Hi All,

I need some help on dynamic boosting.
As per the documentation it works as below:

public enum PersonType {
NORMAL,
VIP
}
@Entity
@Indexed
@DynamicBoost(impl = VIPBoostStrategy.class)
public class Person {
private PersonType type;

// ...
}
public class VIPBoostStrategy implements BoostStrategy {
public float defineBoost(Object value) {
Person person = ( Person ) value;
if ( person.getType().equals( PersonType.VIP ) ) {
return 2.0f;
}
else {
return 1.0f;
}
}
}


I have some different requirement, I want to boost a field depending upon match("perfect match" or "partial match").
For Example consider I am searching for "India" on field called "country" and there are three matching records in the table with value of "country" field as follows:
1. India
2. Indiana
3. Indiana Town

Here I call 1 as "perfect match" and 2 ,3 as "partial match". For "perfect match" I want to give boost 2.0f and for "partial match" I want to give boost "1.5f".

Can somebody help in achieving this.
Any help will be appreciated.

Thanks,
Akash

Hi,
considerations like that one are applied automatically, although the Lucene engine is going to be much smarter than your example as it will also consider how each term is actually relevant compared to the full set of terms in your index.

If you really want it to just use 1,5f and 2.0f exactly, then you should customize the Similarity implementation:
http://docs.jboss.org/hibernate/search/5.0/reference/en-US/html_single/#_customizing_lucene_s_scoring_formula

But before doing that, I would suggest to experiment with a full text query on your specific example using a projection on the EXPLANATION: it will print exactly which formula and which scores it will use for "India" vs "Indiana" vs "Indiana Town", etc..

See: FullTextQuery.EXPLANATION in http://docs.jboss.org/hibernate/search/5.0/reference/en-US/html_single/#projections