noah1209

<pre><code class="language-java">private SearchResponse createResponse(Document document) {
    String author = Optional.ofNullable(document.authors())
                            .filter(authors -> !authors.isEmpty())
                            .map(List::getFirst)
                            .orElse("Unknown Author");
    String publisher = Optional.ofNullable(document.publisher())
                               .filter(p -> !p.isBlank())
                               .orElse("Unknown Publisher");
    return SearchResponse.builder()
                         .title(document.title())
                         .author(author)
                         .publisher(publisher)
                         .pubDate(DateUtils.parseOffsetDateTime(document.dateTime()).toLocalDate())
                         .isbn(document.isbn())
                         .build();
  }</code></pre><p>요런식으로 createResponse 부분만 Optional을 이용해서 null 처리 해주면 될 것 같네요.</p>

noah1209

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