On Mon, May 26, 2014 at 3:43 AM, Han JU <[email protected]> wrote:
> My question for the moment: is it possible to custom the hashCode function
> of a avro record? Say a record a a field `uid` and I'd like to return this
> value as the hashCode.
If you're using Avro's reflect model then you can simply override your
hashCode method.
If you're using generic or specific then you can specify a schema
where all other fields are ignored, e.g.:
{"type":"record", "name":"org.random.Foo", "fields":[
{"name":"uid", "type":"string"},
{"name":"x", "type":"long", "order":"ignore"},
{"name":"y", "type":"float", "order":"ignore"},
{"name":"z", "type":"double", "order":"ignore"}
]}
Avro's hashes and comparisons only consider fields that are not ignored.
Doug
