Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-user@lucene.apache.org
Received-SPF: neutral (athena.apache.org: local policy)
Message-Id: <29DE3473-ED90-4431-8BD6-59E1FF57E623@apache.org>
From: Grant Ingersoll <gsingers@apache.org>
To: java-user@lucene.apache.org
In-Reply-To: <839ba01c0802140044l518d2c5dt39960d3f1a1dffaf@mail.gmail.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Content-Transfer-Encoding: 7bit
Mime-Version: 1.0 (Apple Message framework v919.2)
Subject: Re: How to pass additional information into
 Similarity.scorePayload(...)
Date: Fri, 15 Feb 2008 07:49:11 -0500
References: <839ba01c0802130131x3afecdcdna3825cab69adc3a9@mail.gmail.com>
 <6929E41F-F5CA-4BFD-ADE4-B75D3EAA75EA@apache.org>
 <839ba01c0802131711v5754b5fanaefbb2f5a5a4c3fb@mail.gmail.com>
 <200802140758.06967.paul.elschot@xs4all.nl>
 <839ba01c0802140044l518d2c5dt39960d3f1a1dffaf@mail.gmail.com>


On Feb 14, 2008, at 3:44 AM, Cedric Ho wrote:
>
> Anyway, I know my requirement is a bit strange, so it's ok if I can't
> do this in Lucene. I'll settle with using a ThreadLocal to store the
> [10/5/2] weighting and retrieve it in the Similarity.scorePayload(...)
> function.
>

I don't think you are still considering this, but I wanted to note  
that Similarity.scorePayload() is a call back function, just like the  
other methods on Similarity.  The only query that currently makes that  
callback is the BoostingTermQuery.  Essentially, the only queries that  
can use payloads are those that use position information when scoring,  
i.e. the SpanQuerys, of which the BoostingTQ is one.

The takeaway here, being, you can't retrieve the payload from the  
Similarity class.  You can only get payloads via the TermPositions  
object.

-Grant

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org