+ * @return the ID
+ */
+ abstract protected String getArticleId(Document doc, Element article);
+
+ /**
+ * The article title to display.
+ *
+ * @param doc
+ * the main document for the current category
+ * @param article
+ * the article to look into
+ *
+ * @return the title
+ */
+ abstract protected String getArticleTitle(Document doc, Element article);
+
+ /**
+ * The optional article author.
+ *
+ * @param doc
+ * the main document for the current category
+ * @param article
+ * the article to look into
+ *
+ * @return the author
+ */
+ abstract protected String getArticleAuthor(Document doc, Element article);
+
+ /**
+ * The optional article date.
+ *
+ * @param doc
+ * the main document for the current category
+ * @param article
+ * the article to look into
+ *
+ * @return the date
+ */
+ abstract protected String getArticleDate(Document doc, Element article);
+
+ /**
+ * the optional article category.
+ *
+ * @param doc
+ * the main document for the current category
+ * @param article
+ * the article to look into
+ * @param currentCategory
+ * the currently listed category if any (can be NULL)
+ *
+ * @return the category
+ */
+ abstract protected String getArticleCategory(Document doc, Element article,
+ String currentCategory);
+
+ /**
+ * the optional details of the article (can replace the date, author and
+ * category, for instance).
+ *
+ * @param doc
+ * the main document for the current category
+ * @param article
+ * the article to look into
+ *
+ * @return the details
+ */
+ abstract protected String getArticleDetails(Document doc, Element article);
+
+ /**
+ * The (required) {@link URL} that points to the news page on the supported
+ * website.
+ *
+ * @param doc
+ * the main document for the current category
+ * @param article
+ * the article to look into
+ *
+ * @return the internal {@link URL}