Hi Andrew,
My problem of dispaying the tree is solved.
As per your last reply I can adopt two different approach
1) on-load functionality or Managed bean based (when the page will be load)
the treetable bean's treedata method will called and treenode will
begenerated and displayed.
2) action based : where I am calling an action and setting the treebean into
the request and when JSP page is loaded I am just fetching the bean from the
request(which is already created in the action.)
I have choosen Action based approach bcas I need to display some more data
on the same page along with the tree. On change of the listbox I need to
fire some method calls.
So to make all the logic centralised I choosed action based approach.
I am attaching the screenshot of the page.
If you have any better idea pls let me know.
Novin
Andrew Robinson-5 wrote:
>
> I'm not sure what you are asking. Are you having a problem with
> displaying the tree before an action method is called?
>
> The bean will be created first time it is evaluated by the EL engine.
> What is your application flow (for example, are you navigating to the
> page with the tree with an action)?
>
> If the user can just "happen" upon the page (bookmark, link, etc),
> then you may want an on-load functionality rather than an action based
> functionality to load the tree model. You can also create the tree
> model from inside the get property method.
>
> See if you can send us some more information then perhaps I can give
> you better advise.
>
> -Andrew
>
> On 6/28/07, Novin <[EMAIL PROTECTED]> wrote:
>>
>> Hi Andrew,
>>
>> Thanks for your help.
>>
>> You are right the problem is with the treedata. It was null and while
>>
>> <t:tree2 id="clientTree" value="#{accountTreeBean.treeData}"
>>
>> accountTreeBean.treeData method was throwing nullpointer exception. Bcas
>> I
>> was not setting the the accountTreeBean in request which now I am doing
>> explicitly in one of my action class which take cares of tree creation by
>> calling accountTreeBean.createTree().
>>
>>
>> And my managed bean "accountTreeBean" entry will not make any difference
>> bcas I m calling action class method to bring that tree.
>>
>> <managed-bean>
>> <managed-bean-name>accountTreeBean</managed-bean-name>
>>
>> <managed-bean-class>com.ml.ffogo.csin.web.beans.AccountTreeBean</managed-bean-class>
>> <managed-bean-scope>request</managed-bean-scope>
>> </managed-bean>
>>
>>
>> Hope you understand my problem and thanks alot for your valuable time.
>>
>> Regards,
>> Novin
>>
>>
>>
>> Andrew Robinson-5 wrote:
>> >
>> > I don't think this is the problem, but I don't think you want the
>> > a4j:region outside of the form.
>> >
>> > As for the exception, that would occur if the tree data model is null.
>> > Here is the line:
>> >
>> > TreeState state = getDataModel().getTreeState();
>> >
>> > On 6/27/07, Novin <[EMAIL PROTECTED]> wrote:
>> >>
>> >> Hi freinds,
>> >>
>> >> I have implemented tamhalk tree2, Initially it was working fine but
>> now
>> >> It
>> >> is throwing nullpointer when treis to render the tree.
>> >>
>> >> Pls help me. here is the JSP page code for the tree to be displayed
>> and
>> >> stack trace of the exception.
>> >>
>> >> Does any one have any idea?
>> >>
>> >> Here is the faces config file.
>> >> http://www.nabble.com/file/p11330136/faces-config.xml faces-config.xml
>> >>
>> >>
>> >> Thanks and Regards,
>> >> Novin Jaiswal
>> >>
>> >> <f:subview id="accounttreesubview">
>> >> <a4j:region>
>> >> <a4j:outputPanel ajaxRendered="true">
>> >> <h:messages/>
>> >> </a4j:outputPanel>
>> >> <h:form id="frmAccountGrpupUpdate">
>> >> <a4j:outputPanel
>> >> id="accountTreePanel">
>> >> <t:tree2 id="clientTree"
>> >> value="#{accountTreeBean.treeData}"
>> >> var="node" varNodeToggler="t" >
>> >> <f:facet name="person"
>> >
>> >> <h:panelGroup
>> >> id="grp1">
>> >> <h:outputText
>> >> value="#{node.description}" id="temp3"/>
>> >> </h:panelGroup>
>> >> </f:facet>
>> >>
>> >> <f:facet
>> >> name="foo-folder">
>> >> <h:panelGroup
>> >> id="grp2">
>> >> <h:outputText
>> >> value="#{node.description}" id="temp7"/>
>> >> </h:panelGroup>
>> >> </f:facet>
>> >>
>> >> <f:facet
>> name="document">
>> >> <h:panelGroup
>> >> id="grp3">
>> >>
>> <h:outputText
>> >> value="#{node.description}"
>> >> id="temp11"/>
>> >> </h:panelGroup>
>> >> </f:facet>
>> >> </t:tree2>
>> >> </a4j:outputPanel>
>> >> </h:form>
>> >> </a4j:region>
>> >> </f:subview>
>> >>
>> >>
>> >>
>> >> SRVE0068E: Uncaught exception thrown in one of the service methods of
>> >> the
>> >> servlet: /pages/csin/tiles/account/accountTree.jsp. Exception thrown :
>> >> java.lang.NullPointerException
>> >> at
>> >>
>> org.apache.myfaces.custom.tree2.UITreeData.encodeEnd(UITreeData.java:120)
>> >> at
>> >>
>> org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:286)
>> >> at
>> >>
>> org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262)
>> >> at
>> >>
>> org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRenderer.java:79)
>> >> at
>> >>
>> javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:735)
>> >> at
>> >>
>> org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:282)
>> >> at
>> >>
>> org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262)
>> >> at
>> >>
>> org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:284)
>> >> at
>> >>
>> org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262)
>> >> at
>> >>
>> org.ajax4jsf.framework.renderer.AjaxContainerRenderer.encodeChildren(AjaxContainerRenderer.java:100)
>> >> at
>> >>
>> javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:735)
>> >> at
>> >> org.ajax4jsf.ajax.UIAjaxRegion.encodeChildren(UIAjaxRegion.java:117)
>> >> at
>> >>
>> javax.faces.webapp.UIComponentTag.encodeChildren(UIComponentTag.java:611)
>> >> at
>> >> javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:548)
>> >> at
>> >>
>> com.ibm._jsp._accountTree._jspx_meth_a4j_region_0(_accountTree.java:448)
>> >> at
>> >>
>> com.ibm._jsp._accountTree._jspx_meth_f_subview_0(_accountTree.java:468)
>> >> at com.ibm._jsp._accountTree._jspService(_accountTree.java:93)
>> >> at
>> >> com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:85)
>> >> at
>> javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:907)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:701)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:646)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:475)
>> >> at
>> >>
>> com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
>> >> at
>> >>
>> com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:115)
>> >> at
>> >>
>> com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:168)
>> >> at
>> >>
>> com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionProcessor.handleRequest(AbstractJSPExtensionProcessor.java:270)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.include(WebAppRequestDispatcher.java:606)
>> >> at
>> >>
>> org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:1034)
>> >> at
>> >>
>> org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:484)
>> >> at
>> >>
>> org.apache.struts.tiles.TilesUtilImpl.doInclude(TilesUtilImpl.java:137)
>> >> at
>> >> org.apache.struts.tiles.TilesUtil.doInclude(TilesUtil.java:177)
>> >> at
>> >> org.apache.struts.taglib.tiles.InsertTag.doInclude(InsertTag.java:756)
>> >> at
>> >>
>> org.apache.struts.taglib.tiles.InsertTag$InsertHandler.doEndTag(InsertTag.java:881)
>> >> at
>> >> org.apache.struts.taglib.tiles.InsertTag.doEndTag(InsertTag.java:473)
>> >> at
>> >>
>> com.ibm._jsp._commonLayout._jspx_meth_tiles_insert_3(_commonLayout.java:212)
>> >> at
>> >> com.ibm._jsp._commonLayout._jspx_meth_f_view_0(_commonLayout.java:264)
>> >> at
>> com.ibm._jsp._commonLayout._jspService(_commonLayout.java:131)
>> >> at
>> >> com.ibm.ws.jsp.runtime.HttpJspBase.service(HttpJspBase.java:85)
>> >> at
>> javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:907)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:118)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:701)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:646)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:475)
>> >> at
>> >>
>> com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
>> >> at
>> >>
>> com.ibm.wsspi.webcontainer.servlet.GenericServletWrapper.handleRequest(GenericServletWrapper.java:115)
>> >> at
>> >>
>> com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:168)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:308)
>> >> at
>> >>
>> com.sun.faces.context.ExternalContextImpl.dispatch(ExternalContextImpl.java:325)
>> >> at
>> >>
>> org.apache.myfaces.tomahawk.application.jsp.JspTilesViewHandlerImpl.dispatch(JspTilesViewHandlerImpl.java:236)
>> >> at
>> >>
>> org.apache.myfaces.tomahawk.application.jsp.JspTilesViewHandlerImpl.renderView(JspTilesViewHandlerImpl.java:222)
>> >> at
>> >>
>> org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
>> >> at
>> >>
>> org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:233)
>> >> at
>> >>
>> com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:87)
>> >> at
>> >> com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:220)
>> >> at
>> >> com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:118)
>> >> at
>> javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:966)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:907)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:145)
>> >> at
>> >>
>> org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127)
>> >> at
>> >>
>> org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
>> >> at
>> >>
>> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.FilterInstanceWrapper.doFilter(FilterInstanceWrapper.java:190)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain.doFilter(WebAppFilterChain.java:130)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterChain._doFilter(WebAppFilterChain.java:87)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:701)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.filter.WebAppFilterManager.doFilter(WebAppFilterManager.java:646)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:475)
>> >> at
>> >>
>> com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:463)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:92)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:744)
>> >> at
>> >>
>> com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
>> >> at
>> >>
>> com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:93)
>> >> at
>> >>
>> com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:465)
>> >> at
>> >>
>> com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:394)
>> >> at
>> >>
>> com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:274)
>> >> at
>> >>
>> com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
>> >> at
>> >>
>> com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
>> >> at
>> >>
>> com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:152)
>> >> at
>> >>
>> com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:213)
>> >> at
>> >>
>> com.ibm.io.async.AbstractAsyncFuture.fireCompletionActions(AbstractAsyncFuture.java:195)
>> >> at
>> com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
>> >> at
>> >> com.ibm.io.async.ResultHandler.complete(ResultHandler.java:194)
>> >> at
>> >>
>> com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:741)
>> >> at
>> com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:863)
>> >> at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1510)
>> >>
>> >>
>> >> --
>> >> View this message in context:
>> >>
>> http://www.nabble.com/Problem-in-Tree2%3A-nullpointer-org.apache.myfaces.custom.tree2.UITreeData.encodeEnd-tf3990148.html#a11330136
>> >> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>> >>
>> >>
>> >
>> >
>>
>> --
>> View this message in context:
>> http://www.nabble.com/Problem-in-Tree2%3A-nullpointer-org.apache.myfaces.custom.tree2.UITreeData.encodeEnd-tf3990148.html#a11344658
>> Sent from the MyFaces - Users mailing list archive at Nabble.com.
>>
>>
>
>
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