2.7.3. 提供程序实用程序类

public interface Providers {
  <T> MessageBodyReader<T> getMessageBodyReader(Class<T> type, Type genericType, Annotation annotations[], MediaType mediaType);
  <T> MessageBodyWriter<T> getMessageBodyWriter(Class<T> type, Type genericType, Annotation annotations[], MediaType mediaType);
  <T extends="" throwable=""> ExceptionMapper<T> getExceptionMapper(Class<T> type);
  <T> ContextResolver<T> getContextResolver(Class<T> contextType, MediaType mediaType);
}

@Provider
@Consumes("multipart/fixed")
public class MultipartProvider implements MessageBodyReader {

  private @Context Providers providers;
  ...
}