How to add link in atom feed using spring 3, netbeans - spring

Question

Using spring3.2 and netbeans 7.2
Warning code :
#Override
protected List<Entry> buildFeedEntries(Map<String, Object> model,
HttpServletRequest request, HttpServletResponse response) throws Exception {
#SuppressWarnings("unchecked")
List<Feed_vo> contentList = (List<Feed_vo>) model.get("feedContent");
List<Entry> entries = new ArrayList<Entry>(contentList.size());
for (Feed_vo content : contentList) {
Entry entry = new Entry();
String date = String.format("%1$tY-%1$tm-%1$td", content.getCreatedDate());
entry.setId(String.format("tag:featuriz.com,%s:%d", date, content.getId()));
entry.setTitle(String.format("%s | on %s by %s",content.getTitle(), date, content.getAuthor()));
entry = setLink(content, entry);
entry.setUpdated(content.getCreatedDate());
Content summary = new Content();
summary.setValue(content.getSummary());
entry.setSummary(summary);
entries.add(entry);
}
return entries;
}
private Entry setLink(Feed_vo vo, Entry entry) {
ArrayList l = new ArrayList();
Link link = new Link();
link.setType("text/html");
link.setHref(vo.getUrl());
l.add(link);
entry.setAlternateLinks(l);
return entry;
}
This code works but Netbeans warning :
/home/sudhakar/**/CustomAtomViewer.java:72: warning: [unchecked] unchecked call to add(E) as a member of the raw type java.util.ArrayList
l.add(link);
1 warning
How to solve this warning.
Also inform me the correct format for atom and rss feed.
(How the output should look like. ie. output source).

Answer 1

Warnings solved by this code:
List<Link> v = new ArrayList<Link>();
Link link = new Link();
link.setType("text/html");
link.setHref(vo.getUrl());
v.add(link);
entry.setAlternateLinks(v);