Unwrap an Optional only if it is present

Question

So currently I have

String uri = website.getUri();
Optional pageDetail = webClient.getDetailOfUri(uri);
String displayName;
String description;         


        

Answer 1

You could write:

String uri = website.getUri();
Optional pageDetail = webClient.getDetailOfUri(uri);
String displayName = pageDetail.map(PageDetail::getName).orElse(uri);
String description = pageDetail.map(PageDetail::getDescription).orElse("");

If the Optional is not set, map will return the same unset Optional. Otherwise, it will map it to an Optional containing the result of getName(). Then we can use orElse to return a default value when the Optional is unset.