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https://issues.apache.org/struts/browse/WW-2246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=44160#action_44160
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James Holmes commented on WW-2246:
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Is this a Struts 2 issue or a Freemarker issue? At first glance it seems like a
Freemarker issue.
> Impossible to use custom jsp taglibs inside custom FM template tags
> -------------------------------------------------------------------
>
> Key: WW-2246
> URL: https://issues.apache.org/struts/browse/WW-2246
> Project: Struts 2
> Issue Type: Bug
> Components: Plugin - Tags
> Affects Versions: 2.0.9
> Environment: Windows OS, J2SE 1.6, J2EE 5, Struts2
> Reporter: Alexey Koloskov
> Fix For: 2.1.3
>
>
> I create custom UI tags for Struts2 using FreeMarker. Inside FreeMarker
> template I use custom jsp tags library, e.g. displaytag as follows:
> <#assign display=JspTaglibs["http://displaytag.sf.net/el";]>
> <@display.table name="parameters.entities"/>.
> But during template rendering I get a such error:
> "freemarker.template.TemplateModelException: out != pageContext.getOut().
> Out is [EMAIL PROTECTED] pageContext.getOut()
> is null" at
> freemarker.ext.jsp.TagTransformModel.getWriter(TagTransformModel.java:156).
> It seems like a bug because for the first time
> FreeMarkerPageContext.getOut() always return null, and the check if(out !=
> pageContext.getOut()) is always true for JSPWriter.
> Stack trace:
> error when rendering out != pageContext.getOut(). Out is [EMAIL PROTECTED]
> pageContext.getOut() is null
> The problematic instruction:
> ----------
> ==> user-directive display.table [on line 4, column 1 in
> template/xhtml/EntityList.ftl]
> ----------
> Java backtrace for programmers:
> ----------
> freemarker.template.TemplateModelException: out != pageContext.getOut().
> Out is [EMAIL PROTECTED] pageContext.getOut() is null
> at
> freemarker.ext.jsp.TagTransformModel.getWriter(TagTransformModel.java:156)
> at freemarker.core.Environment.visit(Environment.java:220)
> ...(tale is omitted)
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