generateForAnnotatedElement method

@override FutureOr<String> generateForAnnotatedElement(Element element, ConstantReader annotation, BuildStep buildStep)

Implement to return source code to generate for element.

This method is invoked based on finding elements annotated with an instance of T. The annotation is provided as a ConstantReader.

Supported return values include a single String or multiple String instances within an Iterable or Stream. It is also valid to return a Future of String, Iterable, or Stream.

Implementations should return null when no content is generated. Empty or whitespace-only String instances are also ignored.

Implementation

@override
FutureOr<String> generateForAnnotatedElement(
  Element element,
  ConstantReader annotation,
  BuildStep buildStep,
) async {
  if (element is! ClassElement) {
    throw InvalidGenerationSourceError(
        'Generator cannot target `${element.displayName}`.');
  }

  final buffer = StringBuffer();

  for (final accessor
      in element.accessors.where((f) => f.isStatic && f.isGetter)) {
    if (_typeCheckers.jsonSchemaChecker.hasAnnotationOf(accessor)) {
      final schema = _schemaGenerator.generateSchema(element);
      final name = await _getRedirectedVariableName(accessor, buildStep);
      if (name == null) {
        throw InvalidGenerationSourceError(
            'Failed to extract redirected variable name for ${accessor.displayName}.');
      }
      _writeSchemaToBuffer(buffer, name, accessor.returnType, schema);
    }
    // Add conditions for other schema types here
  }
  return buffer.toString();
}