Serializable is needed

[dgallego]

Hi all, I have a question about JPA's entities (with hibernate as JPA provider)
Why do they need to implement Serializable interface?

I'm getting a "NoSerializableException" when working with some entities (not all, unfortunately)

Thanks :)

[norman.richards]

Well, you need to implement Serializable when you want to use them in a context that requires serialization. :)

There are a few places you could potentially need a serializable object. What exactly are you doing that causes you to run into the exception.

[dgallego]

I'm trying to outject a new "Category" instance from a method markes as a factory method.

"Category" is my entity POJO.

@Out(scope=ScopeType.CONVERSATION,required=false)
Category selectedCategory;

This is my factory method:

@Factory("categoryArticles")
public void CategoryViewer() {
selectedCategory = (Category)em.createQuery("from Category c where id = :categoryId").setParameter("categoryId", categoryId).getSingleResult();
}

So whenever I want to write an object to a Seam context, it has to be Serializable...

Thanks Norman!