ExcelExportPhaseListener throws NullPointerException
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Key: TOMAHAWK-779
URL: http://issues.apache.org/jira/browse/TOMAHAWK-779
Project: MyFaces Tomahawk
Issue Type: Bug
Affects Versions: 1.1.5-SNAPSHOT
Environment: JDK 1.5.0_07, Tomcat 5.5.12, MyFaces Core 1.13, MyFaces
Tomahawk 1.1.5-SNAPSHOT, Myfaces Tomahawk Sandbox 1.1.5-SNAPSHOT.
com.sun.facelets:jsf-facelets 1.1.11
Reporter: Marco Beelen
On a page in my webapp I use the extDataTable of tomahawk including paging and
sorting. I would like to use the excelExport-component to generate an
excel-file containing the table.
The page renders oke, but when I click on the commandButton an new window
opens, within which the same page is being shown.
In the logfile of my application I see the following stacktrace:
2006-11-14 17:42:40,193 ERROR lifecycle.PhaseListenerManager - Exception in
PhaseListener RESTORE_VIEW(1) afterPhase
java.lang.NullPointerException
at
org.apache.myfaces.custom.excelexport.ExcelExportPhaseListener.generateExcel(ExcelExportPhaseListener.java:104)
at
org.apache.myfaces.custom.excelexport.ExcelExportPhaseListener.afterPhase(ExcelExportPhaseListener.java:57)
at
org.apache.myfaces.lifecycle.PhaseListenerManager.informPhaseListenersAfter(PhaseListenerManager.java:89)
at
org.apache.myfaces.lifecycle.LifecycleImpl.restoreView(LifecycleImpl.java:181)
at
org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:66)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:137)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
....... [ 20 more ]
I'm using com.sun.facelets.FaceletViewHandler as the ViewHandler for my
jsf-application.
The code of my xhtml page is shown below:
<ui:component
xmlns="http://www.w3.org/1999/xhtml";
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:t="http://myfaces.apache.org/tomahawk";
xmlns:s="http://myfaces.apache.org/sandbox";>
<h:form id="selectMarketForm">
<t:dataTable
value="#{marketEditBean.markets}"
var="market" rows="10" id="marketList"
sortColumn="#{marketEditBean.sortColumn}"
sortAscending="#{marketEditBean.sortAscending}"
preserveDataModel="false"
preserveSort="true">
<t:column sortable="true">
<f:facet name="header">
<t:commandSortHeader columnName="id"
arrow="true" propertyName="id">
<h:outputText value="Id"/>
</t:commandSortHeader>
</f:facet>
<h:outputText value="#{market.id}" />
</t:column>
<t:column sortable="true" >
<f:facet name="header">
<t:commandSortHeader
columnName="description" arrow="true" propertyName="description">
<h:outputText value="Description"/>
</t:commandSortHeader>
</f:facet>
<h:commandLink action="#{marketEditBean.select}"
value="#{market.description}" immediate="true">
<t:updateActionListener
property="#{marketEditBean.market}" value="#{market}" />
</h:commandLink>
</t:column>
</t:dataTable>
<h:panelGrid columns="1" styleClass="scrollerTable2"
columnClasses="standardTable_ColumnCentered" >
<t:dataScroller id="scroll_1"
for="marketList"
fastStep="10"
pageCountVar="pageCount"
pageIndexVar="pageIndex"
styleClass="scroller"
paginator="true"
paginatorMaxPages="9"
paginatorTableClass="paginator"
paginatorActiveColumnStyle="font-weight:bold;">
<f:facet name="first" >
<t:graphicImage url="images/arrow-first.gif" />
</f:facet>
<f:facet name="last">
<t:graphicImage url="images/arrow-last.gif" />
</f:facet>
<f:facet name="previous">
<t:graphicImage url="images/arrow-previous.gif" />
</f:facet>
<f:facet name="next">
<t:graphicImage url="images/arrow-next.gif" />
</f:facet>
<f:facet name="fastforward">
<t:graphicImage url="images/arrow-ff.gif" />
</f:facet>
<f:facet name="fastrewind">
<t:graphicImage url="images/arrow-fr.gif" />
</f:facet>
</t:dataScroller>
</h:panelGrid>
<s:excelExport for="marketList">
<h:commandButton value="Export to excel" />
</s:excelExport>
</h:form>
</ui:component>
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