CODEWITHSUNDEEP
javaschemaavro
Darshan Mehta
Darshan Mehta

Reputation: 30819

Avro schema : List of generic types

Here's Java equivalent of what I am trying to write a schema for, in Avro:

abstract class Vehicle {}
class Bike extends Vehicle {}
class Car extends Vehicle {}
class Bus extends Vehicle {}

Now, I want to have a file with List of Vehicles, e.g.:

List<Vehicle> vehicles = ;

Elements in the list can be either of Bike, Car or Bus. Now, comparing this to Avro schema, I can see the Array type so I might have to write something like this (sorry for the hopelessness on the Avro part, I haven't worked with it before):

{
  "name" : "vehicles",
  "type" : "array",
  "items" : {
    "name" : "???"
  }
}

This is as far as I could go, is there any way to specify that the items can be one of Bike, Car or Bus?

Upvotes: 0

Views: 658

Answers (1)

rohith kumar
rohith kumar

Reputation: 41

Have you tried using union in items as

"items":["Bike","Car","Bus"]

Upvotes: 1

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