Convert empty Optional<T> to HTTP 204 No Content in Jersey 2

OptionalResponseFilter.java

package my.rest.api

import javax.servlet.http.HttpServletResponse;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import java.io.IOException;
import java.util.Optional;

public class OptionalResponseFilter implements ContainerResponseFilter {

    @Override
    public void filter(ContainerRequestContext requestContext, ContainerResponseContext response) throws IOException {
        Object entity = response.getEntity();
        if(entity != null && isNonPresentOptionalValue(entity)) {
            response.setStatus(HttpServletResponse.SC_NO_CONTENT);
            response.setEntity(null);
        }
    }

    private boolean isNonPresentOptionalValue(Object entity) {
        return entity instanceof Optional<?> && !((Optional)entity).isPresent();
    }
}