getContributorCounts method in an imperative style

getContributorCountsImperative.java

public List<ContributorCount> getContributorCounts() {
    List<ArticleView> articleViews = getArticleViews();

    //First iterate over the articles counting the occurrences of
    //each contributor
    HashMap<String, Integer> contributorCounts = new HashMap<String, Integer>();
    for (ArticleView articleView : articleViews) {
        Integer count = contributorCounts.get(articleView.contributor);
        if (count == null)
            contributorCounts.put(articleView.contributor, 1);
        else
            contributorCounts.put(articleView.contributor, count + 1);
    }

    //Now iterate over the results filtering out the contributors who
    //only appear once and converting the results to the required output type
    List<ContributorCount> result = new ArrayList<ContributorCount>();
    for (String contributor : contributorCounts.keySet()) {
        int count = contributorCounts.get(contributor);
        if (count > 1)
            result.add(new ContributorCount(contributor, contributorCounts.get(contributor)));
    }

    return result;
}