Solved: no such element inroadmap exception error

Former Member · ‎09-19-2006

Hi,

I have created an roadmap project. The navigation is working. except when i need to skipp a stip.

When i for instance pus a back putton the roadmap shows me that i am at step 2 instead of step 1`

The code i am using in te viewcontroller for the back button:

wdThis.wdGetOm_Webforms_CustController().visibleSelectionContainer();

wdThis.wdGetOm_Webforms_CustController().InvisibleRequestDetailsContainer();

wdThis.wdGetOm_Webforms_CustController().PreviousStep();

code in the custom controller:

String attrName = null;

boolean found = false;

//copy iterator into list to get list iterator

Iterator it = wdContext.nodeRoadMapSteps().getNodeInfo().iterateAttributes();

List steps = new ArrayList();

while (it.hasNext()) {

steps.add(it.next());

}

ListIterator lit = steps.listIterator();

// find current element and deselect it

while (lit.hasNext() && !found) {

//get attribute name

IWDAttributeInfo info = (IWDAttributeInfo) lit.next();

attrName = info.getName();

if (WDRoadMapStepDesign.SELECTED.equals(wdContext.currentRoadMapStepsElement().getAttributeValue(attrName))){

//selected element found

wdContext.currentRoadMapStepsElement().setAttributeValue(attrName, WDRoadMapStepDesign.STANDARD);

found = true;

}

found = false;

lit.previous(); // correction

// one step backwards, but skip disabled steps

while(lit.hasPrevious() && !found) {

//get attribute name

IWDAttributeInfo info = (IWDAttributeInfo) lit.previous();

attrName = info.getName();

if (!WDRoadMapStepDesign.DISABLED.equals(wdContext.currentRoadMapStepsElement().getAttributeValue(attrName))) {

// element is not disabled => select it

wdContext.currentRoadMapStepsElement().setAttributeValue(attrName, WDRoadMapStepDesign.SELECTED);

found = true;

}

Former Member · ‎09-19-2006

what kind of methods did you make?

Former Member · ‎09-20-2006

I get a nulpointer exception when i am going to te next step

code i used for next step

int currentIndex = wdContext.currentRoadMapElement().getSelectedStepIndex();

if (currentIndex < 2) {

wdContext.currentRoadMapElement().setSelectedStepIndex(

currentIndex + 1);

erroro message

java.lang.NullPointerException

at com.shell.teamflow.wd.omwebforms.Om_Webforms_Cust.NextStep(Om_Webforms_Cust.java:284)

at com.shell.teamflow.wd.omwebforms.wdp.InternalOm_Webforms_Cust.NextStep(InternalOm_Webforms_Cust.java:205)

at com.shell.teamflow.wd.omwebforms.RequestType_View.onActionCreatePosition(RequestType_View.java:227)

at com.shell.teamflow.wd.omwebforms.wdp.InternalRequestType_View.wdInvokeEventHandler(InternalRequestType_View.java:215)

at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(DelegatingView.java:87)

at com.sap.tc.webdynpro.progmodel.controller.Action.fire(Action.java:67)

at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleAction(WebDynproMainTask.java:101)

at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.handleActionEvent(WebDynproMainTask.java:304)

at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:649)

at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)

at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:248)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doWebDynproProcessing(DispatcherServlet.java:154)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doContent(DispatcherServlet.java:116)

at com.sap.tc.webdynpro.serverimpl.defaultimpl.DispatcherServlet.doPost(DispatcherServlet.java:55)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:390)

at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:264)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:347)

at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:325)

at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:887)

at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:241)

at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92)

at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:148)

at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:33)

at com.sap.engine.core.cluster.impl6.session.MessageRunner.run(MessageRunner.java:41)

at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)

at java.security.AccessController.doPrivileged(Native Method)

at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:95)

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:160)

Former Member · ‎09-20-2006

code in there is following

// create new steps node element

IRoadMapStepsElement steps = wdContext.nodeRoadMapSteps().createRoadMapStepsElement();

// iterate through node attributes and initialize them

IWDNodeInfo nodeInfo = wdContext.nodeRoadMapSteps().getNodeInfo();

Iterator it = nodeInfo.iterateAttributes();

boolean first = true;

while (it.hasNext()) {

//get attribute name

IWDAttributeInfo info = (IWDAttributeInfo) it.next();

String attrName = info.getName();

// initialize context value

if (first) {

// first step in RoadMap => set to SELECTED

steps.setAttributeValue(attrName, WDRoadMapStepDesign.SELECTED);

first = false;

} else {

// all other steps set to STANDARD

steps.setAttributeValue(attrName, WDRoadMapStepDesign.STANDARD);

}

wdContext.nodeRoadMapSteps().bind(steps);

Former Member · ‎09-19-2006

Your code looks strange to me. You are working with context metadata instead of context data. Why?

To control the selection of a RoadMap, you simply have to provide a context attribute that stores the ID of the currently selected step.

Say you have 3 steps with IDs "step0", "step1", "step2".

Create context attribute "SelectedStep" of type "string" and bind property RoadMap.<b>selectedStep </b>to that attribute.

If you want to do "step arithmetic", you could create a context attribute "SelectedStepIndex" of type "integer" and make "SelectedStep" a calculated attribute with

String getSelectedStep(IWDNodeElement element)
{
  return "step" + wdContext.currentContextElement().getSelectedStepIndex();
}

Then you can navigate through the steps by the following operations:

- Goto step "step<i>":

wdContext.currentContextElement().setSelectedStepIndex(i)

- Goto next step:

int currentIndex = wdContext.currentContextElement().getSelectedStepIndex();
if (currentIndex < 2)
{
  wdContext.currentContextElement().setSelectedStepIndex(currentIndex + 1);
}

- Goto previous step:

int currentIndex = wdContext.currentContextElement().getSelectedStepIndex();
if (currentIndex > 0)
{
  wdContext.currentContextElement().setSelectedStepIndex(currentIndex - 1);
}

Armin

no such element inroadmap exception error

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