collection.distinct(...).query(...).as(Long.class) not casting as expected

[chneau]

Hello,

Using Jongo 1.3.0 and Java 1.8

Database side:
Collection of object where one of the field is a number (no decimal) (let's say the field is named 'a').

Code side:
theCollection.distinct("a").query("{a:{$lte:5}}").as(Long.class)

Result:
List where the type of the elements is Integer (seen through Eclipse debugger). (Please see screenshot)

Expected:
List where elements are of type Long.

In my case:

        private final Map<String, List<Long>>          cacheLocMMSI = new HashMap<>();

and

        this.cacheLocMMSI.put(positionBefore.toString(), this.positionCollection.distinct("MMSI")//
                .query("{location: {$near:{$geometry:{type:'Point',coordinates:#},$maxDistance: 5000}},SOG:{$lte:1}}", positionBefore)//
                .as(Long.class));

An error is thrown later when I do a for loop:

    final List<Long> mmsis = new ArrayList<>(this.cacheLocMMSI.get(positionBefore.toString()));
    for (int i = 0; i < mmsis.size(); i++) {
        final Long mmsi = mmsis.get(i); // Error thrown here
    }

The error is :
Exception in thread "main" java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Long

Workaround:
I create a list of Integer then I stream it like this:
.stream().map(Long::valueOf).collect(Collectors.toList())

From here, I got a List of Long that is usable on a list without exceptions.