generateForAnnotatedElement method

  1. @override
Future<String> generateForAnnotatedElement(
  1. Element element,
  2. ConstantReader annotation,
  3. 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
Future<String> generateForAnnotatedElement(
    Element element, ConstantReader annotation, BuildStep buildStep) async {
  if (element is ClassElement) {
    var ctx = await buildOrmContext({}, element, annotation, buildStep,
        buildStep.resolver, autoSnakeCaseNames);
    if (ctx == null) {
      throw 'Invalid ORM build context';
    }

    var lib = buildOrmLibrary(buildStep.inputId, ctx);

    return lib.accept(DartEmitter(useNullSafetySyntax: true)).toString();
  } else {
    throw 'The @Orm() annotation can only be applied to classes.';
  }
}