t:selectItems behaviour with Map values is weird
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Key: TOMAHAWK-1403
URL: https://issues.apache.org/jira/browse/TOMAHAWK-1403
Project: MyFaces Tomahawk
Issue Type: Bug
Affects Versions: 1.1.8
Reporter: Simon Kitching
The t:selectItems tag documentation says that the value attribute can return a
Map, and that a list of select-items is built using the key and value of the
map. The docs are completely wrong.
This was originally reported by Johannes Ruthenberg here:
http://mail-archives.apache.org/mod_mbox/myfaces-users/200903.mbox/%3c49babcd9.6030...@software-friends.de%3e
The situation appears to be that:
(a) the myfaces f:selectItems tag handles situations where the value is a Map
by building a list of SelectItems from the map value/key automatically. This
may not be compliant with the JSF specification; I don't know of anywhere that
this behaviour is specified. The class that does this is SelectItemsIterator
(from myfaces shared library).
(b) The tomahawk t:selectItems tag maps to the AbstractUISelectItems component
class. This overrides the handling of Map objects by building the SelectItem
list itself, which disables the behaviour from (a) as the SelectItemsIterator
never sees the Map object. The AbstractUISelectItems custom Map handling does
NOT use the map keys when building the SelectItem list, ie its behaviour is
quite different from what SelectItemsIterator does for maps. It does make it
possible to do some other things when building the SelectItems list, but using
the map key is impossible.
It would be nice to know whether behaviour (a) is also implemented in Mojarra.
If that behaviour is also in Mojarra, then it would be nice for t:selectItems
to be able to behave in a compatible manner. At the least, the t:selectItems
documentation needs to be updated in
tomahawk/core/src/main/tagdoc/t_selectItems-base.xml
The custom Map handling in AbstractUISelectItems was originally added by
Cagatay. It is not clear where the wrong documentation came from, but that is
more recent.
See the email thread for more details.
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