[WW-2246] Impossible to use custom jsp taglibs inside custom FM template tags

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.9
• Fix Version/s: 2.1.3
• Component/s: Plugin - Tags

Environment

Windows OS, J2SE 1.6, J2EE 5, Struts2

• Flags: Important
• Assignee: Unassigned
• Reporter: Alexey Koloskov
• Created: 12/Oct/07 10:39
• Updated: 28/Oct/12 22:08
• Resolved: 18/Nov/08 17:07

Description

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 org.apache.jasper.runtime.JspWriterImpl@173b3fa 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 org.apache.jasper.runtime.JspWriterImpl@173b3fa 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 org.apache.jasper.runtime.JspWriterImpl@173b3fa pageContext.getOut() is null
at
freemarker.ext.jsp.TagTransformModel.getWriter(TagTransformModel.java:156)
at freemarker.core.Environment.visit(Environment.java:220)
...(tale is omitted)

Issue Links

• is duplicated by: WW-2839 Body content are still flushing using struts2 tags
• relates to: WW-1744 Support Sitemesh's applyDecorator tag using Freemarker Transform