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https://issues.apache.org/jira/browse/TRINIDAD-905?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias Weßendorf resolved TRINIDAD-905.
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Resolution: Fixed
> Support ability for Renderers to recursively skip over components that
> establish context when rendering
> -------------------------------------------------------------------------------------------------------
>
> Key: TRINIDAD-905
> URL: https://issues.apache.org/jira/browse/TRINIDAD-905
> Project: MyFaces Trinidad
> Issue Type: New Feature
> Components: Components
> Affects Versions: 1.2.6-core
> Reporter: Blake Sullivan
> Fix For: 1.2.6-core
>
> Attachments: Trinidad-905.patch
>
>
> Components that solely setup context for their children, logically represent
> a grouping for their children, or pick a child to render from a group of
> children cause problems both for Renderers that would like to encode a
> flattened view of their children, recursively including the leaf children and
> for components that have strict requirements regarding the types of their
> children. A good example of the first problem is a UIXPanelFormLayout
> containing a UIXIterator. The UIXPanelFormLayout would like to lay out the
> flattened view of the child stamps generated by the UIXIterator, but cannot
> because it doesn't know anything about UIXIterator. Likewise, it would like
> to flatten out the children of UIXSwitcher and UIXGroup. Further, it would
> like this flattening to be recursive--a UIXIterator containing a UIXSwitcher
> containing a UIXGroup containing a UIXIterator should result in a flattened
> view of the children.
> The proposed solution is to use the visitor pattern to visit each child in
> turn in the correct context. The solution is primarily made up of three
> parts:
> 1) The ComponentProcessor interface implemented by the visitor
> 2) A FlattenedComponent interface implemented by UIComponents that wish to
> expose a flattened view of their children in the correct context
> 3) UIXComponent static helper functions for performing recursive iteration
> over mixtures of FlattenedComponents and normal UIComponents. Helpers are
> provided both for Renderers to call to perform flattened encoding and for
> FlattenedComponents to call as part of their flattening implementation
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