Ability to set default comparator for sorting String columns
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Key: DISPL-306
URL: http://jira.codehaus.org/browse/DISPL-306
Project: DisplayTag
Type: Improvement
Components: Paging/Sorting
Reporter: Tim Fennell
The ability to use custom comparators for sorting in DT1.1 is a big step
forward. However, for sites with lots of tables it would be really nice to be
able to specify a default comparator other than the DefaultComparator included
in display tag. This way you could define the comparator class to be used
once, and not have to repeat it on every single table and column where it was
needed.
I should state that ideally the setting would be displaytag.properties and
would only set the default for sorting Strings! The fact that DisplayTag
correctly sorts numbers (and other rich types?) correctly in DT1.1 is great,
and I wouldn't want to have to reimplement the type-detection code etc.
The reason I'd like to be able to do this is to be able to sort strings in a
more human-orienteded manner. For example Mac OS X will sort the values
"foo1", "foo2" and "foo10" in the order given, NOT "foo1", "foo10", "foo2"
which is correct if you are doing a strict alpha-numeric character sort. Of
course if the DefaultComparator were enhanced to include such logic then that
would meet my needs pretty well too! For a longer discussion on sorting of
Strings and an example of the comparator I'd like to use check out:
http://jroller.com/page/tfenne?entry=humanestringcomparator_sorting_strings_for_people
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