Functional Pipeline Composition in Spring Services

@Service
public class TextSanitizerService {
    private final Function<String, String> sanitizationPipeline;
 
    public TextSanitizerService() {
        Function<String, String> trimWhitespace = String::strip;
        Function<String, String> removeHtml = text -> text.replaceAll("<[^>]*>", "");
        Function<String, String> normalizeEscapes = text -> text.replace("\t", " ");
 
        this.sanitizationPipeline = trimWhitespace
                .andThen(removeHtml)
                .andThen(normalizeEscapes);
    }
 
    public String sanitize(String rawInput) {
        return Optional.ofNullable(rawInput)
                .map(sanitizationPipeline)
                .orElse("");
    }
}