Remove Int and Double boxing

We don't seem to need to provide boxing to be more precise. Current way of detecting double numbers seem to be working fine. I want to remove Int and Double custom types for cleanup.

Does it sound good?

SGTM.

Isn't boxing them the only way we do the detection? https://github.com/GoogleCloudPlatform/gcloud-node/blob/master/lib/datastore/entity.js#L208-215:

if (v instanceof Int) {
  p.integerValue = v.get();
  return p;
}
if (v instanceof Double) {
  p.doubleValue = v.get();
  return p;
}

If we remove them, how would a user specify they want a double?

@pcostell

There would be no explicit way to force a field to be double. If it's not a floating point number, we will persist it as uint64 in the backend.

I'm wondering about the impact it has to the backend and indexing. cc/ @pcostell

Unfortunately indexing uses property type to determine order: https://developers.google.com/appengine/docs/java/datastore/indexes#Java_Properties_with_mixed_value_types

When two entities have properties of the same name but different value types, an index of the property sorts the entities first by value type and then by a secondary ordering appropriate to each type. For example, if two entities each have a property named age, one with an integer value and one with a string value, the entity with the integer value always precedes the one with the string value when sorted by the age property, regardless of the property values themselves.