[Mono-bugs] [Bug 403829] New: Cannot deserialize an array of base types that contains instances of derived types

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=403829


           Summary: Cannot deserialize an array of base types that contains
                    instances of derived types
           Product: Mono: Class Libraries
           Version: SVN
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: WCF
        AssignedTo: noaml at mainsoft.com
        ReportedBy: taktaktaktaktaktaktaktaktaktak at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


One cannot return an array of base types that contains instances of derived
types from an OperationContract method.

If I have data contracts:
    [DataContract]
    [KnownType(typeof(DerivedContract))]
    public class BaseContract {
        [DataMember]
        string name;
    }

    [DataContract]
    public class DerivedContract: BaseContract {
        [DataMember]
        bool blah;
    }

a service contract:
    [ServiceContract]
    public interface IMyServiceContract
    {
        [OperationContract]
        BaseContract[] foo();
    }

a service implementation:
    public BaseContract[] foo() {
        return new BaseContract[]{ new DerivedContract() };
    }// foo

and a client:
    BaseContract[] blah = s.foo();
    System.Console.WriteLine("Got {0}", blah[0].GetType().ToString());

The expected result is:
Got DerivedContract.
(This is the result on MS.NET, btw)

Executing the client gives:
Unhandled Exception: System.Runtime.Serialization.SerializationException:
Unknown type Contracts.BaseContract is used for DataContract. Any derived types
of a data contract or a data member should be added to KnownTypes.
  at System.Runtime.Serialization.XmlFormatterDeserializer.DeserializeContent
(System.Xml.XmlQualifiedName name, System.Type type, System.Xml.XmlReader
reader) [0x00076] in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/XmlFormatterDeserializer.cs:139 
  at System.Runtime.Serialization.XmlFormatterDeserializer.Deserialize
(System.Type type, System.Xml.XmlReader reader) [0x000d5] in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/XmlFormatterDeserializer.cs:111 
  at System.Runtime.Serialization.CollectionTypeMap.DeserializeContent
(System.Xml.XmlReader reader,
System.Runtime.Serialization.XmlFormatterDeserializer deserializer) [0x0004c]
in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/SerializationMap.cs:476 
  at System.Runtime.Serialization.XmlFormatterDeserializer.DeserializeContent
(System.Xml.XmlQualifiedName name, System.Type type, System.Xml.XmlReader
reader) [0x0006d] in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/XmlFormatterDeserializer.cs:138 
  at System.Runtime.Serialization.XmlFormatterDeserializer.Deserialize
(System.Type type, System.Xml.XmlReader reader) [0x000d5] in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/XmlFormatterDeserializer.cs:111 
  at System.Runtime.Serialization.XmlFormatterDeserializer.Deserialize
(System.Xml.XmlReader reader, System.Type type,
System.Runtime.Serialization.KnownTypeCollection knownTypes,
IDataContractSurrogate surrogate, System.String name, System.String Namespace,
Boolean verifyObjectName) [0x0001a] in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/XmlFormatterDeserializer.cs:53 
  at System.Runtime.Serialization.DataContractSerializer.ReadObject
(System.Xml.XmlDictionaryReader reader, Boolean verifyObjectName) [0x00024] in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/DataContractSerializer.cs:269 
  at System.Runtime.Serialization.XmlObjectSerializer.ReadObject
(System.Xml.XmlDictionaryReader reader) [0x00000] in
/home/lbar4/dev/olive/class/System.Runtime.Serialization/System.Runtime.Serialization/XmlObjectSerializer.cs:77 
  at
System.ServiceModel.Dispatcher.DataContractMessagesFormatter.MessageToParts
(System.ServiceModel.Description.MessageDescription md,
System.ServiceModel.Channels.Message message) [0x000b8] in
/home/lbar4/dev/olive/class/System.ServiceModel/System.ServiceModel.Dispatcher/BaseMessagesFormatter.cs:349 
  at System.ServiceModel.Dispatcher.BaseMessagesFormatter.DeserializeReply
(System.ServiceModel.Channels.Message message, System.Object[] parameters)
[0x00048] in
/home/lbar4/dev/olive/class/System.ServiceModel/System.ServiceModel.Dispatcher/BaseMessagesFormatter.cs:165 
  at System.ServiceModel.ClientRuntimeChannel.Request
(System.ServiceModel.Description.OperationDescription od, System.Object[]
parameters) [0x0016a] in
/home/lbar4/dev/olive/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:374 
  at System.ServiceModel.ClientRuntimeChannel.Process
(System.Reflection.MethodBase method, System.String operationName,
System.Object[] parameters) [0x00015] in
/home/lbar4/dev/olive/class/System.ServiceModel/System.ServiceModel/ClientRuntimeChannel.cs:226 
  at __clientproxy_IMyServiceContract.foo () [0x00000] 
  at OlivePolymorphTest.MyClient.Main (System.String[] args) [0x00071] in
/home/lbar4/dev/OlivePolymorphTest/OlivePolymorphTest/MyClient.cs:26 

I'm using olive r106446.


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