JsonSerializable gets ignored on classes implementing Map #296
Description
I have a class that extends Map[,] but implements its own Json serialization. I just jumped from 2.4.1 to 2.8.3 and I hit an error where its custom serialization doesn't get used. Instead, it attempts to serialize the object based on its Map interface. I expected the JsonSerializable implementation to take priority over any other modules matching the class.
I narrowed down the break to somewhere between tags 2.6.0-rc2 and 2.6.0-rc4. I'll keep looking, but it would be nice if someone might have a direction to point me in. Here's a test class I setup to reproduce the error. It's the one that works in rc2 but fails rc4.
import com.fasterxml.jackson.module.scala.BaseFixture
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.scala.DefaultScalaModule
import com.fasterxml.jackson.databind.JsonSerializable
import com.fasterxml.jackson.databind.SerializerProvider
import com.fasterxml.jackson.databind.jsontype.TypeSerializer
import com.fasterxml.jackson.core.JsonGenerator
class SerializableClass extends Map[String, String] with JsonSerializable {
def +[B1 >: String](kv: (String, B1)) = this
def -(key: String): Map[String,String] = this
// Members declared in scala.collection.MapLike
def get(key: String): Option[String] = None
def iterator: Iterator[(String, String)] = throw new IllegalArgumentException("This shouldn't get called")
override def serialize(jgen:JsonGenerator, provider:SerializerProvider) {
jgen.writeNumber(10)
}
override def serializeWithType(jgen:JsonGenerator, provider:SerializerProvider, typeSer:TypeSerializer) {
serialize(jgen, provider)
}
}
class SerializableTest extends BaseFixture {
it should "use serialize method in JsonSerializable" in { mapper =>
mapper.writeValueAsString(new SerializableClass()) shouldBe "10"
}
}