Examples with AnnotationMetadata io.micronaut.core.annotation.AnnotationMetadata used on opensource projects

Example 6 with AnnotationMetadata

use of io.micronaut.core.annotation.AnnotationMetadata in project micronaut-kafka by micronaut-projects.

the class KafkaMessageHeaderBinder method bind.

@Override
public BindingResult<T> bind(ArgumentConversionContext<T> context, ConsumerRecord<?, ?> source) {
    Headers headers = source.headers();
    AnnotationMetadata annotationMetadata = context.getAnnotationMetadata();
    // use deprecated versions as that is what is stored in metadata
    String name = annotationMetadata.stringValue(MessageHeader.class, "name").orElseGet(() -> annotationMetadata.stringValue(MessageHeader.class).orElse(context.getArgument().getName()));
    Iterable<org.apache.kafka.common.header.Header> value = headers.headers(name);
    if (value.iterator().hasNext()) {
        Optional<T> converted = ConversionService.SHARED.convert(value, context);
        return () -> converted;
    } else if (context.getArgument().getType() == Optional.class) {
        // noinspection unchecked
        return () -> (Optional<T>) Optional.of(Optional.empty());
    } else {
        // noinspection unchecked
        return BindingResult.EMPTY;
    }
}