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18191179
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2013-08-12T15:41:18.113
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2013-08-12T15:41:18.113
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I believe there a two bugs here one related to Map the other to Seq(tuple) 1) Maps not exporting the type information on serialization 2) Seq(Tuple) ignores type information on De-Serialization Workround: - Use a wrapper class to replace tuple. <pre><code>@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.EXTERNAL_PROPERTY, property = "type") @JsonSubTypes(Array( new Type(value = classOf[B], name = "B"), new Type(value = classOf[C], name = "C"))) trait A{} case class B(value : Double) extends A case class C(value : String) extends A case class ContainerWithMap( results: Map[String, A]) case class ContainerWithTupleSeq( results: Seq[(String, A)]) case class ContainerWithWrappedSeq( results: Seq[WrapperClass]) case class WrapperClass(s : String, a : A) class ATest extends FlatSpec with ShouldMatchers { behavior of "A" val map: Map[String, A] = Map("ExampleB" -> B(1.0), "ExampleC" -> C("One")) val seq: Seq[WrapperClass] = Seq(WrapperClass("ExampleB", B(1.0)), WrapperClass( "ExampleC",C("One"))) it should "fail not supporting reciprocal serialize de-serialize behaviour for maps" in { val owner : ContainerWithMap = ContainerWithMap(map) val serialize: String = JsonMarshall.serialize(owner) println(serialize) // types not exported on serialization val thrown = evaluating{JsonMarshall.deserialize[ContainerWithMap](serialize)} should produce [JsonMappingException] thrown.getMessage should startWith("Unexpected token (END_OBJECT), expected FIELD_NAME: missing property 'type' that is to contain type id") } it should "fail not supporting reciprocal serialize de-serialize behaviour for sequence of tuples" in { val owner : ContainerWithTupleSeq = ContainerWithTupleSeq(map.toSeq) val serialize: String = JsonMarshall.serialize(owner) println(serialize) // types ignored on de-Serialization val thrown = evaluating{JsonMarshall.deserialize[ContainerWithTupleSeq](serialize)} should produce [JsonMappingException] thrown.getMessage should startWith("Can not construct instance of com.egc.ost.pricing.contracts.response.A, problem: " + "abstract types either need to be mapped to concrete types, have custom deserializer, or be instantiated with additional type information") } it should "work if using a wrapper class" in { val owner : ContainerWithWrappedSeq = ContainerWithWrappedSeq(seq) val serialize: String = JsonMarshall.serialize(owner) println(serialize) val deserialize: ContainerWithWrappedSeq = JsonMarshall.deserialize[ContainerWithWrappedSeq](serialize) println(deserialize) deserialize should be(owner) } } </code></pre>
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1. POFailing Polymorphic de-serialization in Jackson with Scala module when polymorphic types are within a Seq()
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