package interfaces.a;

import java.util.Properties;

public class FactorySpeedModel {

public static SpeedModel generateSpeedModel(Properties drivingConditions) {

return new SpeedModelImpl(drivingConditions);

}

private static class SpeedModelImpl implements SpeedModel {

private Properties drivingConditions;

private SpeedModelImpl(Properties drivingConditions) {

this.drivingConditions = drivingConditions;

}

public double getSpeedMph(double timeSec, int weightPounds, int horsePower) {

String roadCondition = drivingConditions.getProperty("roadCondition", "Dry");

String tireCondition = drivingConditions.getProperty("tireCondition", "New");

double v = 2.0 * horsePower * 746;

v = v * timeSec * 32.174 / weightPounds;

return Math.round(Math.sqrt(v) * 0.68) - (roadCondition.equals("Dry") ? 2 : 5)

- (tireCondition.equals("New") ? 0 : 5);

}

}

}