loadModuleParameters function

Future<void> loadModuleParameters(Module module, String filePath)

Loads parameters (weights) from a JSON file into a given Module.

The function reads a JSON array of doubles from the specified file and then iterates through the Module's parameters, updating their data field. It's crucial that the order of parameters when saving matches the order when loading.

module: The Module instance whose parameters are to be loaded. filePath: The path to the file from which the weights will be loaded.

Implementation

Future<void> loadModuleParameters(Module module, String filePath) async {
  final File file = File(filePath);

  if (!await file.exists()) {
    print('Error: File not found at $filePath');
    return;
  }

  try {
    final String jsonString = await file.readAsString();
    final List<dynamic> loadedData =
        jsonDecode(jsonString); // jsonDecode returns List<dynamic>

    final List<Value> moduleParameters = module.parameters();

    if (loadedData.length != moduleParameters.length) {
      print('Warning: Mismatch in number of parameters. '
          'Loaded: ${loadedData.length}, Expected: ${moduleParameters.length}');
    }

    // Update the data of each Value object in the module's parameters
    for (int i = 0; i < moduleParameters.length && i < loadedData.length; i++) {
      // Explicitly convert the dynamic value to double
      if (loadedData[i] is num) {
        moduleParameters[i].setData((loadedData[i] as num).toDouble());
      } else {
        print(
            'Error: Expected a number at index $i, but got ${loadedData[i].runtimeType}');
        // You might want to handle this error more robustly, e.g., throw an exception
      }
    }
    print('Weights successfully loaded from: $filePath');
  } catch (e) {
    print('Error loading weights from $filePath: $e');
  }
}