HashMap<UUID, any> is not properly decoded

Describe the bug HashMap<UUID, any> objects encode perfectly and are stored in Mongo as expected. When decoding, Morphia will use strings as the key instead of UUIDs, despite there being a UUID Converter.

To Reproduce Steps to reproduce the behavior:

1. Create a HashMap<UUID, String> and put anything in it.
2. Save the object using datastore.save(map)
3. Load the object with Morphia.
4. Try map.get(uuid). Returns null. Try `map.forEach(uid -> System.out.println(uid.toString())) Generates cast error from string to UUID.

Expected behavior I expected the HashMap to properly load with UUID objects as the key.

** Please complete the following information: **

• Server Version: 4.0.0
• Driver Version: 3.12.5
• Morphia Version: 1.6.0

I cannot use version 2.0.0 as currently Java 8 is required. I see this issue was raised and fixed in 2013, but it appears to not be working.

[evanchooly]

OK. I’ll see what I can do to recreate this and see about detecting the UUID type. If it saves, it should load. That seems a reasonable minimum expectation. 😃

[evanchooly]

1.6.1 is live in central now. You’ll still need to manually add the converter. I toyed with adding it by default but that converter saves values as Strings where the driver chose to write to Binary. Since adding the converter might trip up on existing data in someone’s database, I opted to keep it off by default just to be safe.