R Syed R Syed - 5 months ago 23
JSON Question

Removing elements

I've a particular JSON Node that corresponds to import org.codehaus.jackson.JsonNode, and not
import org.codehaus.jackson.map.JsonNode.

[
{
"givenName": "Jim",
"formattedName": "jimJackson",
"familyName": null,
"middleName": "none",
"honorificPrefix": "mr",
"honorificSuffix": "none"
},
{
"givenName": "john",
"formattedName": "johnLasher",
"familyName": null,
"middleName": "none",
"honorificPrefix": "mr",
"honorificSuffix": "none"
},
{
"givenName": "carlos",
"formattedName": "carlosAddner",
"familyName": null,
"middleName": "none",
"honorifiPrefix": "mr",
"honorificSuffix": "none"
},
{
"givenName": "lisa",
"formattedName": "lisaRay",
"familyName": null,
"middleName": "none",
"honorificPrefix": "mrs",
"honorificSuffix": "none"
},
{
"givenName": "bradshaw",
"formattedName": "bradshawLion",
"familyName": null,
"middleName": "none",
"honorificPrefix": "mr",
"honorificSuffix": "none"
},
{
"givenName": "phill",
"formattedName": "phillKane",
"familyName": null,
"middleName": "none",
"honorificPrefix": "mr",
"honorificSuffix": "none"
},
{
"givenName": "Gabriel",
"formattedName": "gabrielMoosa",
"familyName": null,
"middleName": "none",
"honorificPrefix": "mr",
"honorificSuffix": "none"
}
]


I want to remove the "familyName" and "middleName" from all the JSON nodes of the above array. Is there any way to achieve this?

Answer

I haven't tested this, but I think something like this would do what you want:

import org.codehaus.jackson.node.ObjectNode;
// ...
for (JsonNode personNode : rootNode) {
    if (personNode instanceof ObjectNode) {
        ObjectNode object = (ObjectNode) personNode;
        object.remove("familyName");
        object.remove("middleName");
    }
}

You could also do this more efficiently using Jackon's raw parsing API, but the code would be a lot messier.

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