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https://issues.apache.org/jira/browse/TOMAHAWK-1230?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hazem Saleh resolved TOMAHAWK-1230.
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Resolution: Fixed
I resolved this after making the <s:exporterActionListener .../>.
> Excel Export Control uses HTTP get request, which should avoid restore view
> phase, thus the DataTable will be unavailable.
> --------------------------------------------------------------------------------------------------------------------------
>
> Key: TOMAHAWK-1230
> URL: https://issues.apache.org/jira/browse/TOMAHAWK-1230
> Project: MyFaces Tomahawk
> Issue Type: Bug
> Affects Versions: 1.1.5, 1.1.6
> Environment: Any
> Reporter: Chris Hornsey
> Assignee: Hazem Saleh
>
> I was recently debugging the excelExport component and phaseListener. A core
> requirement of this component is that the user clicks the link created by the
> component and the browser will send a get request to reopen the page. The
> phase listener will fire on the restore view phase, and write the excel
> representation of the table to the response prior to the response being
> written to the client.
> According to the JSF spec, if the JSF handler receives a get request from a
> client it should bypass recreating the component tree during the restore view
> phase and go directly to the render response phase since clearly nothing has
> changed in the view. When this happens the phase listener will throw a null
> pointer exception due to the fact that the component can not be retrieved
> from the view since the view will not be recreated until the response is
> rendered.
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