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From Dawid Weiss <>
Subject Re: Clustering lucene's results
Date Thu, 23 Sep 2004 18:01:55 GMT

yeah... I know there have to be demos... I tried to be lazy, you know :)

Anyway, as I told Andrzej -- I'll take a look at it (and with a 
pleasure) after I come back. i don't think the delay will matter much. 
And if it does, ask Andrzej -- he has excellent experience with both 
projects -- he's just very shy by nature and doesn't talk much, hehe.


William W wrote:

> Hi Dawid,
> The demos (under /src/demo) are very good. They have the basic usage 
> scenario.
> Thanks Andrzej.
> William.
>> Dawid Weiss wrote:
>>> Hi William,
>>> No, I don't have examples because I never used Lucene directly. If 
>>> you provide me with a sample index and an API that executes a query 
>>> on this index (I need document titles, summaries, or snippets and an 
>>> anchor (identifier), can be an URL).
>> Hi Dawid :-)
>> I believe the approach to this component should be that you first 
>> initialize it by reading a mapping of Lucene index field names to 
>> "logical" names (metadata) like title, url, body, etc. The reason is 
>> that each index uses its own metadata schema, i.e. in Lucene-speak, 
>> the field names.
>> Moreover, when you execute a query you get just a document id plus its 
>> score. It's up to you to build a snippet. There is a code in the 
>> jakarta-lucene-sandbox CVS repo. (highlighter) to create snippets from 
>> the query and the hit list, take a look at this...
>>> Send me such a snippet and I'll try to write the integration code 
>>> with Lucene. It is only a matter of writing a simple InputComponent 
>>> instance and this is really trivial (see Nutch's plugin code).
>> The basic usage scenario is that you open the IndexReader (either 
>> using directory name as a String or a Directory instance), and then 
>> create a Query instance, usually using QueryParser, and finally you 
>> search using IndexSearcher. You get a list of Hits, which you can use 
>> to get scores, and the contents of the documents. Take a look at the 
>> IndexFiles and SearchFiles classes in org.apache.lucene.demo package 
>> (under /src/demo).
>> -- 
>> Best regards,
>> Andrzej Bialecki
>> -------------------------------------------------
>> Software Architect, System Integration Specialist
>> CEN/ISSS EC Workshop, ECIMF project chair
>> EU FP6 E-Commerce Expert/Evaluator
>> -------------------------------------------------
>> FreeBSD developer (
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