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https://issues.apache.org/jira/browse/TAPESTRY-573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jesse Kuhnert resolved TAPESTRY-573.
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Resolution: Fixed
I don't know when it was resolved but I do see an exists method on the
ApplicationStateManager interface, is this what you meant? If not please
re-open.
> would like InjectStateWorker to add an "exists" method
> ------------------------------------------------------
>
> Key: TAPESTRY-573
> URL: https://issues.apache.org/jira/browse/TAPESTRY-573
> Project: Tapestry
> Issue Type: Improvement
> Components: Framework
> Affects Versions: 4.0
> Reporter: Dustin Frazier
> Priority: Minor
> Fix For: 4.1.2
>
>
> It would be really useful if the injection of an application state object
> added not only a getter method but also an "exists" method to check whether
> the state object has been created. The alternative is to use the state:
> binding prefix, but this can't be combined in an ognl expression, which makes
> using it somewhat cumbersome. If an "exists" method was added, it would make
> it possible to do the usual "check if it exists, then check a value within
> it" pattern in one conditional expression.
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