Question

I’m trying to create this json object in java and struggling:

{
    "notification": {
        "message": "test",
        "sound": "sounds/alarmsound.wav",
        "target": {
            "apps": [
                {
                    "id": "app_id",
                    "platforms": [
                        "ios"
                    ]
                }
            ]
        }
    },
    "access_token": "access_token"
}

Any assistance in how someone would create that in java would be appreciated!

Answer 1

If you really are looking into creating JSON objects, Jackson has all you want:

final JsonNodeFactory factory = JsonNodeFactory.instance;

final ObjectNode node = factory.objectNode();

final ObjectNode child = factory.objectNode(); // the child

child.put("message", "test");

// etc etc

// and then:

node.set("notification", child); // node.put(String, ObjectNode) has been deprecated

The resulting node is an ObjectNode, which inherits JsonNode, which means you get all of JsonNode‘s niceties:

• a sensible .toString() representation;
• navigation capabilities (.get(), .path() — GSON has no equivalent for that, in particular not .path(), since it cannot model a node that is missing);
• MissingNode to represent a node that isn’t there, and NullNode to represent JSON null, all of which inherit JsonNode (GSON has no equivalent for that — and all of JsonNode‘s navigation methods are also available on such nodes);
• and of course .equals()/.hashCode().