Extending SpringBootStreamHandler for SpringCloudFunction

Question

I'm working in a project using Spring Cloud Function for AWS Lambda. I noticed that there are few examples on extending SpringBootRequestHandler for handling specific type of input and output.

But, my project has a requirement where the input json object is random. Thus, I'm unable define a Java class, which is mandatory for the SpringBootRequestHandler implementation.

Currently, my handler class extending SpringBootStreamHandler looks something like below:

public class CustomHandler extends SpringBootStreamHandler {

  @Autowired
  private BeanA beanA;

  @Override
  public void handleRequest(InputStream input, OutputStream output, Context context) throws IOException {
    // Call initialize to autowire beanA
    this.initialize(); 
    // Business logic to parse partial of json input into an object.
    ....
  }
}

But, is there a way which I can abstract the business logic to another class extending Function which is similar to the SpringBootRequestHandler implementation?

@Component
public class CustomFunction extend Function<?,?> {
  // Business logic
  ........
}