Mobile enable portlet

Hi !
I need your help if you can help me. I have a portlet done in jdeveloper retrieving student information and i want to convert it be mobile enabled portlet so as student can view with their mobile. I deploy to portal builder but seems like i keep having an error in mobile preview mode in portal builder
Portal Builder: Error: The XML parser encountered an Error, and could not complete the conversion for portlet id=174,135842, it returned the following message: {1}
JDEV error: The XML page cannot be displayed
Cannot view XML input using XSL style sheet. Please correct the error and then click the Refresh button, or try again later.
Whitespace is not allowed at this location. Error processing resource 'file:///C:/Documents and Settings/FELICIAT/Desktop/M...
<STUDCOURSE>Diploma In Electronics, Computer & Communications Engineering</STUDCOURSE>
I think is because of the '&' symbol, do anyone of you know how to let XML read the '&' symbol so it can display on mobile preview mode in Oracle Portal Builder while retrieving data from database ?
Thank you in advance!!
Fel

Thanks Yannick for quick response, so on this my next doubt is can we create
1.     Standard JSR 286 Portlet
2.     PDK-Java Portlet
via Jdeveloper, and it may render inline without iFrame? Should I give a try on this.
Thanks
Ankur

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         at oracle.oc4j.network.ServerSocketReadHandler$ClientRunnable.run(ServerSocketReadHandler.java:275)
         at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:237)
         at oracle.oc4j.network.ServerSocketAcceptHandler.access$800(ServerSocketAcceptHandler.java:29)
         at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:877)
         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
         at java.lang.Thread.run(Thread.java:595)
    Caused by: java.lang.ClassCastException: oracle.portlet.server.containerimpl.ActionResponseImpl
         at view.util.FileOperations.downloadFile(FileOperations.java:47)
         at view.backing.SearchLocationBCDR.downloadActionListener(SearchLocationBCDR.java:292)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
         at java.lang.reflect.Method.invoke(Method.java:585)
         at com.sun.el.parser.AstValue.invoke(AstValue.java:151)
         at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283)
         at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:53)
         ... 52 more
    08/02/12 14:42:07 WARNING: An internal error has occurred in method performBlockingInteraction
    javax.portlet.PortletException: doBridgeDispatch failed: error from Bridge in executing the request
         at javax.portlet.faces.GenericFacesPortlet.doBridgeDispatch(GenericFacesPortlet.java:284)
         at javax.portlet.faces.GenericFacesPortlet.processAction(GenericFacesPortlet.java:191)
         at oracle.portlet.bridge.adf.application.ADFBridgePortlet.processAction(ADFBridgePortlet.java:238)
         at oracle.portlet.server.containerimpl.ServerImpl.doRuntimeCall(ServerImpl.java:1296)
         at oracle.portlet.server.containerimpl.ServerImpl.performBlockingInteraction(ServerImpl.java:210)
         at oracle.portlet.wsrp.v2.WSRPv2VersionWrapperServer.performBlockingInteraction(WSRPv2VersionWrapperServer.java:481)
         at oracle.portlet.wsrp.v2.WSRPv2ToServer.performBlockingInteraction(WSRPv2ToServer.java:3141)
         at oracle.portlet.wsrp.v2.WSRP_v2_Markup_PortTypeSoapToJaxb.performBlockingInteraction(WSRP_v2_Markup_PortTypeSoapToJaxb.java:624)
         at oasis.names.tc.wsrp.v2.bind.runtime.WSRP_v2_Markup_Binding_SOAP_Tie.invoke_performBlockingInteraction(WSRP_v2_Markup_Binding_SOAP_Tie.java:314)
         at oasis.names.tc.wsrp.v2.bind.runtime.WSRP_v2_Markup_Binding_SOAP_Tie.processingHook(WSRP_v2_Markup_Binding_SOAP_Tie.java:1443)
         at oracle.j2ee.ws.server.StreamingHandler.handle(StreamingHandler.java:298)
         at oracle.j2ee.ws.server.JAXRPCProcessor.doEndpointProcessing(JAXRPCProcessor.java:428)
         at oracle.j2ee.ws.server.WebServiceProcessor.invokeEndpointImplementation(WebServiceProcessor.java:540)
         at oracle.j2ee.ws.server.JAXRPCProcessor.doRequestProcessing(JAXRPCProcessor.java:292)
         at oracle.j2ee.ws.server.WebServiceProcessor.processRequest(WebServiceProcessor.java:198)
         at oracle.j2ee.ws.server.JAXRPCProcessor.doService(JAXRPCProcessor.java:149)
         at oracle.j2ee.ws.server.WebServiceServlet.doPost(WebServiceServlet.java:307)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
         at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
         at oracle.portlet.server.service.ContextFilter.doFilter(ContextFilter.java:101)
         at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:15)
         at oracle.security.jazn.oc4j.JAZNFilter$3.run(JAZNFilter.java:434)
         at java.security.AccessController.doPrivileged(Native Method)
         at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:308)
         at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:452)
         at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:583)
         at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:334)
         at com.evermind.server.http.HttpRequestHandler.doDispatchRequest(HttpRequestHandler.java:942)
         at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:843)
         at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:646)
         at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:614)
         at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:405)
         at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:168)
         at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:149)
         at oracle.oc4j.network.ServerSocketReadHandler$ClientRunnable.run(ServerSocketReadHandler.java:275)
         at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:237)
         at oracle.oc4j.network.ServerSocketAcceptHandler.access$800(ServerSocketAcceptHandler.java:29)
         at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:877)
         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
         at java.lang.Thread.run(Thread.java:595)
    Caused by: javax.portlet.faces.BridgeException: java.lang.ClassCastException: oracle.portlet.server.containerimpl.ActionResponseImpl
         at org.apache.myfaces.portlet.faces.bridge.BridgeImpl.doFacesRequest(BridgeImpl.java:267)
         at javax.portlet.faces.GenericFacesPortlet.doBridgeDispatch(GenericFacesPortlet.java:280)
         ... 41 more
    Caused by: java.lang.ClassCastException: oracle.portlet.server.containerimpl.ActionResponseImpl
         at view.util.FileOperations.downloadFile(FileOperations.java:47)
         at view.backing.SearchLocationBCDR.downloadActionListener(SearchLocationBCDR.java:292)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
         at java.lang.reflect.Method.invoke(Method.java:585)
         at com.sun.el.parser.AstValue.invoke(AstValue.java:151)
         at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283)
         at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:53)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodBinding(UIXComponentBase.java:1212)
         at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:183)
         at org.apache.myfaces.trinidad.component.UIXCollection.broadcast(UIXCollection.java:147)
         at org.apache.myfaces.trinidad.component.UIXTable.broadcast(UIXTable.java:205)
         at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447)
         at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
         at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._invokeApplication(LifecycleImpl.java:621)
         at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:276)
         at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:176)
         at org.apache.myfaces.portlet.faces.bridge.BridgeImpl.doFacesRequest(BridgeImpl.java:218)
         ... 42 more
    Nested Exception is javax.portlet.faces.BridgeException: java.lang.ClassCastException: oracle.portlet.server.containerimpl.ActionResponseImpl
         at org.apache.myfaces.portlet.faces.bridge.BridgeImpl.doFacesRequest(BridgeImpl.java:267)
         at javax.portlet.faces.GenericFacesPortlet.doBridgeDispatch(GenericFacesPortlet.java:280)
         at javax.portlet.faces.GenericFacesPortlet.processAction(GenericFacesPortlet.java:191)
         at oracle.portlet.bridge.adf.application.ADFBridgePortlet.processAction(ADFBridgePortlet.java:238)
         at oracle.portlet.server.containerimpl.ServerImpl.doRuntimeCall(ServerImpl.java:1296)
         at oracle.portlet.server.containerimpl.ServerImpl.performBlockingInteraction(ServerImpl.java:210)
         at oracle.portlet.wsrp.v2.WSRPv2VersionWrapperServer.performBlockingInteraction(WSRPv2VersionWrapperServer.java:481)
         at oracle.portlet.wsrp.v2.WSRPv2ToServer.performBlockingInteraction(WSRPv2ToServer.java:3141)
         at oracle.portlet.wsrp.v2.WSRP_v2_Markup_PortTypeSoapToJaxb.performBlockingInteraction(WSRP_v2_Markup_PortTypeSoapToJaxb.java:624)
         at oasis.names.tc.wsrp.v2.bind.runtime.WSRP_v2_Markup_Binding_SOAP_Tie.invoke_performBlockingInteraction(WSRP_v2_Markup_Binding_SOAP_Tie.java:314)
         at oasis.names.tc.wsrp.v2.bind.runtime.WSRP_v2_Markup_Binding_SOAP_Tie.processingHook(WSRP_v2_Markup_Binding_SOAP_Tie.java:1443)
         at oracle.j2ee.ws.server.StreamingHandler.handle(StreamingHandler.java:298)
         at oracle.j2ee.ws.server.JAXRPCProcessor.doEndpointProcessing(JAXRPCProcessor.java:428)
         at oracle.j2ee.ws.server.WebServiceProcessor.invokeEndpointImplementation(WebServiceProcessor.java:540)
         at oracle.j2ee.ws.server.JAXRPCProcessor.doRequestProcessing(JAXRPCProcessor.java:292)
         at oracle.j2ee.ws.server.WebServiceProcessor.processRequest(WebServiceProcessor.java:198)
         at oracle.j2ee.ws.server.JAXRPCProcessor.doService(JAXRPCProcessor.java:149)
         at oracle.j2ee.ws.server.WebServiceServlet.doPost(WebServiceServlet.java:307)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
         at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
         at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterChain.java:65)
         at oracle.portlet.server.service.ContextFilter.doFilter(ContextFilter.java:101)
         at com.evermind.server.http.EvermindFilterChain.doFilter(EvermindFilterChain.java:15)
         at oracle.security.jazn.oc4j.JAZNFilter$3.run(JAZNFilter.java:434)
         at java.security.AccessController.doPrivileged(Native Method)
         at oracle.security.jps.util.JpsSubject.doAsPrivileged(JpsSubject.java:308)
         at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:452)
         at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:583)
         at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:334)
         at com.evermind.server.http.HttpRequestHandler.doDispatchRequest(HttpRequestHandler.java:942)
         at com.evermind.server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:843)
         at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:646)
         at com.evermind.server.http.HttpRequestHandler.processRequest(HttpRequestHandler.java:614)
         at com.evermind.server.http.HttpRequestHandler.serveOneRequest(HttpRequestHandler.java:405)
         at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:168)
         at com.evermind.server.http.HttpRequestHandler.run(HttpRequestHandler.java:149)
         at oracle.oc4j.network.ServerSocketReadHandler$ClientRunnable.run(ServerSocketReadHandler.java:275)
         at oracle.oc4j.network.ServerSocketAcceptHandler.procClientSocket(ServerSocketAcceptHandler.java:237)
         at oracle.oc4j.network.ServerSocketAcceptHandler.access$800(ServerSocketAcceptHandler.java:29)
         at oracle.oc4j.network.ServerSocketAcceptHandler$AcceptHandlerHorse.run(ServerSocketAcceptHandler.java:877)
         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
         at java.lang.Thread.run(Thread.java:595)
    Caused by: java.lang.ClassCastException: oracle.portlet.server.containerimpl.ActionResponseImpl
         at view.util.FileOperations.downloadFile(FileOperations.java:47)
         at view.backing.SearchLocationBCDR.downloadActionListener(SearchLocationBCDR.java:292)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
         at java.lang.reflect.Method.invoke(Method.java:585)
         at com.sun.el.parser.AstValue.invoke(AstValue.java:151)
         at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:283)
         at org.apache.myfaces.trinidadinternal.taglib.util.MethodExpressionMethodBinding.invoke(MethodExpressionMethodBinding.java:53)
         at org.apache.myfaces.trinidad.component.UIXComponentBase.broadcastToMethodBinding(UIXComponentBase.java:1212)
         at org.apache.myfaces.trinidad.component.UIXCommand.broadcast(UIXCommand.java:183)
         at org.apache.myfaces.trinidad.component.UIXCollection.broadcast(UIXCollection.java:147)
         at org.apache.myfaces.trinidad.component.UIXTable.broadcast(UIXTable.java:205)
         at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:447)
         at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:752)
         at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._invokeApplication(LifecycleImpl.java:621)
         at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl._executePhase(LifecycleImpl.java:276)
         at oracle.adfinternal.view.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:176)
         at org.apache.myfaces.portlet.faces.bridge.BridgeImpl.doFacesRequest(BridgeImpl.java:218)
         ... 42 more

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