Using SortedSet in Entity causing issues in Codec

[arivazhagan-jeganathan]

@evanchooly please suggest on the following
How do I make use of SortedSet in my Entity? Morphia throws the following exception.

org.bson.codecs.configuration.CodecConfigurationException: Unsupported Collection interface of java.util.SortedSet!
	at dev.morphia.mapping.codec.CollectionCodec.getInstance(CollectionCodec.java:75)
	at dev.morphia.mapping.codec.CollectionCodec.decode(CollectionCodec.java:49)
	at dev.morphia.mapping.codec.MorphiaCollectionCodec.decode(MorphiaCollectionCodec.java:18)
	at dev.morphia.mapping.codec.MorphiaCollectionCodec.decode(MorphiaCollectionCodec.java:10)
	at org.bson.codecs.DecoderContext.decodeWithChildContext(DecoderContext.java:96)
	at dev.morphia.mapping.codec.pojo.EntityDecoder.decodeModel(EntityDecoder.java:59)
	at dev.morphia.mapping.codec.pojo.EntityDecoder.decodeProperties(EntityDecoder.java:80)
	at dev.morphia.mapping.codec.pojo.EntityDecoder.decode(EntityDecoder.java:35)
	at dev.morphia.mapping.codec.pojo.MorphiaCodec.decode(MorphiaCodec.java:71)
	at dev.morphia.mapping.codec.pojo.EntityDecoder.decode(EntityDecoder.java:40)

CollectionCodec also seems to handle only ArrayList and HashSet.class.
Morphia:2.2.3
Mongo driver: 3.8.10

[evanchooly]

Can you show me your entity and how you have it mapped? I have general sense of where the bug is but it could in a few different places depending on your mapping.

[arivazhagan-jeganathan]

@evanchooly please let me know if additional details needed

@Entity(useDiscriminator=false)
@Indexes(@Index(options = @IndexOptions(name = "salary"), fields = @Field("salary")))
class EmployeeDetails {
    @Id
    private ObjectId id;
    private String name;
    private String currentOrg;
    private Integer age;
    @Reference
    private EmployeeDetails manager;
    @Reference
    private List<EmployeeDetails> directReports = new ArrayList<>();
    @Property("wage")
    private Double salary;
    
    private SortedSet<String> kidNames; 

Above is my test entity. kidNames is attribute of type SortedSet.

I insert the Employee data with SortedSetValue populated as below:

     elmer.setFixTime(Timestamp.from(Instant.now()));
        
        SortedSet<String> kidNames = new TreeSet<>();
        kidNames.add("babya");
        kidNames.add("babyb");
        
        elmer.setKidNames(kidNames);
        
        EmployeeDAO employeeDAO = new EmployeeDAO();
        employeeDAO.insert(elmer);