Hi,
I have been searching the forum but haven't found any hints on what's wrong
and the reason why this exception is thrown.
The example I provided is cut down to the basics. An action returning null
or "" should be possible right?
I would really appreciate if someone could take a look into this. Thanks!
jdk1.6.0_21
myfaces-core-2.0.1-bin\lib\commons-beanutils-1.7.0.jar
myfaces-core-2.0.1-bin\lib\commons-codec-1.3.jar
myfaces-core-2.0.1-bin\lib\commons-collections-3.2.jar
myfaces-core-2.0.1-bin\lib\commons-digester-1.8.jar
myfaces-core-2.0.1-bin\lib\commons-discovery-0.4.jar
myfaces-core-2.0.1-bin\lib\commons-logging-1.1.1.jar
myfaces-core-2.0.1-bin\lib\myfaces-api-2.0.1.jar
myfaces-core-2.0.1-bin\lib\myfaces-impl-2.0.1.jar
jakarta-taglibs-standard-1.1.2\lib\jstl.jar
jakarta-taglibs-standard-1.1.2\lib\standard.jar
On apache-tomcat-6.0.29
SEVERE: An exception occurred
javax.faces.FacesException: java.lang.NullPointerException
at
org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.wrap(ExceptionHa
ndlerImpl.java:241)
at
org.apache.myfaces.shared_impl.context.ExceptionHandlerImpl.handle(Exception
HandlerImpl.java:156)
at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:258)
at
javax.faces.webapp.FacesServlet.service(FacesServlet.java:191)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:290)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:206)
at
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl._doFilterImpl(
TrinidadFilterImpl.java:247)
at
org.apache.myfaces.trinidadinternal.webapp.TrinidadFilterImpl.doFilter(Trini
dadFilterImpl.java:157)
at
org.apache.myfaces.trinidad.webapp.TrinidadFilter.doFilter(TrinidadFilter.ja
va:92)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application
FilterChain.java:235)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh
ain.java:206)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja
va:233)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja
va:191)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127
)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102
)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java
:109)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http
11Protocol.java:588)
at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.NullPointerException
at
org.apache.myfaces.trinidadinternal.application.StateManagerImpl._removeTran
sientComponents(StateManagerImpl.java:844)
at
org.apache.myfaces.trinidadinternal.application.StateManagerImpl.saveView(St
ateManagerImpl.java:166)
at
org.apache.myfaces.view.facelets.FaceletViewDeclarationLanguage.renderView(F
aceletViewDeclarationLanguage.java:1170)
at
org.apache.myfaces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.ja
va:264)
at
javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.jav
a:59)
at
org.apache.myfaces.trinidadinternal.application.ViewHandlerImpl.renderView(V
iewHandlerImpl.java:212)
at
org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseEx
ecutor.java:85)
at
org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:239)
... 18 more
I have briefly included my files:
commandButton.xhtml
<ui:composition xmlns="http://www.w3.org/1999/xhtml";
xmlns:ui="http://java.sun.com/jsf/facelets";
xmlns:tr="http://myfaces.apache.org/trinidad";
template="template.xhtml">
<ui:define name="centerContents">
<tr:inputText label="Your name" value="#{commandButtonBean.name}"/>
<!-- commandButtonBean.sayHello causing exception -->
<tr:commandButton text="Say Hello"
action="#{commandButtonBean.sayHello}"/>
<tr:commandButton text="Go to page1.xhtml" action="success"/>
<tr:commandButton text="Go to gpstracer" action="gpstracer"/>
<tr:outputText value="#{commandButtonBean.message}"/>
</ui:define>
</ui:composition>
faces-config.xml
<faces-config xmlns="http://java.sun.com/xml/ns/javaee";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd";
version="2.0">
<application>
<!-- Use the Trinidad RenderKit -->
<default-render-kit-id>
org.apache.myfaces.trinidad.core
</default-render-kit-id>
...
<navigation-rule>
<from-view-id>/pages/commandButton.xhtml</from-view-id>
<navigation-case>
<from-outcome>success</from-outcome>
<to-view-id>/page1.xhtml</to-view-id>
<redirect/>
</navigation-case>
<navigation-case>
<from-outcome>gpstracer</from-outcome>
<to-view-id>/pages/gpstracer.xhtml</to-view-id>
<redirect/>
</navigation-case>
</navigation-rule>
...
CommandButtonBean.java
...
public String sayHello() {
message="Hello "+name+"!";
return null;
}
...
template.xml
<?xml version="1.0" encoding="UTF-8"?>
<tr:document xmlns:ui="http://java.sun.com/jsf/facelets";
xmlns:h="http://java.sun.com/jsf/html";
xmlns:f="http://java.sun.com/jsf/core";
xmlns:c="http://java.sun.com/jstl/core";
xmlns:tr="http://myfaces.apache.org/trinidad";
xmlns:trh="http://myfaces.apache.org/trinidad/html";>
<f:facet name="metaContainer">
<meta name="title" content="navigationHandler.currentPageTitle"/>
<meta name="robots" content="index, follow"/>
</f:facet>
<tr:form id="mainForm">
<div class="centerContents">
<ui:insert name="centerContents"/>
</div>
</tr:form>
<ui:debug/>
</tr:document>
-Micah
