RESTX issue 204 workaround

BsonJSR310Module.java

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.module.SimpleModule;
import de.undercouch.bson4jackson.BsonGenerator;
import de.undercouch.bson4jackson.serializers.BsonSerializer;

import java.io.IOException;
import java.time.Instant;
import java.util.Date;

public class BsonJSR310Module extends SimpleModule {
    public BsonJSR310Module() {
        super("BsonJSR310Module");

        addSerializer(Instant.class, new BsonSerializer<Instant>() {
            @Override
            public void serialize(Instant date, BsonGenerator bsonGenerator, SerializerProvider serializerProvider)
                    throws IOException {
                if (date == null) {
                    serializerProvider.defaultSerializeNull(bsonGenerator);
                } else {
                    bsonGenerator.writeDateTime(new Date(date.toEpochMilli()));
                }
            }
        });

        addDeserializer(Instant.class, new JsonDeserializer<Instant>() {
            @Override
            public Instant deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException, JsonProcessingException {
                Date date = (Date) jp.getEmbeddedObject();
                return Instant.ofEpochMilli(date.getTime());
            }
        });
    }
}

Java8Module.java

import org.jongo.Mapper;
import org.jongo.marshall.jackson.JacksonMapper;
import restx.factory.Module;
import restx.factory.Provides;
import restx.jackson.BsonJodaTimeModule;
import restx.jackson.Views;

import javax.inject.Named;

@Module(priority = -10)
public class Java8Module {
    @Provides
    @Named("Mapper")
    public Mapper mapper() {
        return new JacksonMapper.Builder()
                .registerModule(new BsonJodaTimeModule()) // to keep compatibility with joda time
                .registerModule(new BsonJSR310Module())
                .withView(Views.Private.class)
                .build();
    }
}