Create an ObjectNode from JSON string

Question

How do I create a ObjectNode from a string using Jackson?

I tried:

ObjectNode json = new ObjectMapper().readValue("{}", ObjectNode.class);

But get

Exception in thread "main" com.fasterxml.jackson.databind.JsonMappingException: Conflicting setter definitions for property "type": jdk.nashorn.internal.ir.Symbol#setType(1 params) vs jdk.nashorn.internal.ir.Symbol#setType(1 params)

I want to be able to read a JSON string the add/modify some values.

Petah · Accepted Answer · 2015-05-06 22:16:34Z

11

You are using the wrong import.

It should be

com.fasterxml.jackson.databind.node.ObjectNode

Not:

jdk.nashorn.internal.ir.ObjectNode

answered May 6, 2015 at 22:16

Petah

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Comments

skaffman · Accepted Answer · 2015-05-06 22:20:38Z

11

Firstly, the error message suggests you're tying to build a jdk.nashorn.internal.ir.ObjectNode, whereas I'm guessing you actually intended to build a com.fasterxml.jackson.databind.node.ObjectNode (for Jackson 2.x). Check your imports.

However, if all you want to do is build an empty ObjectNode, then just use

JsonNodeFactory.instance.objectNode()

If for some reason you really want to do it by parsing an empty JSON object, then use this:

ObjectNode json = (ObjectNode) new ObjectMapper().readTree("{}");

But that's just unpleasant.

edited May 6, 2015 at 22:20

answered May 6, 2015 at 22:16

skaffman

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1 Comment

Petah Over a year ago

Thanks, yea I just noticed the import was wrong... sigh

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