NPE when expanding tree table

Question

Dear All,
I have a treetable in my page, and a button that inserts some rows in master detail hiearchy based on some busniess logic.
And here is my method that expands my tree table which gets called on button click event.
    private void expandAllNodes(){
        org.apache.myfaces.trinidad.model.RowKeySet disclosedTreeRowKeySet = new RowKeySetImpl();
        ViewObject iterCust = u.findIterator("IncDetSubmenuCust_VO1Iterator").getViewObject();
        ViewObject iterType = u.findIterator("IncDetSubmenuType_VO1Iterator").getViewObject();
        ViewObject iterSubmenu = u.findIterator("IncomeDetailSubmenus_VO1Iterator").getViewObject();
        ArrayList<Key> submenuList = new ArrayList<Key>();
        for(Row rowCust=iterCust.first(); rowCust!=null; rowCust=iterCust.next()){
            ArrayList<Key> custList = new ArrayList<Key>();
            custList.add(rowCust.getKey());
            if(iterType.getEstimatedRowCount()>0)
            disclosedTreeRowKeySet.add(custList);
            for(Row rowType=iterType.first(); rowType!=null; rowType=iterType.next()){
                ArrayList<Key> typeList = new ArrayList<Key>();
                typeList.addAll(custList);
                typeList.add(rowType.getKey());
                if(iterSubmenu.getEstimatedRowCount()>0)
                disclosedTreeRowKeySet.add(typeList);
                for(Row rowSubmenu=iterSubmenu.first(); rowSubmenu!=null; rowSubmenu=iterSubmenu.next()){
                    submenuList.add(rowSubmenu.getKey());
        //disclosedTreeRowKeySet.add(submenuList);
        if(treeTableSubmenus !=null)
        treeTableSubmenus.setDisclosedRowKeys(disclosedTreeRowKeySet);
            u.addPartialTargets(treeTableSubmenus);
    }Now when i click the button first time the treetable expands perfectly shows some new master detail hiearchy,
Then when i click the button second time(busniess logic cond chnged, inserted some new rows in master detail hiearchy) and call this method it gives ,me NPE as following stacktrace.
<UIXRegion> <_warn> Error processing viewId: /credit_appraisal_tf/credit_appraisal_pf URI: /applicationdetail/credit_appraisal/credit_appraisal_pf.jsff actual-URI: /applicationdetail/credit_appraisal/credit_appraisal_pf.jsff.
java.lang.NullPointerException
     at oracle.adfinternal.view.faces.model.binding.RowDataManager.setRowKey(RowDataManager.java:139)
     at oracle.adfinternal.view.faces.model.binding.FacesCtrlHierBinding$FacesModel.setRowKey(FacesCtrlHierBinding.java:633)
     at oracle.adfinternal.view.faces.model.FlattenedTreeCollectionModel.setPath(FlattenedTreeCollectionModel.java:342)
     at oracle.adfinternal.view.faces.model.FlattenedTreeCollectionModel.setRowKey(FlattenedTreeCollectionModel.java:303)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeRendererUtils.initModel(TreeRendererUtils.java:303)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeRendererUtils.wrapModel(TreeRendererUtils.java:545)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeRendererUtils.getCollectionObject(TreeRendererUtils.java:345)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeTableRenderer.getCollectionObject(TreeTableRenderer.java:762)
     at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer.storeHeightAutosized(TableRenderer.java:2366)
     at oracle.adfinternal.view.faces.renderkit.rich.TableRenderer.encodeAll(TableRenderer.java:537)
     at oracle.adfinternal.view.faces.renderkit.rich.TreeTableRenderer.encodeAll(TreeTableRenderer.java:600)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1396)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:767)
     at org.apache.myfaces.trinidad.component.UIXCollection.encodeEnd(UIXCollection.java:538)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:937)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:399)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2633)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer._encodeChild(PanelGroupLayoutRenderer.java:432)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.access$300(PanelGroupLayoutRenderer.java:30)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:682)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:601)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:170)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:290)
     at org.apache.myfaces.trinidad.component.UIXComponent.encodeFlattenedChildren(UIXComponent.java:255)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.encodeAll(PanelGroupLayoutRenderer.java:358)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1396)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:767)
     at javax.faces.component.UIComponent.encodeAll(UIComponent.java:937)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeChild(CoreRenderer.java:399)
     at oracle.adf.view.rich.render.RichRenderer.encodeChild(RichRenderer.java:2633)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer._encodeChild(PanelGroupLayoutRenderer.java:432)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.access$300(PanelGroupLayoutRenderer.java:30)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:682)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer$EncoderCallback.processComponent(PanelGroupLayoutRenderer.java:601)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:170)
     at org.apache.myfaces.trinidad.component.UIXComponent.processFlattenedChildren(UIXComponent.java:290)
     at org.apache.myfaces.trinidad.component.UIXComponent.encodeFlattenedChildren(UIXComponent.java:255)
     at oracle.adfinternal.view.faces.renderkit.rich.PanelGroupLayoutRenderer.encodeAll(PanelGroupLayoutRenderer.java:358)
     at oracle.adf.view.rich.render.RichRenderer.encodeAll(RichRenderer.java:1396)
     at org.apache.myfaces.trinidad.render.CoreRenderer.encodeEnd(CoreRenderer.java:335)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:767)
.Any pointers..?
Thanks ,
Santosh.
j 11.1.1.5.0

Answer 1

Hi Sireesha,
thanks.
You should have got few more exceptions stating line number at which the exception has raised, can you check your log?Yes i checked my log.. the exceptions is not raised from my code, its from adf internal lib.
And it is very difficult trace out the problem without knowing much details on the insertion logic and the relationship of your iterators.
Can you put more details.Sure
IncDetSubmenuCust_VO1
  with (1-*)
IncDetSubmenuType_VO1
  with(1-*)
IncomeDetailSubmenus_VO1basically i am inserting the records in IncDetSubmenuType_VO1 & IncomeDetailSubmenus_VO1 only..
on second attempt its giving me NPE.. as shown in my previous post.
I am inserting the records and then calling my expandAll() method.
As seen in logs, the NPE is not raised from my code. Seems like some ADF bug or something...
Thanks,
Santosh.