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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchlib.ranking.features.fieldmatch;
import com.yahoo.searchlib.ranking.features.fieldmatch.QueryTerm;
import java.util.Arrays;
/**
* A query: An array of the QueryTerms which searches the field we are calculating for,
* <p>
* In addition the sum of the term weights of <i>all</i> the query terms can be set
* explicitly. This allows us to model the matchWeight rank feature of a field as dependent of
* the weights of all the terms in the query.
*
* @author bratseth
*/
public class Query {
private QueryTerm[] terms;
private int totalTermWeight=0;
private float totalSignificance=0;
public Query(String query) {
this(splitQuery(query));
}
/** Creates a query with a list of query terms. The query terms are not, and must not be subsequently modified */
public Query(QueryTerm[] terms) {
this.terms=terms;
for (QueryTerm term : terms) {
totalTermWeight+=term.getWeight();
totalSignificance+=term.getSignificance();
}
}
private static QueryTerm[] splitQuery(String queryString) {
String[] queryTerms=queryString.split(" ");
QueryTerm[] query=new QueryTerm[queryTerms.length];
for (int i=0; i<query.length; i++)
query[i]=new QueryTerm(queryTerms[i]);
return query;
}
/** Returns the query terms we are calculating features of */
public QueryTerm[] getTerms() { return terms; }
/**
* Returns the total term weight for this query.
* This is the sum of the weights of the terms if not set explicitly, or if set explicitly a higher
* number which also models a query which also has terms going to other indexes.
*/
public int getTotalTermWeight() { return totalTermWeight; }
public void setTotalTermWeight(int totalTermWeight) { this.totalTermWeight=totalTermWeight; }
/**
* Returns the total term significance for this query.
* This is the sum of the significance of the terms if not set explicitly, or if set explicitly a higher
* number which also models a query which also has terms going to other indexes.
*/
public float getTotalSignificance() { return totalSignificance; }
public void setTotalSignificance(float totalSignificance) { this.totalSignificance=totalSignificance; }
public String toString() {
return "query: " + Arrays.toString(terms);
}
}
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