GeoDistBoostQueryFactory.java

package won.matcher.solr.query.factory;

/**
 * Created by hfriedrich on 22.08.2016.
 */
public class GeoDistBoostQueryFactory extends SolrQueryFactory {
    private float latitude;
    private float longitude;
    private String solrLocationField;

    public GeoDistBoostQueryFactory(String solrLocationField, float latitude, float longitude) {

        this.latitude = latitude;
        this.longitude = longitude;
        this.solrLocationField = solrLocationField;
    }

    @Override
    protected String makeQueryString() {

        // calculate the inverse of the distance as a distance measure
        StringBuilder sb = new StringBuilder();
        sb.append("recip(geodist(").append(solrLocationField).append(",").append(latitude)
                .append(",").append(longitude).append("),5,100,100)");

        return sb.toString();
    }
}