Article.java

Article.java

@AutoValue public abstract class Article implements Parcelable {
  //.....
  public static final ArticleTimestampComparator timestampComparator =
      new ArticleTimestampComparator();
  public static final ArticleAuthorComparator authorComparator =
      new ArticleAuthorComparator();
  public static final ArticleContentComparator contentComparator =
      new ArticleContentComparator();
  public static final ArticleCategoryComparator categoryComparator =
      new ArticleCategoryComparator();

  public int compare(Article article, Comparator<Article> articleComparator) {
    return articleComparator.compare(this, article);
  }

  public int compare(Article article) {
    return timestampComparator.compare(this, article);
  }

  public boolean areContentsTheSame(Article article) {
    return this.equals(article);
  }

  public boolean areItemsTheSame(Article article) {
    return this.id() == article.id();
  }
  //......
}