This is getting beyond my level of expertise, but I'll have a go at your questions. Hopefully someone better informed will step in with corrections or confirmation.
> ... > The application calls the *writer.addDocument(d);* method and in this > process the *lengthNorm(String fieldName, int numTerms)* method is called. > I can extend the *DefaultSimilarity* class and override the > *lengthNorm*method, but how can I explicitly specify the > *numTerms* value? I don't know that you can, but you don't have to use the value passed in. > ... > Does *computeNorm* method is called for every field or is it only called for > analyzed fields? All indexed fields, at a guess. Which can be analyzed or not. > The order we call *addDocument* and the order the *computeNorm *method is > called is the same ? Probably. > Is there is a possibility that I can access the *Document* object inside the > *Similiarity* class ? Not that I know of via API calls. If you had your own Similarity implementation, and methods are called in the order you expect, you could add a setDoc(Document) method and/or a setCalcValue(n) method and use them as you wished in your custom computeNorm() or lengthNorm() code. -- Ian. > On Mon, Jun 13, 2011 at 3:09 PM, Ian Lea <ian....@gmail.com> wrote: > >> org.apache.lucene.search.Similarity would be the place to look, >> specifically computeNorm(String field, FieldInvertState state). There >> is comprehensive info in the javadocs. Note that values are >> calculated at indexing and stored in the index encoded, with some loss >> of precision. >> >> >> -- >> Ian. >> >> On Mon, Jun 13, 2011 at 7:31 AM, Lahiru Samarakoon <lahir...@gmail.com> >> wrote: >> > Hi All, >> > >> > I want to change the length normalization calculation specific to my >> > application. By changing the "*number of terms*" according to my >> > requirement. The "*StandardTokenizer*" works perfectly for my >> application, >> > However, the *number of terms* calculated by the tokenizer is not the >> > effective number of terms for the application. I have an mechanism to >> > calculate that value and I need to know how can I apply that value in >> length >> > normalization calculations. >> > >> > Please advice. >> > >> > Thank you, >> > >> > Best Regards, >> > Lahiru. >> > >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> For additional commands, e-mail: java-user-h...@lucene.apache.org >> >> > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
