code: package zemberek.corpus;
  
  import static zemberek.corpus.WebCorpus.parseDateTime;
  
  import java.time.LocalDateTime;
  
  public class CorpusDocument {
  
    int key;
    String id;
    String source;
    String content;
    LocalDateTime sourceDate;
    LocalDateTime processDate;
  
    public CorpusDocument(String id, String source, String content) {
      this.id = id;
      this.source = source;
      this.content = content;
    }
  
    public CorpusDocument(String id, String source, String content, LocalDateTime sourceDate,
        LocalDateTime processDate) {
      this.id = id;
      this.source = source;
      this.content = content;
      this.sourceDate = sourceDate;
      this.processDate = processDate;
    }
  
    public static CorpusDocument fromWebDocument(WebDocument d) {
      String content = String.join("\n", d.lines);
      return
          new CorpusDocument(
              d.id,
              d.source,
              content,
              parseDateTime(d.crawlDate),
              parseDateTime(d.crawlDate));
    }
  
    public void setKey(int key) {
      this.key = key;
    }
  }
  