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From Amin Mohammed-Coleman <ami...@gmail.com>
Subject Re: Lucene Highlighting and Dynamic Summaries
Date Thu, 12 Mar 2009 11:48:33 GMT
JIRA raised:

https://issues.apache.org/jira/browse/LUCENE-1559

Thanks

On Thu, Mar 12, 2009 at 11:29 AM, Amin Mohammed-Coleman <aminmc@gmail.com>wrote:

> Hi
>
> Did both attachments not come through?
>
> Cheers
> Amin
>
>
> On Thu, Mar 12, 2009 at 9:52 AM, mark harwood <markharw00d@yahoo.co.uk>wrote:
>
>> The attachment didn't make it through here. Can you add it as an
>> attachment to a new JIRA issue?
>>
>> Thanks,
>> Mark
>>
>>
>>
>>
>>
>> ________________________________
>> From: Amin Mohammed-Coleman <aminmc@gmail.com>
>> To: java-user@lucene.apache.org
>> Sent: Thursday, 12 March, 2009 7:47:20
>> Subject: Re: Lucene Highlighting and Dynamic Summaries
>>
>> Hi
>>
>> Please find attadched a test case plus a document.  Just to mention this
>> occurs sometimes for other files.
>>
>>
>> Cheers
>> Amin
>>
>>
>> On Wed, Mar 11, 2009 at 6:11 PM, markharw00d <markharw00d@yahoo.co.uk>
>> wrote:
>>
>> If you can supply a Junit test that recreates the problem I think we can
>> start to make progress on this.
>>
>>
>>
>> Amin Mohammed-Coleman wrote:
>>
>> Hi
>>
>> Apologies for re sending this mail. Just wondering if anyone has
>> experienced the below.. I'm not sure if this could happen due nature of
>> document. It does seem strange one term search returns summary while another
>> does not even though same document is being returned.
>>
>> I'm asking this so I can code around this if is normal.
>>
>>
>> Apologies again for re sending this mail
>>
>> Cheers
>>
>> Amin
>>
>> Sent from my iPhone
>>
>> On 9 Mar 2009, at 07:50, Amin Mohammed-Coleman <aminmc@gmail.com> wrote:
>>
>>
>> Hi
>>
>> I am seeing some strange behaviour with the highlighter and I'm wondering
>> if anyone else is experiencing this.  In certain instances I don't get a
>> summary being generated.  I perform the search and the search returns the
>> correct document.  I can see that the lucene document contains the text in
>> the field.  However after doing:
>>
>>   SimpleHTMLFormatter simpleHTMLFormatter = new SimpleHTMLFormatter("<span
>> class=\"highlight\"><b>", "</b></span>");
>>           //required for highlighting
>>           Query query2 = multiSearcher.rewrite(query);
>>           Highlighter highlighter = new Highlighter(simpleHTMLFormatter,
>> new QueryScorer(query2));
>> ...
>>
>> String text= doc.get(FieldNameEnum.BODY.getDescription());
>>               TokenStream tokenStream =
>> analyzer.tokenStream(FieldNameEnum.BODY.getDescription(), new
>> StringReader(text));
>>               String result = highlighter.getBestFragments(tokenStream,
>> text, 3, "...");
>>
>>
>> the string result is empty.  This is very strange, if i try a different
>> term that exists in the document then I get a summary.  For example I have a
>> word document that contains the term "document" and "aspectj".  If I search
>> for "document" I get the correct document but no highlighted summary.
>>  However if I search using "aspectj" I get the same doucment with
>> highlighted summary.
>>
>> Just to mentioned I do rewrite the original query before performing the
>> highlighting.
>>
>> I'm not sure what i'm missing here.  Any help would be appreciated.
>>
>> Cheers
>> Amin
>>
>> On Sat, Mar 7, 2009 at 4:32 PM, Amin Mohammed-Coleman <aminmc@gmail.com>
>> wrote:
>> Hi
>>
>> Got it working!  Thanks again for your help!
>>
>>
>> Amin
>>
>>
>> On Sat, Mar 7, 2009 at 12:25 PM, Amin Mohammed-Coleman <aminmc@gmail.com>
>> wrote:
>> Thanks!  The final piece that I needed to do for the project!
>>
>> Cheers
>>
>> Amin
>>
>> On Sat, Mar 7, 2009 at 12:21 PM, Uwe Schindler <uwe@thetaphi.de> wrote:
>> > cool.  i will use compression and store in index. is there anything
>> > special
>> > i need to for decompressing the text? i presume i can just do
>> > doc.get("content")?
>> > thanks for your advice all!
>>
>> No just use Field.Store.COMPRESS when adding to index and Document.get()
>> when fetching. The decompression is automatically done.
>>
>> You may think, why not enable compression for all fields? The case is,
>> that
>> this is an overhead for very small and short fields. So you should only
>> use
>> it for large contents (it's the same like compressing very small files as
>> ZIP/GZIP: These files mostly get larger than without compression).
>>
>> Uwe
>>
>>
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>>
>>
>>
>>
>>
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>>
>>
>>
>>
>>
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