[jsr-314-open] [717-ComponentMetadata] (was: DRY and form with JSF 2)

[Ed Burns]

>> <Norbert.Truchsess at t-online.de> wrote:

NT> it would be way less overhead, if there would be a reference back from
NT> the inputText to the outputLabel that is actually stored with the
NT> inputText and not just logically defined by the 'for' attribute of
NT> label. If a reference to the outputLabel would be stored in a collection
NT> with the inputText by setting the 'for'-attribute on outputLabel it
NT> could be just taken from there and wouln't require runtime-walk of the
NT> component-tree to be retrieved.

On Tue, Sep 15, 2009 at 3:24 PM, Dan Allen <dan.j.allen at gmail.com> wrote:

DA> +1. Exactly what I was thinking.
DA> 
DA> It appears we have two correlated issues here. I've found a need for the
DA> backreference in the past. It can be linked at build time. Of course,
DA> programmatic access would need to be aware of it if the tree is modified in
DA> a way that breaks the reference. That should be mentioned in the issue
DA> report, not necessarily solved here.

>>>>> On Fri, 09 Oct 2009 02:46:31 +0200, Martin Marinschek <mmarinschek at apache.org> said:

MM> FWIW, MyFaces originally implemented a solution for this, but then
MM> dropped it from the IMPL and moved it to Tomahawk, to remain
MM> compatible.

It seems to me that this is a request for a general purpose component
metadata solution.  Right now we have this in the spec:  

3.6.2.1 Composite Component Metadata

  In the current version of the specification, only composite
  UIComponents must have component metadata.  It is possible that future
  versions of the specification will broaden this requiremnt so that all
  UIComponents must have metadata.

I've opened issue 717 for this, and added this specific usecase.  I'll
continue to scan for this topic in my traversal of old messages, but
just in case I miss something, please add additional requirements to the
issue.

Ed

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