Hi All,

I overrided DefaultSimiliarity,

public class OwnSimiliary extends DefaultSimilarity {

public float idf(int doFreq, int numDocs) {
return 1.0f;
}

public float lengthNorm(String fieldname, int numTerms) {
return 1.0f;
}
}

public class Vehicle {

@Field(index = Index.TOKENIZED, store = Store.YES)
@Boost(1.0f)
private String carType;

@IndexEmbedded
private Set<Car> car;
}

public class Car {

@Field(index = Index.TOKENIZED, store = Store.YES)
@Boost(5.0f)
private String name;
}


I use the explain to get score details when querying "Vehicle"

for field "carType", the fieldNorm return "1" if records are matched (this is right to me)

But for field, "car.name", the fieldNorm return "a strange value(big value)" if records are matched.

I thought the fieldNorm of car.name should return "1" but it is not.

Can someone explain it to me? or tell me whether I'm in right track and show me some ways to solve it.

Thanks heap.

Hi,

As far as i know the fieldNorm is defined as: getBoost(t.field in d) * lengthNorm(t.field in d)
This means the boost is a factor when calculating the field norm. Given that you use @Boost(5.0f) on
Car.name I would not expect the value to be 1.

--Hardy

Hi,

Let me explain more clearly,

Hi All,

I overrided DefaultSimiliarity,

public class OwnSimiliary extends DefaultSimilarity {

public float idf(int doFreq, int numDocs) {
return 1.0f;
}

public float lengthNorm(String fieldname, int numTerms) {
return 1.0f;
}
}

public class Vehicle {

@Field(index = Index.TOKENIZED, store = Store.YES)
@Boost(1.0f)
private String carType;

@IndexEmbedded
private Set<Car> car;
}

public class Car {

@Field(index = Index.TOKENIZED, store = Store.YES)
@Boost(5.0f)
private String name;
}


Let say, we have indexed data,

carType:toyota
car.name:corolla

CarType:hyundai
car.name:getz

CarType:mitsubishi
car.name:lancer

I have overriden the DefaultSimiliarity class.

let say, I search for carType:toyota, it matched and fieldNorm should be 1 (make sense to me).

Again, if I search for car.name:corolla, it matched and fieldNorm should be 5 but hibernate search returns me a large value (it is puzzled me).

Is it because field norm calculation on embedded object is different from a normal way?

Thank you very much.