generateForAnnotatedElement method

  1. @override
dynamic 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
generateForAnnotatedElement(
    Element element, ConstantReader annotation, BuildStep buildStep) {
  if (element is! ClassElement) {
    throw InvalidGenerationSourceError(
      '`@Endpoint` can only be used on classes.',
      element: element,
    );
  } else if (!element.isAbstract) {
    throw InvalidGenerationSourceError(
      '`${element.displayName}` must be an abstract class.',
      element: element,
    );
  }
  return EndpointCollector(path.basename(buildStep.inputId.path))
      .collect(element, annotation);
}