jackson 2 object to json ignore lazy loading

Asked Jul 10 '17 at 22:36

Active Jul 10 '17 at 22:51

Viewed 540 times

I am using jackson 2 to parse an object to json format I am having problem when I parse lazy loading fields. I want to get a null reference if the object cannot be loaded.

How can I do that?

I want to discuss with you a solution and I want to know if there is a problem when I use it?

I have found that during parsing jackson uses getters method to get attributes So my solution is to modify the getters methods of lazy loading fields suppose that post is a lazy loaded field this is the getter of that fields

public Collection<Post> getPosts() {
        try{
            posts.size();
            return posts;
        }
        catch (Exception e){

        }
        return null;
    }

This solution is working fine but I don't know if it will cause future problems or not. We should also use @JsonInclude(JsonInclude.Include.NON_NULL) to ignore null fields.

edited Jul 10 '17 at 22:51

cнŝdk

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asked Jul 10 '17 at 22:36

Mohamed Amine Ouali

Why don't you just use `@JsonIgnore` annotation with this field? – cнŝdk Jul 10 '17 at 22:48
if I use @JsonIgnore the fields will always be ignored. but what I want is that if the field can be loaded than parse it else don't. – Mohamed Amine Ouali Jul 10 '17 at 22:54
In that case you can stick with using the solution you posted. I think there's no problem to use it. – cнŝdk Jul 10 '17 at 22:56

jackson 2 object to json ignore lazy loading

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