@JsonIdentityInfo on array

Question

I just recently upgraded to Jackson 2.0.5 and discovered this new attribute called @JsonIdentityInfo that allows you do define an object once, but then have the serializer create references to that single object, without creating duplicates every time its seen. Quite nice actually. http://wiki.fasterxml.com/JacksonFeatureObjectIdentity

The documentation states that this feature does not yet currently support arrays. I was wondering if anyone knows of any other approach to this? I have a snippet of JSON that might look like this:

{
    "people":[ 
       { "@id" = 1, "name"="bill"},
       { "@id" = 2, "name"="joe"}
    ],
    "friends": [1,2]

}

I'd like to have "friends" inflate with the array of "person" objects, in the same way that "people" will. Does anyone know of a way to do this?

StaxMan · Accepted Answer · 2012-08-18 17:17:48Z

1

What you can do is to use a wrapper POJO that only contains array or List. That POJO can use identity-handling normally. It adds one extra level, but should work nicely.

If you would like to see support for List/array types, make sure to file a RFE at Github. While non-trivial to implement, it's possible, just quite a bit of work (which is why original implementation focused on things expressed as JSON Objects).

answered Aug 18, 2012 at 17:17

StaxMan

117k35 gold badges215 silver badges241 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Taity · Accepted Answer · 2013-09-01 16:37:29Z

1

you can do that with JSOG JS library: https://github.com/jsog/jsog, but you need serialize data like:

{
"people":[ 
   { "@id" = 1, "name"="bill"},
   { "@id" = 2, "name"="joe"}
],
"friends": [ {@ref = 1}, {@ref = 2}]

}

or modify JSOG Library.

answered Sep 1, 2013 at 16:37

Taity

541 silver badge4 bronze badges

Collectives™ on Stack Overflow

@JsonIdentityInfo on array

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related