[hibernate-dev] Search: Dynamic Document boosting
emmanuel at hibernate.org
Thu Apr 30 05:32:44 EDT 2009
What's your use case?
I am not against that feature but I don't think it covers all use cases:
- I want a higher boost for more recent documents
- I change priority in my categories depending on the marketing mood
Said otherwise, can have a true dynamic boost defined at query time,
not at indexing time.
I think Solr has something named FunctionQuery that can do that.
On Apr 29, 2009, at 16:47, Sanne Grinovero wrote:
> I'm currently needing to be able to define a per-entity INSTANCE
> different Boost, not just the type.
> Currently I could obtain this functionality by using a custom
> classbridge, but the entity is quite complex and building my own
> classbridge I will have to map all fields myself loosing the
> flexibility of annotations for the current type and
> all @IndexedEmbedded.
> I'd like to add a new parameter to @Boost; currently it has a float
> mandatory value,
> I'd like to add a new parameter:
> Class<BoostScorer> impl();
> where BoostScorer is an interface having something like
> public float score(Object value);
> The annotation would default to an implementation returning constant
> This would have an interaction with the existing "value" parameter:
> IMHO they should
> multiply each other, so I'd change the existing value to also have a
> default of 1.0f
> and people might want to change one or both values.
> Setting both values might be useful to reuse the same impl on
> different types/fields
> and still be able to statically scale the result from the
> score(Object) function, without having to
> rewrite a new implementation.
> What do you think?
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