A page in my Wicket app has a contructor which should access an injected
repository, but the repository is injected not until construction is complete..
public class ArticlePage extends WebPage
{
@SpringBean
private static ArticleRepository repository; // initialized after
construction!
private Article article;
public ArticlePage()
{
this(repository.findByName("index")); // NullPointerException here
}
public ArticlePage(Article article)
{
add(new Label("name", new PropertyModel(article, "name")));
add(new Label("contentHtml", new PropertyModel(article,
"contentHtml")));
add(new Label("revision", new PropertyModel(article, "revision")));
add(new Label("revisionDate", new PropertyModel(article,
"revisionDate")));
add(new Label("author", new PropertyModel(article, "author")));
}
}
This code looks for the default page in a database an passes it to the real
constructor. But this is only a footnote because the problem is more general.
How do I access injected objects within a constructor? When I try to access
"repository" I get a NullPointerException because this field is initialized
after construction. The reason is that the Spring integration in Wicket does
not allow constructor injection.
How can solve this problem? Is Wicket+Spring (or DI in general) really a good
combination? It seems again and again improper to me.
Thanks for help!
Christian
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