getCompareValue

    public int getCompareValue(String raceID) {
        int value = 0;
        boolean hasTerraformable = hasTerraformable(raceID);
        boolean isColonizable = isColonizable(raceID);
        double inhabitants = getCurrentInhabitants();
        double maxCurrentInhabitants = getCurrentMaxInhabitants();
        int maxInhabitantsMod = (int) (getMaxInhabitants() - maxCurrentInhabitants);
        if(isColonizable || hasTerraformable) {
            value += maxInhabitantsMod;
            if(isFree())
                value++;
        }
        if (isColonizable)
            value++;
        if (isColonizable && !hasTerraformable) //all terraformed so it's a clear colonization target
            value += 5;
        if (hasTerraformable && (inhabitants / maxCurrentInhabitants > 0.9f)) //prioritize systems that are near the current population limit
            value += 50;
        if (isColonizable && (inhabitants > 0)) //highest priority to systems which have terraformed planets and are already colonized
            value += 100;
        return value;
    }