Enums support with Realm?

Question

I'm working on an android app and Realm, and I need to create an enum attribute for one of my objects; but I discovered in this post that Realm doesn't support enum yet.

My object is like this:

public class ShuttleOption extends RealmObject {     private int Id;     private String Label;     private ShuttleTypes OriginShuttleType; } 

and my enum class (ShuttleTypes) corresponds with:

HOME = 1;   

and

WORK = 2; 

Can anybody suggest me how to do it?

Answer 1

You can use the pattern described in the issue: https://github.com/realm/realm-java/issues/776#issuecomment-190147079

Basically save it as a String in Realm and convert it going in and out:

public enum MyEnum {   FOO, BAR; }  public class Foo extends RealmObject {   private String enumDescription;    public void saveEnum(MyEnum val) {     this.enumDescription = val.toString();   }    public MyEnum getEnum() {     return MyEnum.valueOf(enumDescription);   } } 

Answer 2

If you need a solution that works on Kotlin you can use the following:

open class Foo: RealmObject() {     var enum: MyEnum         get() { return MyEnum.valueOf(enumDescription) }         set(newMyEum) { enumDescription = newMyEnum.name }     private var enumDescription: String = MyEnum.FOO.name } 

MyEnum is the enum declared in @ChristianMelchior answer.

It is worth mentioning that since enum doesn't have a backing field,it won't be persisted into Realm. There is no need to use the @Ignore annotation on it