Helper function to calculate 5 rating stars display (empty, half, full) based on an average rating value

RatingStarsTemplateRenderer.java

package com.kaput.portal.templaterenderer;

import io.quarkus.qute.TemplateEnum;
import io.quarkus.qute.TemplateExtension;

@TemplateExtension
public class RatingStarsTemplateRenderer {

    @TemplateEnum
    public enum StarStyleEnum {
        EMPTY,
        HALF,
        FULL
    }

    static StarStyleEnum[] getStarStylesByAverageRating(Float averageRating) {
        if (averageRating == null || averageRating.isNaN() || averageRating.isInfinite()) {
            return new StarStyleEnum[]{StarStyleEnum.EMPTY, StarStyleEnum.EMPTY, StarStyleEnum.EMPTY, StarStyleEnum.EMPTY, StarStyleEnum.EMPTY};
        }
        StarStyleEnum[] starStyles = new StarStyleEnum[5];
        int roundedDoubledSteps = Math.round(averageRating * 2);
        starStyles[0] = roundedDoubledSteps > 1 ? StarStyleEnum.FULL : roundedDoubledSteps == 1 ? StarStyleEnum.HALF : StarStyleEnum.EMPTY;
        starStyles[1] = roundedDoubledSteps > 3 ? StarStyleEnum.FULL : roundedDoubledSteps == 3 ? StarStyleEnum.HALF : StarStyleEnum.EMPTY;
        starStyles[2] = roundedDoubledSteps > 5 ? StarStyleEnum.FULL : roundedDoubledSteps == 5 ? StarStyleEnum.HALF : StarStyleEnum.EMPTY;
        starStyles[3] = roundedDoubledSteps > 7 ? StarStyleEnum.FULL : roundedDoubledSteps == 7 ? StarStyleEnum.HALF : StarStyleEnum.EMPTY;
        starStyles[4] = roundedDoubledSteps > 9 ? StarStyleEnum.FULL : roundedDoubledSteps == 9 ? StarStyleEnum.HALF : StarStyleEnum.EMPTY;
        return starStyles;
    }

}