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From AlexElba <ramal...@yahoo.com>
Subject Re: Best way for paging with TopDocs class?
Date Thu, 16 Apr 2009 23:30:20 GMT

Why you don't extend to HitCollector  and put all logic you need into it?




Ivan Vasilev-2 wrote:
> 
> Hi All,
> 
> As Hits class was deprecated in current Lucene and is expected to be 
> excluded from Lucene 3.0 we decided to change our code so that to use 
> TopDocs class.
> Our app provides paging and now we are uondering what is the bset way to 
> do it with th TopDocs. I can see only this possibility:
> 1. User opens page 1 - we load by searcher.search(..., docNum, ... ) 
> method as many docs as for page 1;
> 2. User opens page 2 - we load as many results as the amount for page 1 
> and page 2 (note that docs for page 1 are loaded again);
> ...
> N. User opens page n - we load as many docs as the amount of all pages 
> from #1 to #N (note that page 1 docs were loaded N-1 times, page 2 docs 
> N-2 times etc).
> 
> With Hits class this loading of documents of previous pages was avoided 
> - they were loaded once and when needed docs for the next page Hits just 
> loaded the next portion of docs without reloading the previous pages.
> 
> So my question is:
> Is there better way for paging with the class TopDocs than the one that 
> I describe here?
> 
> Thanks in Advance,
> Ivan
> 
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