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https://issues.apache.org/jira/browse/MYFACES-2645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854685#action_12854685
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Leonardo Uribe commented on MYFACES-2645:
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The javadocs of UIViewParameter.encodeAll says this:
".......Called specially by
UIViewRoot.encodeEnd(javax.faces.context.FacesContext), this method simply sets
the submitted value to be the return from
getStringValue(javax.faces.context.FacesContext)......"
My question is why? isn't that bad?
> The view state is saved before encodeAll() is called on every UIViewParameter
> in an AJAX request
> ------------------------------------------------------------------------------------------------
>
> Key: MYFACES-2645
> URL: https://issues.apache.org/jira/browse/MYFACES-2645
> Project: MyFaces Core
> Issue Type: Bug
> Components: JSR-314
> Affects Versions: 2.0.0-beta-3
> Reporter: Jakob Korherr
> Assignee: Jakob Korherr
> Attachments: MYFACES-2645-spec-proposal.patch
>
>
> UIViewParameter calls setSubmittedValue() in encodeAll() to store the current
> value of the view parameter in the state as the submitted value (this helps
> UIViewParameter to restore its value on a postback).
> UIViewParameter.encodeAll() itself is called by UIViewRoot.encodeEnd() for
> every UIViewParameter in the view.
> If the current request is an ajax-request, the view state is currently
> already generated in UIViewRoot.encodeChildren() (before
> UIViewRoot.encodeEnd()). At this time the submitted value for every
> UIViewParameter is null, because its encodeAll()-method was not called yet.
> Later, when UIViewRoot.encodeEnd() is called, UIViewParameter.encodeAll() is
> called and it sets the submitted value correctly, but due to the fact that
> the state has already been generated, these changes are dropped.
> This causes the value of every UIViewParameter to be set to null in the next
> request, which will most likely end in validation problems with the required
> validator.
> The related thread to this issue from the mailing list can be found at:
> http://www.junlu.com/list/43/611590.html
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