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From Erik Hatcher <>
Subject Re: sorting on a non english based locale field
Date Thu, 30 Dec 2004 08:32:18 GMT

On Dec 29, 2004, at 12:36 PM, Praveen Peddi wrote:
> Hi fellow luceners,
> I was looking at the lucene sorting code and it looks like lucene does 
> consider locale into account while sorting. So I assume lucene already 
> handles for strings.
> But in my case, I wrote my own SortComparator 
> (StringIgnoreCaseSortComparator) to achieve sorting similar to 
> explorer sorting. Because lucene uses java's string.compareTo method 
> and that considers  "case" of each character, I can't use lucene's 
> default string sorting.
> The question is, how do I integrate Locale into my 
> StringIgnoreCaseSortComparator while comparing strings. Lucene's code 
> gets the locale from SortField but I don't have access to SortField in 
> this comparator.
> Any ideas???? Should StringIgnoreCaseSortComparator be just knowing 
> the locale at the time of instantiating?

Yes, when using a custom sorting implementation, you need to hand it 
whatever information it needs to do the sorting.  The Locale parameters 
to SortField are used only in the built-in mechanisms and not part of 
the API for using a custom implementation.


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