2 Replies Latest reply on Aug 11, 2012 4:07 PM by healeyb

causes 'identifier resolved to null'

ivancosta Mar 14, 2012 7:11 PM

Hi, this question came out from this problem of mine: https://community.jboss.org/message/723859

a4j:commandLink or a4j:ajax tags causes 'identifier resolved to null', but h:commandLink + f:ajax (both from Mojarra) works perfectly fine!

Code for testing:

test.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html

xmlns="http://www.w3.org/1999/xhtml"

xmlns:f="http://java.sun.com/jsf/core"

xmlns:h="http://java.sun.com/jsf/html"

xmlns:ui="http://java.sun.com/jsf/facelets"

xmlns:a4j="http://richfaces.org/a4j"

xmlns:rich="http://richfaces.org/rich"

<h:head>

</h:head>

<f:view>

<h:form>

<h:selectBooleanCheckbox id="checkId" value="#{testBean.checkBox}" >

<a4j:ajax event="click" execute="@this" listener="#{testBean.checkBoxListener}" render="panelId">

</a4j:ajax>

</h:selectBooleanCheckbox>

<h:outputLabel for="checkId">Check me</h:outputLabel>

<a4j:outputPanel id="panelId" >

<h:panelGroup rendered="#{testBean.ruleRender}" >

<div>

<ui:include src="/template/testFrag.xhtml" >

<ui:param name="beanName" value="#{testBean}" />

</ui:include>

</div>

</h:panelGroup>

</a4j:outputPanel>

</h:form>

</f:view>

</html>

/template/testFrag.xhtml

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html

xmlns="http://www.w3.org/1999/xhtml"

xmlns:f="http://java.sun.com/jsf/core"

xmlns:h="http://java.sun.com/jsf/html"

xmlns:ui="http://java.sun.com/jsf/facelets"

xmlns:a4j="http://richfaces.org/a4j"

xmlns:rich="http://richfaces.org/rich"

<ui:fragment>

<table>

<tr>

<td>

<a4j:commandLink value="Click RichFaces" actionListener="#{beanName['fragmentMethodListener']}" render="inputId">

</a4j:commandLink>

</td>

</tr>

<tr>

<td>

<h:commandLink value="Click Mojarra + Mojarra Ajax">

<f:ajax listener="#{beanName['fragmentMethodListener']}" render="inputId">

</f:ajax>

</h:commandLink>

</td>

</tr>

<tr>

<td>

<h:commandLink value="Click Mojarra + RichFaces Ajax">

<a4j:ajax listener="#{beanName['fragmentMethodListener']}" render="inputId">

</a4j:ajax>

</h:commandLink>

</td>

</tr>

<tr>

<td>

<h:inputText id="inputId" value="#{beanName['input']}"></h:inputText>

</td>

</tr>

</table>

</ui:fragment>

</html>

Managed Bean:

import java.io.Serializable;

import javax.annotation.PostConstruct;

import javax.faces.bean.ManagedBean;

import javax.faces.bean.ViewScoped;

@ManagedBean(name="testBean")

@ViewScoped

public class TestBean implements Serializable {

private Boolean checkBox;

private String input;

public Boolean getCheckBox() {

return checkBox;

}

public void setCheckBox(Boolean checkBox) {

this.checkBox = checkBox;

}

public String getInput() {

return input;

}

public void setInput(String input) {

this.input = input;

}

public void checkBoxListener() {

System.out.println("Changed to:" + checkBox);

}

@PostConstruct

private void init() {

checkBox = false;

input = "";

}

public boolean isRuleRender() {

return checkBox;

}

public void fragmentMethodListener() {

input = input + ""+input.length();

}

Environment:

Mojarra 2.1.7

Richfaces 4.2 Final

Tomcat 7.0.26

Complete stacktrace:

INFO: BEFORE INVOKE_APPLICATION 5

14/03/2012 19:59:55 javax.faces.event.MethodExpressionActionListener processAction

GRAVE: 'javax.el.PropertyNotFoundException' recebido ao invocar escuta de ação '#{beanName['fragmentMethodListener']}' para o componente 'j_idt14'

14/03/2012 19:59:55 javax.faces.event.MethodExpressionActionListener processAction

GRAVE: javax.el.PropertyNotFoundException: Target Unreachable, identifier 'beanName' resolved to null

at org.apache.el.parser.AstValue.getTarget(AstValue.java:98)

at org.apache.el.parser.AstValue.invoke(AstValue.java:244)

at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:278)

at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:153)

at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88)

at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:769)

at javax.faces.component.UICommand.broadcast(UICommand.java:300)

at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:794)

at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1259)

at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)

at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)

at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)

at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at foo.login.AuthorizationFilter.doFilter(AuthorizationFilter.java:57)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:662)

14/03/2012 19:59:55 foo.util.PhaseTracker afterPhase

INFO: AFTER INVOKE_APPLICATION 5

14/03/2012 19:59:55 com.sun.faces.context.AjaxExceptionHandlerImpl log

GRAVE: JSF1073: javax.faces.event.AbortProcessingException obtido durante o processamento de INVOKE_APPLICATION 5: UIComponent-ClientId=j_idt5:j_idt14, Message=Target Unreachable, identifier 'beanName' resolved to null

14/03/2012 19:59:55 com.sun.faces.context.AjaxExceptionHandlerImpl log

GRAVE: Target Unreachable, identifier 'beanName' resolved to null

javax.faces.event.AbortProcessingException: Target Unreachable, identifier 'beanName' resolved to null

at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:182)