I have created a CMS in Wicket 1.3 and have run into a problem.
A CMS-page consits of multiple "articles". The articles are laid out on
the page using a ListView. Normally, an article just displays title,
text etc, so each article is represented by a simple Fragment that holds
the fields etc. A simplified version of populateItem looks like:
item.add(new ArticleFragment("article", "articleFragment",
item.getModel()));
Now I also need to support custom modules (Wicket Panels) as articles,
so I created a field in my article object that can contain a fully
qualified class name that should resolve to a Panel, and I do something
like:
if(article.getArticleType().equals(Article.ARTICLE_TYPE_PANEL_CONTROLLER)
&& !Strings.isEmpty(article.getControlsPanel())) {
Class panelClass = Class.forName(a.getControlsPanel());
Constructor panelConstructor = panelClass.getConstructor(String.class);
item.add((Panel) panelConstructor.newInstance("article"));
} else
item.add(new ArticleFragment("article", "articleFragment",
item.getModel()));
This works great. The problem arise when I need to maintain state in a
panel included this way. When the page rerenders because of a form
submit, the panel is recreated because of the actions in the
populateItem method of the page, and I'm screwed.
Any idea of how I could avoid this? I've started getting crazy ideas
about getting the panel from the pagemap or something and adding it back
via item.add(), but I don't know how to, or if that will blow up in my
face :)
Anyone? :)
-- Edvin
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