Hi,

 

I have been using listShuttle without any issue so far. Recently I am updating sourceValue attribute basing on the search criteria. After this modification now and then while doing copy, remove

 

or removeAll or Copy All, getting following exception. Could anybody suggest, what is the possible cause for this exception.

 

;09:29:46;509; ERROR seam.web.ExceptionFilter;:(ExceptionFilter.java:doFilter():69) - exception root cause

java.lang.NullPointerException

at org.ajax4jsf.webapp.FilterServletResponseWrapper$ServletStringWriter.write(FilterServletResponseWrapper.java:319)

at java.io.Writer.write(Writer.java:175)

at java.io.PrintWriter.write(PrintWriter.java:412)

at java.io.PrintWriter.write(PrintWriter.java:429)

at fr.xebia.servlet.filter.ExpiresFilter$XPrintWriter.write(ExpiresFilter.java:919)

at com.sun.facelets.util.DevTools.debugHtml(DevTools.java:111)

at com.sun.facelets.FaceletViewHandler.handleRenderException(FaceletViewHandler.java:692)

at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:660)

at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)

at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)

at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)

at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)

at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)

at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:530)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at fr.xebia.servlet.filter.ExpiresFilter.doFilter(ExpiresFilter.java:1243)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)

at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)

at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)

at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)

at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:206)

at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)

at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:388)

at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:515)

at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)

at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)

at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)

at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)

at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)

at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)

at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241)

at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:437)

at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:381)

at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)

at java.lang.Thread.run(Thread.java:619)

 

 

Code :

 

<h:panelGrid rendered="#{appAdminHelper.searchbuttonenable}">

    

       <h:outputText value="Search Component" style="font-weight:bold" />

        <rich:spacer />

       <h:inputText value="#{appAdminHelper.searchComp}"

        id="searchStrInput">

       <a4j:support event="onblur" reRender="searchStrInput" ajaxSingle="true"/>

       </h:inputText>

      </h:panelGrid>

      <h:panelGrid columns="1" rendered="#{appAdminHelper.searchbuttonenable}">

       <rich:spacer height="20px"/>

       <a4j:commandButton action="#{appAdminHelper.searchComponents}"

        styleClass="addContactButton" value="Search" ajaxSingle="true"

        status="waitStatus" reRender="componentsInstances"

        oncomplete="#{facesContext.maximumSeverity == null ? 'Richfaces.hideModalPanel(\'messagesPanel\');'

       : 'Richfaces.showModalPanel(\'messagesPanel\');'}" />

      </h:panelGrid>

     </h:panelGrid>

     </a4j:region>

     <h:panelGrid id="componentsInstances">

     <a4j:outputPanel id="listshuttleWrapper">

      <rich:listShuttle

       sourceValue="#{appAdminHelper.componentInstances}"

       targetValue="#{appAdminHelper.mappedComps}" listsHeight="250"

       sourceListWidth="200" targetListWidth="200"

       sourceCaptionLabel="UnMapped Components"

       targetCaptionLabel="Mapped Components" id="listshuttle" var="i">

       <rich:column>

        <h:outputText value="#{i}" />

       </rich:column>

       <a4j:support event="onlistchanged" reRender="componentsInstances,listshuttle"/>

      </rich:listShuttle>

     </a4j:outputPanel>

     </h:panelGrid>