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https://issues.apache.org/jira/browse/WICKET-753?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12512521
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Jonathan Locke commented on WICKET-753:
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BTW, it would be fine to be clever and still use a map for speed so long as the
ordering is preserved.
> mounts stored in non-ordered map
> --------------------------------
>
> Key: WICKET-753
> URL: https://issues.apache.org/jira/browse/WICKET-753
> Project: Wicket
> Issue Type: Bug
> Components: wicket
> Affects Versions: 1.3.0-beta3
> Reporter: Jonathan Locke
> Priority: Minor
>
> Because WebRequestCodingStrategy now uses a map to store mounted encoders (it
> was meant to be a list for exactly the reason this bug is being submitted),
> it is no longer possible to override encoders based on subclasses. For
> example, if you mount Foo on "/foo" and Foo has subclasses Bar and Baz, those
> subclasses are also mounted on "/foo", which is good. But then mounting Bar
> on "/bar" does not (or at least MAY not) override this functionality even if
> you install it before the "/foo" mount (which i would expect to work). To
> resolve this issue, encoders ought to be searched for a match in the order
> that they were added and not in some random order defined by the map they are
> being stored in.
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