How to get the "context" of the searched word ?

[Eternal Security <ve...@wanadoo.fr>]

Hello all

When i search a word on documents, i want to get also the "context" of the word, for examples the 10 words before and after.
Like in search engine like google or yahoo.

So i have tried to use the Highlight modules, but Highlight need to get a String of the contents.

I use this function :

highlighter.highlightText(myString);

myString must to be the contents of the whole document !

But of course i don't want to store all the contents in the index files !

How can i do ?

I'm  sure i'm not the first lucene's user who want to get the "context" of the searched word.
I need to use Highlight or do you know a better way ?


Thanks in advance.


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Re: How to get the "context" of the searched word ?

[David Spencer <da...@tropo.com>]

Eternal Security wrote:

> Hello all
> 
> When i search a word on documents, i want to get also the "context" of the word, for examples the 10 words before and after.
> Like in search engine like google or yahoo.
> 
> So i have tried to use the Highlight modules, but Highlight need to get a String of the contents.
> 
> I use this function :
> 
> highlighter.highlightText(myString);
> 
> myString must to be the contents of the whole document !
> 
> But of course i don't want to store all the contents in the index files !
> 
> How can i do ?
> 
> I'm  sure i'm not the first lucene's user who want to get the "context" of the searched word.
> I need to use Highlight or do you know a better way ?

This is just the way it is - you can always compress the content. Only 
alternative is enabling term vectors for the body field - then - (um..I 
think) you don't need the entire content separately - instead is comes 
from the Lucene index.
To store the term vector the 3rd arg here will be true.
http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/document/Field.html#Text(java.lang.String,%20java.lang.String,%20boolean)
I believe the index size will increase, but I haven't measured it.

> 
> 
> Thanks in advance.
> 
> 
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> 


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