[QGIS-Developer] GSoC 2026 Draft Proposal : JSON Handling Toolkit for the QGIS Processing Framework

[Nyall Dawson]

On Wed, 18 Mar 2026 at 14:23, Sionigdha Sadhukhan <snigdha.lee75 at gmail.com>
wrote:

> Subject: Re: GSoC 2026 Draft Proposal : JSON Handling Toolkit for the QGIS
> Processing Framework
>
> Hi Valentin,
> Thank you for the detailed feedback it's very helpful, and thanks for
> guiding through.
> The point about the two-headed proposal makes complete sense. I've already
> started reworking the proposal to make the JSON toolkit the clear centre of
> gravity. The ogrinfo typed parameter work is out I'm replacing those weeks
> with 2 additional JSON algorithms (JSONFromAttributes and MergeJSONArrays),
> bringing the total to 6 C++ algorithms that together cover the full JSON
> data lifecycle inside a QGIS model.On the QEP I understand the timing issue
> you raised and appreciate you flagging it. I'll draft the QEP during the
> community bonding period and submit it for community review before coding
> begins, so it doesn't block the proposal submission if that is fine?
> I also went through the Qt JSON documentation you linked. The
> implementation plan is built entirely around Qt's built-in JSON classes
> QJsonDocument, QJsonObject, QJsonArray, and QJsonValue no third-party
> libraries needed.
>

Can you flip that to use the utilities from QgsJsonUtils? Those use the
nlohmann library, which is faster then Qt's classes.

Nyall

>
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