on 04-22-2005 12:48 PM
Hi,
A very strange problem I am currently facing with Tree.
I have created a simple tree application.
The context for the view is as follows:
Context
|---Root <-- Value Node
|---FirstLevel <-- Value Node
| |---FirstLevelText <-- Value Attribute
|--Text <-- Value Attribute
From the above , it is clear that we have a Root as Value Node, Text as Value Attribute of Node Root.
In wdDoInit, this is the code I have attached.
public void wdDoInit()
{
//@@begin wdDoInit()
IPrivateMyTestTreeCompView.IRootNode rootNode = wdContext.nodeRoot();
IPrivateMyTestTreeCompView.IRootElement rootElement = rootNode.createRootElement();
rootElement.setText("My Root Node");
rootNode.addElement(rootElement);
IPrivateMyTestTreeCompView.IFirstLevelNode firstLevelNode = rootNode.nodeFirstLevel();
IPrivateMyTestTreeCompView.IFirstLevelElement firstLevelElement = firstLevelNode.createFirstLevelElement();
firstLevelElement.setFirstLevelText("First Level");
firstLevelNode.addElement(firstLevelElement);
//@@end
}
<b>Context Mapping</b>
In my view, I have only one UI Element, which is Tree. I have mapped it to Root of Context Element. I have created a NodeType of FirstLevelNode and mapped it to FirstLevel of Context. I have also correctly mapped the text property of the tree and its nodetype to the context value attributes.
<u><b>Error</b></u>
The root Node with the proper text i.e. My Root Node gets populated properly. However, the value First Level never comes up. Instead I have got this huge error log of NullPointerException in some TreeAdapter.java
I know this is some absolutely silly mistake, but I just can't figure it out. Please help.
I have done a sample Tree application based on the Tutorial available for Recursive Tree. It works great. I also looked at a Non-Recursive tutorial, but it just doesn't help.
Regards,
Subramanian V.
StackTrace attached below
Trees
My Root Node
-->An error has occurred:
"Failed to process the request."
Please contact your system administrator.
-
Hide details
Error stacktrace:
java.lang.NullPointerException
at com.sap.tc.webdynpro.clientimpl.html.uielib.standard.uradapter.TreeAdapter$Nodes.getIsClickable(TreeAdapter.java:1517)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.TreeRenderer.renderTreeNodeFragment(TreeRenderer.java:1829)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.TreeRenderer.renderTreeFragment(TreeRenderer.java:510)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.TreeRenderer.render(TreeRenderer.java:49)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:269)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:95)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.GridLayoutRenderer.renderGridLayoutCellFragment(GridLayoutRenderer.java:626)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.GridLayoutRenderer.renderGridLayoutRowFragment(GridLayoutRenderer.java:330)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.GridLayoutRenderer.renderGridLayoutFragment(GridLayoutRenderer.java:261)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.GridLayoutRenderer.render(GridLayoutRenderer.java:57)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:269)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:95)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.ScrollContainerRenderer.renderScrollContainerFragment(ScrollContainerRenderer.java:344)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.ie6.ScrollContainerRenderer.render(ScrollContainerRenderer.java:41)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:269)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:95)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.UiWindowRenderer.render(UiWindowRenderer.java:43)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:269)
at com.sap.tc.webdynpro.clientimpl.html.renderer.uielements.base.AbstractRenderManager.render(AbstractRenderManager.java:95)
at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.sendHtml(HtmlClient.java:522)
at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.sendResponse(HtmlClient.java:351)
at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.sendResponse(HtmlClient.java:249)
at com.sap.tc.webdynpro.clientimpl.html.client.HtmlClient.sendResponse(HtmlClient.java:204)
at com.sap.tc.webdynpro.clientserver.task.WebDynproMainTask.execute(WebDynproMainTask.java:669)
at com.sap.tc.webdynpro.clientserver.cal.AbstractClient.executeTasks(AbstractClient.java:59)
at com.sap.tc.webdynpro.clientserver.cal.ClientManager.doProcessing(ClientManager.java:249)
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.doGet(DispatcherServlet.java:48)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.runServlet(HttpHandlerImpl.java:385)
at com.sap.engine.services.servlets_jsp.server.HttpHandlerImpl.handleRequest(HttpHandlerImpl.java:263)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:340)
at com.sap.engine.services.httpserver.server.RequestAnalizer.startServlet(RequestAnalizer.java:318)
at com.sap.engine.services.httpserver.server.RequestAnalizer.invokeWebContainer(RequestAnalizer.java:821)
at com.sap.engine.services.httpserver.server.RequestAnalizer.handle(RequestAnalizer.java:239)
at com.sap.engine.services.httpserver.server.Client.handle(Client.java:92)
at com.sap.engine.services.httpserver.server.Processor.request(Processor.java:147)
at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)
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:94)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:162)
Message was edited by: Subramanian Venkateswaran
Check if all the compulsory properties have been given.
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I am able to construct a tree with recursive nodes. However, in non-recursive nodes, I have no idea, why it is so difficult !
Always gives me the NullPointerException error.
Can you just brief which compulsory properties are given, since I am of the impression that, if I don't give them, I will get an error. However, I at least get the root Node, but never its children.
Regards,
Subramanian V.
Hi
Which version are you using. In SP10 your scenario works fine. Of course to achieve a Node within a Node you will have to write some more logic. But regarding the Null pointer exception , it doesnt seem to happen in SP10 and SP11. It gives a clean output with Root Node and below that a value attribute with name "First Level Text"
Your coding is fine. Maybe the version there is a problem.
regards
ravi
I had similar problem and in my circumstance it was due to the fact that i haven't initially added 'NodeType' to tree.
Regards,
Marcin Zduniak
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