On Fri, Oct 9, 2009 at 3:07 PM, scott w <scottbl...@gmail.com> wrote:
> Example Document:
> model_1_score = 0.9
> model_2_score = 0.3
> model_3_score = 0.7
>
> I want to be able to pass in the following map at query time:
> {model_1_score=0.4, model_2_score=0.7} and have that map get used as input
> to a custom score function that would look like: 0.9*0.4 + 0.3*0.7, so that
> it is summing over the specified fields and multipling the indexed weight
> by
> the query time weight.
>
Ok, now I think I get it. You do have some index-time floats, and
query-time
boosts.
You should be able to do a normal BooleanQuery with three OR'ed together
ValueSourceQueries boosted by input weights, it seems, as that is the way
they work - they take the values in different fields and use them as the
score,
and the normal boosting technique will use query time weigting.
To get good performance with a ValueSourceQuery, I'd suggest using a
FieldCacheSource for speedier processing:
-----------
String field = "model_1_score";
float runTimeBoost = 0.5;
ValueSource model1Source = new FloatFieldSource(field,
new FieldCache.FloatParser() {
public float parseFloat(String s) { return Float.parseFloat(s); }
});
Query model1Q = new ValueSourceQuery(model1Source);
model1Q.setBoost(runTimeBoost);
// do this for model2 and model3 as well...
BooleanQuery bq = new BooleanQuery();
bq.add(model1Q, Occur.SHOULD);
bq.add(model2Q, Occur.SHOULD);
bq.add(model3Q, Occur.SHOULD);
---------------
I haven't tried this code, but it seems like this is what you are trying
to do...
-jake
