Hi,
I try javadoc sample to use a tree and I have NullpointerException. My
sample is very basic so I can understand why.
An idea,
thanks
My JSP page:
<%@ taglib uri="http://java.sun.com/jsf/html"; prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core"; prefix="f"%>
<%@ taglib uri="http://xmlns.oracle.com/adf/faces"; prefix="af"%>
<f:view>
<af:document>
<f:facet name="metaContainer">
<f:verbatim>
<meta http-equiv="expires" content="0" />
<meta http-equiv="pragma" content="no-cache" />
<meta http-equiv="cache-control" content="no-cache,
must-revalidate" />
</f:verbatim>
</f:facet>
<af:tree var="node" value="#{treeModel.model}">
<f:facet name="nodeStamp">
<af:outputText value="#{node.name}"/>
</f:facet>
</af:tree>
</af:document>
</f:view>
My backing bean
import java.util.ArrayList;
import java.util.List;
import oracle.adf.view.faces.model.ChildPropertyTreeModel;
import com.sunopsis.lwd.data.Person;
public class MyTreeModel {
oracle.adf.view.faces.model.TreeModel model = null;
public oracle.adf.view.faces.model.TreeModel getModel() {
if (model == null) {
Person john = new Person("John Smith");
Person kim = new Person("Kim Smith");
Person tom = new Person("Tom Smith");
Person ira = new Person("Ira Wickrememsinghe");
Person mallika = new Person("Mallika Wickremesinghe");
john.getKids().add(kim);
john.getKids().add(tom);
ira.getKids().add(mallika);
// create the list of root nodes:
List people = new ArrayList();
people.add(john);
people.add(ira);
//model = new ChildPropertyTreeModel(people, "kids");
model=new ChildPropertyTreeModel();
}
return model;
}
}
When I browse my page tomcat log this error
javax.faces.FacesException: java.lang.NullPointerException
at
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:439)
at
org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:234)
at
oracle.adfinternal.view.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:159)
at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl._invokeDoFilter(AdfFacesFilterImpl.java:279)
at
oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl._doFilterImpl(AdfFacesFilterImpl.java:248)
at
oracle.adfinternal.view.faces.webapp.AdfFacesFilterImpl.doFilter(AdfFacesFilterImpl.java:172)
at
oracle.adf.view.faces.webapp.AdfFacesFilter.doFilter(AdfFacesFilter.java:80)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:595)
Caused by: java.lang.NullPointerException
at
oracle.adfinternal.view.faces.ui.laf.base.xhtml.FormValueRenderer.addNeededValue(FormValueRenderer.java:114)
at
oracle.adfinternal.view.faces.ui.laf.base.xhtml.FormValueRenderer.addNeededValue(FormValueRenderer.java:91)
at
oracle.adfinternal.view.faces.ui.laf.base.desktop.TreeRenderer._renderContent(TreeRenderer.java:144)
at
oracle.adfinternal.view.faces.ui.laf.base.desktop.TreeRenderer.renderContent(TreeRenderer.java:67)
at
oracle.adfinternal.view.faces.ui.BaseRenderer.render(BaseRenderer.java:81)
at
oracle.adfinternal.view.faces.ui.laf.base.xhtml.XhtmlLafRenderer.render(XhtmlLafRenderer.java:66)
at
oracle.adfinternal.view.faces.uinode.UIXComponentUINode.renderInternal(UIXComponentUINode.java:177)
at
oracle.adfinternal.view.faces.uinode.UINodeRendererBase.encodeEnd(UINodeRendererBase.java:53)
at
oracle.adf.view.faces.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:624)
at
oracle.adf.view.faces.component.UIXCollection.encodeEnd(UIXCollection.java:440)
at
oracle.adfinternal.view.faces.renderkit.core.CoreRenderer.encodeChild(CoreRenderer.java:236)
at
oracle.adfinternal.view.faces.renderkit.core.CoreRenderer.encodeAllChildren(CoreRenderer.java:255)
at
oracle.adfinternal.view.faces.renderkit.core.xhtml.PanelPartialRootRenderer.renderContent(PanelPartialRootRenderer.java:65)
at
oracle.adfinternal.view.faces.renderkit.core.xhtml.BodyRenderer.renderContent(BodyRenderer.java:117)
at
oracle.adfinternal.view.faces.renderkit.core.xhtml.PanelPartialRootRenderer.encodeAll(PanelPartialRootRenderer.java:147)
at
oracle.adfinternal.view.faces.renderkit.core.xhtml.BodyRenderer.encodeAll(BodyRenderer.java:60)
at
oracle.adfinternal.view.faces.renderkit.core.CoreRenderer.delegateRenderer(CoreRenderer.java:271)
at
oracle.adfinternal.view.faces.renderkit.core.xhtml.DocumentRenderer.encodeAll(DocumentRenderer.java:60)
at
oracle.adfinternal.view.faces.renderkit.core.CoreRenderer.encodeEnd(CoreRenderer.java:159)
at
oracle.adf.view.faces.component.UIXComponentBase.encodeEnd(UIXComponentBase.java:624)
at javax.faces.webapp.UIComponentTag.encodeEnd(UIComponentTag.java:495)
at javax.faces.webapp.UIComponentTag.doEndTag(UIComponentTag.java:363)
at
oracle.adf.view.faces.webapp.UIXComponentTag.doEndTag(UIXComponentTag.java:100)
at org.apache.jsp.print_jsp._jspx_meth_af_document_0(print_jsp.java:168)
at org.apache.jsp.print_jsp._jspx_meth_f_view_0(print_jsp.java:115)
at org.apache.jsp.print_jsp._jspService(print_jsp.java:80)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:332)
at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:672)
at
org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:463)
at
org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:398)
at
org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
at
org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:416)
... 24 more
