null pointer error

[Former Member]

Hi I got a null pointer.

ihave the following code:

//@@begin executeY_Tf_Start_Process_Input()

Y_Tf_Start_Process_Input inputPS = new Y_Tf_Start_Process_Input();

inputPS.setScenario_Key(wdContext.currentYtf_MainprocessPLElement().getScenariokey());

inputPS.setPernr(wdContext.currentEmployee_ListELElement().getPernr());

inputPS.setCountry(wdContext.currentCountriesCLElement().getLand1());

inputPS.setMainprocesskey(wdContext.currentYtf_MainprocessPLElement().getMainprocesskey());

inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

wdContext.nodeY_Tf_Start_Process_Input().bind(inputPS);

try

{

wdContext.currentY_Tf_Start_Process_InputElement().modelObject().execute();

wdContext.nodeOutputPS().invalidate();

}

catch (Exception ex)

{

ex.printStackTrace();

}

//@@end

}

_____________

error message:

java.lang.NullPointerException

at com.shell.teamflow.wd.processstart.ProcessStart_Cust.executeY_Tf_Start_Process_Input(ProcessStart_Cust.java:220)

at com.shell.teamflow.wd.processstart.wdp.InternalProcessStart_Cust.executeY_Tf_Start_Process_Input(InternalProcessStart_Cust.java:395)

at com.shell.teamflow.wd.processstart.StartProcessView.onActionStartProcess(StartProcessView.java:177)

at com.shell.teamflow.wd.processstart.wdp.InternalStartProcessView.wdInvokeEventHandler(InternalStartProcessView.java:432)

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)

[Former Member · Accepted solution]

Hi

try this

try

{

if(wdContext.currentReasonsPRElement().getReason()!=null)

inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

}

catch(NullPointerException e)

{

inputPS.setReason("");

}

Regards,

Ajay

[Former Member · Accepted solution]

Ajay, this solved the problem. Thanks

[Former Member]

Hi

Doesn't this help you resolve your problem?

try

{

wdContext.currentReasonsPRElement().getReason()!=null)

inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

}

catch(NullPointerException e)

{

inputPS.setReason("");

}

Regards,

Ajay

[Former Member]

Ajay

i get an invalid expression statement with

wdContext.currentReasonsPRElement().getReason()!=null)

[Former Member]

Hi

Create other node (You can Change the cardinality here 1..n)and bind the bapi value to the node and bind it to the view.

You unable to check the null with cardinality 0..n when the value is null.

Kind Regards

Mukesh

[Former Member]

hi i am not creating any value node directly from view i trying to pass value to model node

is it possible or not

[Former Member]

Hi

I think you should check if you are getting the Reasons populated in the ReasonsPR node.If you are, then check if Reason is mandatory parameter.If it is then you have to pass the correct value to this parameter.

Anyway could you please post the stacktrace?

Regards,

Ajay

[Former Member]

if the reasons are in the back-end. they fill my table...

stacktrace?

I am rookie in java

[Former Member]

Hi

wdContext.currentReasonsPRElement().getReason() itself is giving Null pointer Exception.

Hence use the try catch block as per my previous post and the check.

Regards,

Ajay

[suresh_krishnamoorthy]

Still ur reponse from ReasonsPR is null...

try once like this:

if(wdContext.currentReasonsPRElement().getReason()!=null)

{

//tmp your getting null value check whether you mapped to response(ReasonsPR) and is getting value from bapi?

String tmp = "";

tmp = wdContext.currentReasonsPRElement().getReason();

if(tmp != "")

inputPS.setReason(tmp);

else

inputPS.setReason("");

}

else

inputPS.setReason("");

Regards

Suresh

[Former Member]

still nullpointer

___________________________

cardinality is o.n

Message was edited by: Eoin Cronan

[Former Member]

Hi

Try using

try

{

wdContext.currentReasonsPRElement().getReason()!=null)

inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

}

catch(NullPointerException e)

{

inputPS.setReason("");

}

Regards,

Ajay

[Former Member]

Hi

Are you sure that the element for the node ReasonsPR exists?If not then make sure that you have one by setting its cardinality to 1..n or by creating it.If you already have one then use try catch block for that code.

In catch block set the reason to "".

Regards,

Ajay

[Former Member]

cardinality is 1..n. it is directly from bapi.

what do you mean: with In catch block set the reason to "".

[suresh_krishnamoorthy]

Hi,

if(wdContext.currentReasonsPRElement().getReason()!=null)

{

//tmp your getting null value check whether you mapped to response(ReasonsPR) and is getting value from bapi?

String tmp = wdContext.currentReasonsPRElement().getReason();

if(tmp != null)

inputPS.setReason(tmp);

else

inputPS.setReason("");

}

else

inputPS.setReason("");

Regards

Suresh

[Former Member]

hi,

1.is the node ReasonsPR from BAPI?

2.try{

if((wdContext.currentReasonsPRElement().getReason()!=null){

inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

}else{

inputPS.setReason("");

}

}catch(Exception e){

inputPS.setReason("");

}

// do the Other

Kind Regards

Mukesh

[Former Member]

java.lang.NullPointerException

at com.shell.teamflow.wd.processstart.ProcessStart_Cust.executeY_Tf_Start_Process_Input(ProcessStart_Cust.java:221)

at com.shell.teamflow.wd.processstart.wdp.InternalProcessStart_Cust.executeY_Tf_Start_Process_Input(InternalProcessStart_Cust.java:395)

at com.shell.teamflow.wd.processstart.StartProcessView.onActionStartProcess(StartProcessView.java:177)

at com.shell.teamflow.wd.processstart.wdp.InternalStartProcessView.wdInvokeEventHandler(InternalStartProcessView.java:432)

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)

___________________________________________________

Y_Tf_Start_Process_Input inputPS = new Y_Tf_Start_Process_Input();

inputPS.setScenario_Key(wdContext.currentYtf_MainprocessPLElement().getScenariokey());

inputPS.setPernr(wdContext.currentEmployee_ListELElement().getPernr());

inputPS.setCountry(wdContext.currentCountriesCLElement().getLand1());

inputPS.setMainprocesskey(wdContext.currentYtf_MainprocessPLElement().getMainprocesskey());

if(wdContext.currentReasonsPRElement().getReason()!=null)

{

//tmp your getting null value check whether you mapped to response(ReasonsPR) and is getting value from bapi?

String tmp = wdContext.currentReasonsPRElement().getReason();

if(tmp != null)

inputPS.setReason(tmp);

else

inputPS.setReason("");

}

else

inputPS.setReason("");

// if(wdContext.currentReasonsPRElement().getReason()!=null)

// inputPS.setReason("");

// else

// inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

wdContext.nodeY_Tf_Start_Process_Input().bind(inputPS);

try

{

wdContext.currentY_Tf_Start_Process_InputElement().modelObject().execute();

wdContext.nodeOutputPS().invalidate();

}

catch (Exception ex)

{

ex.printStackTrace();

}

[Former Member]

yes it is from the bapi

if i use your code i get unresolved type and other messages. what do i need to replace?

[Former Member]

Hi,

Try this

Create other node (You can Change the cardinality here 1..n)and bind the bapi value to the node and bind it to the view.

You unable to check the null with cardinality 0..n when the value is null

//for binding the value from Bapi to dropdown

IPrivate<ViewName>.I<DropName>Node node = wdContext.node<DropName>();

int len=wdContext.node<BAPIList>().size();

for(int l=0;l<len;l++) {

String

returndata=String.valueOf(((IPrivate<viewname>.I<BAPIList>Element)(wdContext.node<BAPIList>(

).getElementAt(l))).get<Parameter>());

IPrivate<ViewName>.I<DropName>Element element =

wdContext.create<DropName>Element();

element.set<Param>(returndata);

node.addElement(element);

}

Kind Regards

Mukesh

[Former Member]

Hi

What is the line no. 221 in your ProcessStart_Cust.java.

It is causing this exception.Could you please post it?

Regards,

Ajay

[Former Member]

node property is 0.1

______________________________

Y_Tf_Start_Process_Input inputPS = new Y_Tf_Start_Process_Input();

inputPS.setScenario_Key(wdContext.currentYtf_MainprocessPLElement().getScenariokey());

inputPS.setPernr(wdContext.currentEmployee_ListELElement().getPernr());

inputPS.setCountry(wdContext.currentCountriesCLElement().getLand1());

inputPS.setMainprocesskey(wdContext.currentYtf_MainprocessPLElement().getMainprocesskey());

if

(wdContext.currentReasonsPRElement().getReason()!=null)

inputPS.setReason

<221>(wdContext.currentReasonsPRElement().getReason());

else

inputPS.setReason("");

wdContext.nodeY_Tf_Start_Process_Input().bind(inputPS);

try

{

wdContext.currentY_Tf_Start_Process_InputElement().modelObject().execute();

wdContext.nodeOutputPS().invalidate();

}

catch (Exception ex)

{

ex.printStackTrace();

}

Message was edited by: Eoin Cronan

[Former Member]

Hi

The error occurd at line number 220.

And check that element is not null which you have bind to that line.

Kind Regards

Mukesh

[Former Member]

your code is not saying if one of the attributes is null that this is also ok

[Former Member]

How can i do this?

Which code should I make then if one of these is null that he still needs go to bapi

[Former Member]

Hi

Check all the input is null then bind it to the BAPI Input

like

Y_Tf_Start_Process_Input inputPS = new Y_Tf_Start_Process_Input();

if(wdContext.currentYtf_MainprocessPLElement().getScenariokey()!=null){

inputPS.setScenario_Key(wdContext.currentYtf_MainprocessPLElement().getScenariokey());

}

if(wdContext.currentEmployee_ListELElement().getPernr()!=null){

inputPS.setPernr(wdContext.currentEmployee_ListELElement().getPernr());

}

if(wdContext.currentCountriesCLElement().getLand1()!=null){

inputPS.setCountry(wdContext.currentCountriesCLElement().getLand1());

}

if(wdContext.currentYtf_MainprocessPLElement().getMainprocesskey()!=null){

inputPS.setMainprocesskey(wdContext.currentYtf_MainprocessPLElement().getMainprocesskey());

}

if(wdContext.currentReasonsPRElement().getReason()!=null){

inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

}

//do the execute

Kind Regards

Mukesh.

[Former Member]

Bsome input can be null. which code should i put with it then

[suresh_krishnamoorthy]

Hi,

try like this..

if(wdContext.currentReasonsPRElement().getReason()!=null)

inputPS.setReason(wdContext.currentReasonsPRElement().getReason());

else

inputPS.setReason("");

Regards

Suresh

[Former Member]

Again I null pointer with this code

java.lang.NullPointerException

at com.shell.teamflow.wd.processstart.ProcessStart_Cust.executeY_Tf_Start_Process_Input(ProcessStart_Cust.java:221)

at com.shell.teamflow.wd.processstart.wdp.InternalProcessStart_Cust.executeY_Tf_Start_Process_Input(InternalProcessStart_Cust.java:395)

at com.shell.teamflow.wd.processstart.StartProcessView.onActionStartProcess(StartProcessView.java:177)

at com.shell.teamflow.wd.processstart.wdp.InternalStartProcessView.wdInvokeEventHandler(InternalStartProcessView.java:432)

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)

[Former Member]

Hi

If some can be empty means check the selection property of the node at line 221.The node should be have selection property 0..1 or 1..1.

Kind Regards

Mukesh

[Former Member]

Hi

It is occurring because you are accessing current<Node>Element of some node which actually does not exist.

The error is in line 220 of your ProcessStart_Cust.java.

Check if the node you are accessing in this line actually has the element.If not the create one or set the cardinality to 1..n.

Regards,

Ajay