CandidateSearch.java

private Predicate createAdvancedSearchQuery(Long maxPrice, Long minPrice, Integer beds, Integer baths, String province) {
        QProperty property = QProperty.property;

        BooleanBuilder booleanBuilder = new BooleanBuilder();

        if(maxPrice != null && minPrice != null) {
            booleanBuilder.and(property.price.between(minPrice, maxPrice));
        } else if (maxPrice != null) {
            booleanBuilder.and(property.price.loe(maxPrice));
        } else if (minPrice != null) {
            booleanBuilder.and(property.price.goe(minPrice));
        }

        if(beds != null){
            booleanBuilder.and(property.beds.eq(beds));
        }

        if(baths != null){
            booleanBuilder.and(property.baths.eq(baths));
        }

        if(!StringUtils.isEmpty(province)) {
            booleanBuilder.and(property.provinces.contains(Province.valueOf(province)));
        }

        return booleanBuilder.getValue();
    }