Looks like tree requires a "model" attribute to be set. The error handling could certainly be better since it just throws the NPE rather than a meaningful error, but maybe that's handled in the MyFaces tag for tree.
I also don't see any docs on "model". A look at TreeTag seems to indicate that it's maybe copying the "value" attribute to "model". Try adding a "model" attribute with the same value as "value" The other alternatives are to write a facelets tag handler to deal with this issue, or submit a myfaces patch so that the tag doesn't use different names than the component does. I'm going to cross-post this back to the facelets mailing list because it's unclear where the best place to handle this is (well, I suspect the best place to handle it is to clean up the tree component to not reference an internal "model" valueBinding, but that might not be possible). On 9/23/05, Catalin Kormos <[EMAIL PROTECTED]> wrote: > Hello Mike, > > I tryied with an empty DefaultTreeModel, and got that > error, then i tryied also with a not empty tree model, > and the same... > > Do you have any ideea about what could be wrong? > > Thanks > > --- Mike Kienenberger <[EMAIL PROTECTED]> wrote: > > > For what it's worth, I tried it and got the same > > error a couple days ago. > > I assumed that the problem was that I was trying to > > use a dataTable > > model and that tree required a different model type. > > I wasn't > > willing to invest the time to upgrade my models at > > that time, so I > > didn't pursue it. > > > > -Mike > > > > On 9/22/05, Catalin Kormos <[EMAIL PROTECTED]> > > wrote: > > > Hello, > > > > > > Is there anyone who successfuly used the tree > > table > > > with Facelets? i'm getting the following error, > > and > > > can't seem to find a solution: > > > > > > java.lang.NullPointerException > > > at > > > > > > org.apache.myfaces.custom.tree.HtmlTree.addToModelListeners(HtmlTree.java:829) > > > at > > > > > > org.apache.myfaces.custom.tree.HtmlTree.encodeBegin(HtmlTree.java:706) > > > at > > > > > > org.apache.myfaces.renderkit.RendererUtils.renderChild(RendererUtils.java:441) > > > at > > > > > > org.apache.myfaces.renderkit.RendererUtils.renderChildren(RendererUtils.java:427) > > > at > > > > > > ro.citrusmedia.lims.web.ui.component.collapsiblepanel.HtmlCollapsiblePanelRenderer.encodeChildren(HtmlCollapsiblePanelRenderer.java:71) > > > at > > > > > > javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:319) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.encodeRecursive(FaceletViewHandler.java:513) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.encodeRecursive(FaceletViewHandler.java:518) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.encodeRecursive(FaceletViewHandler.java:518) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.encodeRecursive(FaceletViewHandler.java:518) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.encodeRecursive(FaceletViewHandler.java:518) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.encodeRecursive(FaceletViewHandler.java:518) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.encodeRecursive(FaceletViewHandler.java:518) > > > at > > > > > > com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:447) > > > at > > > > > > org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:300) > > > at > > > > > > javax.faces.webapp.FacesServlet.service(FacesServlet.java:95) > > > at > > > > > > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:237) > > > at > > > > > > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) > > > at > > > > > > org.apache.myfaces.component.html.util.ExtensionsFilter.doFilter(ExtensionsFilter.java:122) > > > at > > > > > > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) > > > at > > > > > > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) > > > at > > > > > > org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:75) > > > at > > > > > > org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:186) > > > at > > > > > > org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:157) > > > at > > > > > > org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214) > > > at > > > > > > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > > > at > > > > > > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > > > at > > > > > > org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198) > > > at > > > > > > org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152) > > > at > > > > > > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > > > at > > > > > > org.jboss.web.tomcat.security.CustomPrincipalValve.invoke(CustomPrincipalValve.java:66) > > > at > > > > > > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) > > > at > > > > > > org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:158) > > > at > > > > > > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) > > > at > > > > > > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > > > at > > > > > > org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137) > > > at > > > > > > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > > > at > > > > > > org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118) > > > at > > > > > > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102) > > > at > > > > > > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > > > at > > > > > > org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) > > > at > > > > > > org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104) > > > at > > > > > > org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520) > > > at > > > > > > org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929) > > > at > > > > > > org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160) > > > at > > > > > > org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799) > > > at > > > > > > org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705) > > > at > > > > > > org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577) > > > at > > > > > > org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:683) > > > at java.lang.Thread.run(Thread.java:595) > > > > > > Thank you. > > > > > > Catalin > > > > > > > > > > > > __________________________________ > > > Yahoo! Mail - PC Magazine Editors' Choice 2005 > > > http://mail.yahoo.com > > > > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com >
