'Thymeleaf, how to add param with default value if it is missing?

I have two params, sortField and sortDir, this links adds a new one category and sets value to it.

       <ul th:with="urlBuilder=
${T(org.springframework.web.servlet.support.ServletUriComponentsBuilder).fromCurrentRequest()}"
    <li><a th:href="@{${urlBuilder.replaceQueryParam('category', 'snacks').build().toUriString()}}"

Is it possible to add also sortField and sortDir params with some default values using this link only if they are not already in the url?



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