import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.logging.Logger;

public class ArticleRepository11 {
    private static final Logger logger = Logger.getLogger(ArticleRepository11.class.getName());
    private final List<Article11> articles = new ArrayList<>();

    public void add(Article11 article) {
        if (article == null) {
            logger.severe("添加失败：文章对象为 null");
            throw new IllegalArgumentException("文章对象不能为空");
        }
        articles.add(article);
        logger.info("成功添加文章：" + article.getTitle());
    }

    public void addAll(List<Article11> newArticles) {
        if (newArticles == null) {
            logger.severe("批量添加失败：传入列表为 null");
            throw new IllegalArgumentException("文章列表不能为空");
        }
        int successCount = 0;
        for (Article11 article : newArticles) {
            if (article == null) {
                logger.warning("列表中存在空对象，已跳过");
                continue;
            }
            articles.add(article);
            successCount++;
        }
        logger.info("批量添加完成，共成功添加 " + successCount + " 篇文章");
    }

    public List<Article11> getAll() {
        return Collections.unmodifiableList(articles);
    }

    public int size() {
        return articles.size();
    }

    public void clear() {
        logger.info("清空文章集合，原有数量：" + articles.size());
        articles.clear();
    }
}