Importing a ProjectParameters.json

FlowGraph can work in both directions. Besides generating a Kratos ProjectParameters.json from a graph, it can reconstruct a graph from an existing ProjectParameters.json — useful for inspecting, editing or documenting cases you already have.

This is handled by the "from-JSON converter" in public/js/extensions/load_project_parameters.js, which adds LGraph.prototype.configure_project_parameters() and a KratosProblemParametersBuilder class.

How it works

When you load a Kratos ProjectParameters.json, the builder:

1. Detects node types from the JSON structure. Well-known keys map to nodes — problem_data, solver_settings, linear_solver_settings, model_import_settings, the orchestrator and the analysis stages each become the corresponding FlowGraph node.
2. Recreates each node with its widget values populated from the JSON (problem name, parallel type, echo level, solver options, linear-solver parameters, and so on).
3. Auto-positions the reconstructed nodes into columns so the graph is readable immediately.
4. Auto-connects the nodes to reflect the references in the original file (solver → linear solver, stage → solver → problem data, etc.).

The result is a graph equivalent to the input case, which you can then edit visually and re-export.

Typical workflow

1. Open FlowGraph.
2. Load your existing ProjectParameters.json through the import entry point.
3. Review the reconstructed graph, adjust widgets or connections as needed.
4. Click Generate and open the Viewer to confirm the regenerated JSON.
5. Export a case to produce an updated, runnable bundle.

Round-tripping

Because import and export are symmetric, FlowGraph is a convenient editor for cases authored by hand or by other tools — import, tweak visually, and export back to JSON.

Related

• Exporting a Case — the reverse direction.
• Analysis Stages & Orchestrators — the top-level structure the importer reconstructs.