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From "Pavitra Subramaniam (JIRA)" <>
Subject [jira] Updated: (TRINIDAD-1649) UnsupportedOperationException when rendering 'updates' for the render target on postback
Date Wed, 02 Dec 2009 00:38:20 GMT


Pavitra Subramaniam updated TRINIDAD-1649:

    Status: Patch Available  (was: Open)

> UnsupportedOperationException when rendering 'updates' for the render target on postback
> ----------------------------------------------------------------------------------------
>                 Key: TRINIDAD-1649
>                 URL:
>             Project: MyFaces Trinidad
>          Issue Type: New Feature
>          Components: Components
>    Affects Versions: 2.0.0-core
>         Environment: Running Trinidad 2.0.x; with Facelets; no Partial State Saving and
using JSF Ajax request rather than the Trinidad PPR mechanism
>            Reporter: Pavitra Subramaniam
> 1. Download the patch onto your Trinidad 2.0.x branch (minus the ResponseWriter class
changes). Run the page ajaxPPRDemos.jspx. Click on the "Partial Submit" button which posts
back to the server using the JSF Ajax communication channel rather than the trinidad. Notice
the UnsupportedOperationException.
> java.lang.UnsupportedOperationException
>  at javax.faces.context.ResponseWriter.endCDATA(
>  at javax.faces.context.ResponseWriterWrapper.endCDATA(
>  at javax.faces.context.PartialResponseWriter.endUpdate(
>  at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit
>      (
>  at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback
>      (
>  at javax.faces.component.UIComponent.visitTree(
>  at javax.faces.component.UIComponent.visitTree(
> 2. It looks like JSF 2.0 added new methods startCDATA() and endCDATA() methods, which
need to be used by the trinidad ResponseWriterDecorator and other implemetations of ResponseWriter.

> 3. the ReponseWriter fixes patch makes the following fixes:
> (now extends ResponseWriterWrapper. Ideally we should remove
ResponseWriterDecorator entirely and just use JSF2.0 ResponseWriterWrapper)
> (overrides 2 new methods sneakily added to javax.faces.context.ResponseWriter
but never really gives a compilation error).
> (same as above)
> (-do-)
> Note that under normal circumstances these exceptions are not seen. Only when testing
with JSF 2.0 Ajax. 

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