						writer, 
				        "site.home.listdetails",
				        "site.home.listdetails.listdetailsportlet",
				        actionParams).toString();
				log.debug(redriectURL);
				log.debug("REDIRECT!");
				fC.getExternalContext().redirect(redriectURL);
			} catch (Exception e) {
				// TODO Auto-generated catch block
				log.error(e.getMessage());
				log.error(e.getCause());
				log.error("error!!!!",e);
				e.printStackTrace();
			}
	}   

Here is the stack trace:

   java.lang.ClassCastException: java.lang.String
	at com.ibm.wps.state.accessors.portlet.PortletAccessorControllerImpl$ModifiableLoader.add(PortletAccessorControllerImpl.java:103)
	at com.ibm.wps.state.accessors.collections.MapControllerUtil.add(MapControllerUtil.java:73)
	at com.ibm.wps.state.accessors.portlet.PortletAccessorControllerImpl$ModifiableLoader.add(PortletAccessorControllerImpl.java:85)
	at com.ibm.wps.state.accessors.collections.MapOnNode.putAll(MapOnNode.java:708)
	at com.ibm.wps.state.services.PortalURLWriterImpl.writePortletRenderURL(PortalURLWriterImpl.java:580)
	at com.woodmen.bottomline.pagecode.BottomLineWho.sendToCertificateList(BottomLineWho.java:4741)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java(Compiled Code))
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled Code))
	at java.lang.reflect.Method.invoke(Method.java(Compiled Code))
	at com.sun.faces.el.MethodBindingImpl.invoke(MethodBindingImpl.java:127)
	at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:73)
	at com.ibm.faces.webapp.RequestPhaseListener.afterPhase(RequestPhaseListener.java:101)
	at com.ibm.faces.portlet.FacesPortlet.restoreView(FacesPortlet.java:1230)
	at com.ibm.faces.portlet.FacesPortlet.doRender(FacesPortlet.java:367)
	at com.ibm.faces.portlet.FacesPortlet.doView(FacesPortlet.java:415)
	at com.ibm.faces.portlet.FacesPortlet.doDispatch(FacesPortlet.java:303)
	at javax.portlet.GenericPortlet.render(GenericPortlet.java:163)
	at com.ibm.wps.pe.pc.std.cmpf.impl.PortletFilterChainImpl.render(PortletFilterChainImpl.java:144)
	at com.ibm.wps.pe.pc.std.invoker.impl.PortletServlet.dispatch(PortletServlet.java:130)
	at com.ibm.wps.pe.pc.std.invoker.impl.PortletServlet.doGet(PortletServlet.java:69)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
	at com.ibm.wps.pe.pc.std.cache.CacheablePortlet.service(CacheablePortlet.java:393)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:670)
	at com.ibm.wps.pe.om.definition.impl.ServletDefinitionImpl$RDWrapper.include(ServletDefinitionImpl.java:419)
	at com.ibm.wps.pe.pc.std.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:206)
	at com.ibm.wps.pe.pc.std.invoker.impl.PortletInvokerImpl.invoke(PortletInvokerImpl.java:168)
	at com.ibm.wps.pe.pc.std.invoker.impl.PortletInvokerImpl.render(PortletInvokerImpl.java:97)
	at com.ibm.wps.pe.pc.std.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:110)
	at com.ibm.wps.pe.pc.PortletContainerImpl.doRenderPortlet(PortletContainerImpl.java:587)
	at com.ibm.wps.pe.ext.render.AbstractRenderManager.performService(AbstractRenderManager.java:264)
	at com.ibm.wps.pe.pc.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:115)
	at com.ibm.wps.engine.tags.PortletRenderTag.doStartTag(PortletRenderTag.java:161)
	at com.ibm._jsp._Control._jspx_meth_portal$1skin_portletRender_0(_Control.java:213)
	at com.ibm._jsp._Control._jspx_meth_portal$1logic_if_1(_Control.java:245)
	at com.ibm._jsp._Control._jspService(_Control.java:130)
	at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:93)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java(Compiled Code))
	at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:121)
	at com.ibm.ws.jsp.webcontainerext.JSPExtensionServletWrapper.handleRequest(JSPExtensionServletWrapper.java:215)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:670)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.handleRequest(DispatcherServiceImpl.java:87)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.include(DispatcherServiceImpl.java:52)
	at com.ibm.wps.services.dispatcher.Dispatcher.include(Dispatcher.java:45)
	at com.ibm.wps.engine.templates.skins.Default.render(Default.java:118)
	at com.ibm.wps.engine.templates.SkinTemplate.render(SkinTemplate.java:71)
	at com.ibm.wps.composition.elements.Component.render(Component.java:782)
	at com.ibm.wps.composition.elements.Control.render(Control.java:132)
	at com.ibm.wps.composition.Composition.render(Composition.java:2586)
	at com.ibm.websphere.personalization.transformation.PznTransformationLayoutModel.render(PznTransformationLayoutModel.java:70)
	at com.ibm.wps.model.wrappers.LayoutModelWrapperFactoryImpl$LayoutModelWrapperImpl.render(LayoutModelWrapperFactoryImpl.java:218)
	at com.ibm.wps.engine.tags.ComponentRenderTag.doStartTag(ComponentRenderTag.java:89)
	at com.ibm._jsp._UnlayeredContainer_2D_V._jspx_meth_portal$1skin_layoutNodeRender_0(_UnlayeredContainer_2D_V.java:246)
	at com.ibm._jsp._UnlayeredContainer_2D_V._jspService(_UnlayeredContainer_2D_V.java:150)
	at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:93)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java(Compiled Code))
	at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:121)
	at com.ibm.ws.jsp.webcontainerext.JSPExtensionServletWrapper.handleRequest(JSPExtensionServletWrapper.java:215)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:670)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.handleRequest(DispatcherServiceImpl.java:87)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.include(DispatcherServiceImpl.java:52)
	at com.ibm.wps.services.dispatcher.Dispatcher.include(Dispatcher.java:45)
	at com.ibm.wps.engine.templates.skins.Default.render(Default.java:118)
	at com.ibm.wps.engine.templates.SkinTemplate.render(SkinTemplate.java:71)
	at com.ibm.wps.composition.elements.Component.render(Component.java:782)
	at com.ibm.wps.composition.Composition.render(Composition.java:2586)
	at com.ibm.websphere.personalization.transformation.PznTransformationLayoutModel.render(PznTransformationLayoutModel.java:70)
	at com.ibm.wps.model.wrappers.LayoutModelWrapperFactoryImpl$LayoutModelWrapperImpl.render(LayoutModelWrapperFactoryImpl.java:218)
	at com.ibm.wps.engine.tags.ComponentRenderTag.doStartTag(ComponentRenderTag.java:89)
	at com.ibm._jsp._UnlayeredContainer_2D_H._jspx_meth_portal$1skin_layoutNodeRender_0(_UnlayeredContainer_2D_H.java:259)
	at com.ibm._jsp._UnlayeredContainer_2D_H._jspService(_UnlayeredContainer_2D_H.java:158)
	at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:93)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java(Compiled Code))
	at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:121)
	at com.ibm.ws.jsp.webcontainerext.JSPExtensionServletWrapper.handleRequest(JSPExtensionServletWrapper.java:215)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:670)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.handleRequest(DispatcherServiceImpl.java:87)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.include(DispatcherServiceImpl.java:52)
	at com.ibm.wps.services.dispatcher.Dispatcher.include(Dispatcher.java:45)
	at com.ibm.wps.engine.templates.skins.Default.render(Default.java:118)
	at com.ibm.wps.engine.templates.SkinTemplate.render(SkinTemplate.java:71)
	at com.ibm.wps.composition.elements.Component.render(Component.java:782)
	at com.ibm.wps.composition.Composition.render(Composition.java:2586)
	at com.ibm.websphere.personalization.transformation.PznTransformationLayoutModel.render(PznTransformationLayoutModel.java:70)
	at com.ibm.wps.model.wrappers.LayoutModelWrapperFactoryImpl$LayoutModelWrapperImpl.render(LayoutModelWrapperFactoryImpl.java:218)
	at com.ibm.wps.engine.tags2.PageRenderTag.doStartTag(PageRenderTag.java:396)
	at com.ibm._jsp._Home._jspService(_Home.java:82)
	at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:93)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java(Compiled Code))
	at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:121)
	at com.ibm.ws.jsp.webcontainerext.JSPExtensionServletWrapper.handleRequest(JSPExtensionServletWrapper.java:215)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:670)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.handleRequest(DispatcherServiceImpl.java:87)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.include(DispatcherServiceImpl.java:52)
	at com.ibm.wps.services.dispatcher.Dispatcher.include(Dispatcher.java:54)
	at com.ibm.wps.engine.templates.screens.Default.render(Default.java:91)
	at com.ibm.wps.engine.templates.ScreenTemplate.render(ScreenTemplate.java:61)
	at com.ibm.wps.engine.tags2.ScreenRenderTag.doStartTag(ScreenRenderTag.java:89)
	at com.ibm._jsp._Default._jspx_meth_portal$1core_screenRender_0(_Default.java:4292)
	at com.ibm._jsp._Default._jspService(_Default.java:2482)
	at com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:93)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java(Compiled Code))
	at com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:121)
	at com.ibm.ws.jsp.webcontainerext.JSPExtensionServletWrapper.handleRequest(JSPExtensionServletWrapper.java:215)
	at com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:670)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.handleRequest(DispatcherServiceImpl.java:87)
	at com.ibm.wps.services.dispatcher.DispatcherServiceImpl.include(DispatcherServiceImpl.java:52)
	at com.ibm.wps.services.dispatcher.Dispatcher.include(Dispatcher.java:45)
	at com.ibm.wps.engine.templates.themes.Default.doDispatch(Default.java:190)
	at com.ibm.wps.engine.templates.themes.Default.render(Default.java:152)
	at com.ibm.wps.engine.templates.ThemeTemplate.render(ThemeTemplate.java:67)
	at com.ibm.wps.engine.phases.WPRenderPhase.processRendering(WPRenderPhase.java:225)
	at com.ibm.wps.engine.phases.WPBaseRenderPhase.execute(WPBaseRenderPhase.java:159)
	at com.ibm.wps.state.phases.AbstractRenderPhase.next(AbstractRenderPhase.java:106)
	at com.ibm.wps.engine.phases.WPAbstractRenderPhase.next(WPAbstractRenderPhase.java:97)
	at com.ibm.wps.engine.Servlet.callPortal(Servlet.java:782)
	at com.ibm.wps.engine.Servlet.doGet(Servlet.java:620)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1521)
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.wps.state.filter.StateCleanup.doFilter(StateCleanup.java:86)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.wps.mappingurl.impl.URLAnalyzer.doFilter(URLAnalyzer.java:263)
	at com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java(Compiled Code))
	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:89)
	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1936)
	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:114)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:472)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:411)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:288)
	at com.ibm.ws.ssl.channel.impl.SSLConnectionLink.determineNextChannel(SSLConnectionLink.java:950)
	at com.ibm.ws.ssl.channel.impl.SSLConnectionLink$MyReadCompletedCallback.complete(SSLConnectionLink.java:582)
	at com.ibm.ws.ssl.channel.impl.SSLReadServiceContext$SSLReadCompletedCallback.complete(SSLReadServiceContext.java:1704)
	at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java(Compiled Code))
	at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java(Compiled Code))
	at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java(Compiled Code))
	at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java(Compiled Code))
	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java(Compiled Code))