blazingwolf7 at gmail
Jul 3, 2008, 7:37 PM
Post #5 of 5
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I am trying to retrieve the contentLength and the URL of each document from
the index without continuously using IndexReader, eg:
reader.document.get("ur");
I am trying to find a way to retrieve all this value and stored it into an
array by using the IndexReader only once or twice. I thought maybe I can
store some extra value into the .frq file then I will have no need to
continuously use the reader. Anyone can provide other suggestion? Thanks
Yonik Seeley wrote:
>
> On Thu, Jul 3, 2008 at 4:03 AM, blazingwolf7 <blazingwolf7[at]gmail.com>
> wrote:
>> Ah, thanks! I am clear now. Have to change tactics to achieve what I
>> need.
>> Which class during indexing time will create the .frq file?
>
> DocumentsWriter (called from IndexWriter).
>
>> If possible, I want to add an extra value into it so that I can retrieve
>> the
>> information during the searching process. Thank
>
> Look at payloads first.
> What problem are you trying to solve? Someone may have an easier
> approach for you if payloads doesn't work.
>
> -Yonik
>
>
>
>>
>> Yonik Seeley wrote:
>>>
>>> On Wed, Jul 2, 2008 at 10:30 PM, blazingwolf7 <blazingwolf7[at]gmail.com>
>>> wrote:
>>>> What I am missing is that I fail to locate the class that perform the
>>>> actual
>>>> comparison to determine if a query match any term in a document.
>>>
>>> You need to understand the inverted index format. Documents that
>>> match a term is determined at index time, not at query time. The .frq
>>> file lists all documents that match each term.
>>>
>>> TermDocs iterates over all documents that match the term by reading
>>> the .frq file.
>>>
>>> -Yonik
>>>
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