Jackson / Jongo / MongoDB / JSR-310 reproducer

JacksonJSR310Reproducer.java

package jacksonrepro;

import java.net.UnknownHostException;
import java.time.Instant;
import java.util.Arrays;

import org.jongo.Jongo;
import org.jongo.Mapper;
import org.jongo.MongoCollection;
import org.jongo.marshall.jackson.JacksonMapper.Builder;

import com.fasterxml.jackson.datatype.jsr310.JSR310Module;
import com.mongodb.MongoClient;
import com.mongodb.MongoCredential;
import com.mongodb.ServerAddress;

public class JacksonJSR310Reproducer {
    
    // Field that causes trouble
    Instant i = Instant.now();

    // Reproducer method
    public static void main(String[] args) throws UnknownHostException {
        
        // Mapper
        Mapper mapper = new Builder().registerModule(new JSR310Module()).build();
        
        // Create a Jongo wrapper for the database and the mapper
        Jongo jongo = new Jongo(new MongoClient().getDB("mydb"), mapper);
        MongoCollection testColl = jongo.getCollection("testColl");
        
        // Save an object
        testColl.save(new JacksonJSR310Reproducer());
        
        // Result in mongo db looks as follows (note that i contains a string):
        //
        // > db.testColl.find().pretty()
        // {
        //    "_id" : ObjectId("55bf8f564bd24cf6666e80ca"),
        //    "i" : "1438617430.458000000"
        // }

        // Try to load it:
        testColl.findOne().as(JacksonJSR310Reproducer.class);
        
        // Throws:
        //
        // Exception in thread "main" org.jongo.marshall.MarshallingException: Unable to unmarshall result to class jacksonrepro.JacksonJSR310Reproducer from content { "_id" : { "$oid" : "55bf8f564bd24cf6666e80ca"} , "i" : "1438617430.458000000"}
        //         at org.jongo.marshall.jackson.JacksonEngine.unmarshall(JacksonEngine.java:45)
        //         at org.jongo.ResultHandlerFactory$UnmarshallingResultHandler.map(ResultHandlerFactory.java:43)
        //         at org.jongo.FindOne.map(FindOne.java:51)
        //         at org.jongo.FindOne.as(FindOne.java:46)
        //         at jacksonrepro.JacksonJSR310Reproducer.main(JacksonJSR310Reproducer.java:45)
        // Caused by: com.fasterxml.jackson.databind.JsonMappingException: Text '1438617430.458000000' could not be parsed at index 0 (through reference chain: jacksonrepro.JacksonJSR310Reproducer["i"])
        //         at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:232)
        //         at com.fasterxml.jackson.databind.JsonMappingException.wrapWithPath(JsonMappingException.java:197)
        //         at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.wrapAndThrow(BeanDeserializerBase.java:1415)
        //         at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:244)
        //         at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:118)
        //         at com.fasterxml.jackson.databind.ObjectReader._bindAndClose(ObjectReader.java:1269)
        //         at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:928)
        //         at org.jongo.marshall.jackson.JacksonEngine.unmarshall(JacksonEngine.java:42)
        //         ... 4 more
        // Caused by: java.time.format.DateTimeParseException: Text '1438617430.458000000' could not be parsed at index 0
        //         at java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:1947)
        //         at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1849)
        //         at java.time.Instant.parse(Instant.java:395)
        //         at com.fasterxml.jackson.datatype.jsr310.deser.InstantDeserializer$$Lambda$1/733957003.apply(Unknown Source)
        //         at com.fasterxml.jackson.datatype.jsr310.deser.InstantDeserializer.deserialize(InstantDeserializer.java:119)
        //         at com.fasterxml.jackson.datatype.jsr310.deser.InstantDeserializer.deserialize(InstantDeserializer.java:40)
        //         at com.fasterxml.jackson.databind.deser.SettableBeanProperty.deserialize(SettableBeanProperty.java:538)
        //         at com.fasterxml.jackson.databind.deser.impl.FieldProperty.deserializeAndSet(FieldProperty.java:106)
        //         at com.fasterxml.jackson.databind.deser.BeanDeserializer.vanillaDeserialize(BeanDeserializer.java:242)
        //         ... 8 more
    }
}

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.aioobe</groupId>
    <artifactId>jacksonrepro</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>JacksonJSR310</name>
  
    <dependencies>
        <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongo-java-driver</artifactId>
            <version>2.13.2</version>
        </dependency>
        <dependency>
            <groupId>org.jongo</groupId>
            <artifactId>jongo</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.datatype</groupId>
            <artifactId>jackson-datatype-jsr310</artifactId>
            <version>2.4.0</version>
        </dependency>
    </dependencies>
</project>