Nulls and Empty collections are stored in the database of my custom mapper - jackson

Question

I have a custom ObjectMapper that deserializes Product and Order objects. It works fine but it stores and returns nulls in the Mongodb database. Here is my configuration. In my implementation of the custom serializers, I return an empty list/map for empty collections.
import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.springframework.stereotype.Component;
import java.text.DateFormat;
import java.util.Locale;
#Component("retailObjectMapper")
public class RetailObjectMapper extends ObjectMapper {
public RetailObjectMapper() {
setDateFormat(DateFormat.getDateTimeInstance(DateFormat.DEFAULT,
DateFormat.DEFAULT, Locale.US));
SimpleModule module = new SimpleModule();
module.addDeserializer(Product.class,new ProductDeserializer(Product.class));
module.addDeserializer(Order.class,new OrderDeserializer(Order.class));
setSerializationInclusion(JsonInclude.Include.NON_NULL);
setSerializationInclusion(JsonInclude.Include.NON_EMPTY);
configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
registerModule(module);
}
}
Unfortuantely, the fields not populated return null and empty collections also return null. I have no idea why this is happening, help please.