generateForAnnotatedElement method
Future<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
Future<String> generateForAnnotatedElement(
Element element, ConstantReader annotation, BuildStep buildStep) async {
if (element.kind != ElementKind.CLASS) {
throw 'Only classes can be annotated with a @Serializable() annotation.';
}
var ctx = await buildContext(element as ClassElement, annotation, buildStep,
buildStep.resolver, true);
if (ctx == null) {
log.fine('Invalid builder context');
throw 'Invalid builder context';
}
var lib = Library((b) {
generateClass(ctx, b, annotation);
});
var buf = lib.accept(DartEmitter(useNullSafetySyntax: true));
return buf.toString();
}