Example usage for org.apache.lucene.queries.function FunctionValues doubleVal

Introduction

In this page you can find the example usage for org.apache.lucene.queries.function FunctionValues doubleVal.

Prototype

public void doubleVal(int doc, double[] vals) throws IOException 

Source Link

Usage

From source file:org.apache.solr.search.function.distance.HaversineFunction.java

License:Apache License

/**
 * @param doc  The doc to score/*ww w.  j  av a  2s .  c o  m*/
 * @return The haversine distance formula
 */
protected double distance(int doc, FunctionValues p1DV, FunctionValues p2DV) {

    double[] p1D = new double[2];
    double[] p2D = new double[2];
    p1DV.doubleVal(doc, p1D);
    p2DV.doubleVal(doc, p2D);
    double y1;
    double x1;
    double y2;
    double x2;
    if (convertToRadians) {
        y1 = p1D[0] * DistanceUtils.DEGREES_TO_RADIANS;
        x1 = p1D[1] * DistanceUtils.DEGREES_TO_RADIANS;
        y2 = p2D[0] * DistanceUtils.DEGREES_TO_RADIANS;
        x2 = p2D[1] * DistanceUtils.DEGREES_TO_RADIANS;
    } else {
        y1 = p1D[0];
        x1 = p1D[1];
        y2 = p2D[0];
        x2 = p2D[1];
    }
    return DistanceUtils.distHaversineRAD(y1, x1, y2, x2) * radius;
}

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From source file:org.apache.solr.search.function.distance.SquaredEuclideanFunction.java

License:Apache License

/**
 * @param doc The doc to score//from  ww  w.  j av  a2  s . com
 */
@Override
protected double distance(int doc, FunctionValues dv1, FunctionValues dv2) {

    double[] vals1 = new double[source1.dimension()];
    double[] vals2 = new double[source1.dimension()];
    dv1.doubleVal(doc, vals1);
    dv2.doubleVal(doc, vals2);

    return DistanceUtils.distSquaredCartesian(vals1, vals2);
}

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From source file:org.apache.solr.search.function.distance.VectorDistanceFunction.java

License:Apache License

/**
 * Calculate the distance// ww  w .ja v  a  2 s.c  o m
 *
 * @param doc The current doc
 * @param dv1 The values from the first MultiValueSource
 * @param dv2 The values from the second MultiValueSource
 * @return The distance
 */
protected double distance(int doc, FunctionValues dv1, FunctionValues dv2) {
    //Handle some special cases:
    double[] vals1 = new double[source1.dimension()];
    double[] vals2 = new double[source1.dimension()];
    dv1.doubleVal(doc, vals1);
    dv2.doubleVal(doc, vals2);
    return DistanceUtils.vectorDistance(vals1, vals2, power, oneOverPower);
}

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