[xsd-users] Trouble serializing subclasses.

[Charles Beyer]

I'm having trouble getting the codesynthesis xsd-tree serializer to
fully serialize a list of objects. Perhaps someone here can point out
my misstep.

My schema has a list of baseclass elements:

list of elements of A:
CT AList
  E Values A

complex type A:
CT A
 E ulong ID

complex type B extends A:
CT B : A
 E ulong JD



The generated classes are as you'd imagine.

class A: public ::xml_schema::type
{
...
  typedef ::xml_schema::unsigned_long ID_type;
...
  ::xsd::cxx::tree::one< ID_type > ID_;
}

class B: public A
{
...
  typedef ::xml_schema::unsigned_long JD_type;
...
  ::xsd::cxx::tree::one< ID_type > JD_;
}

class AList: public ::xml_schema::type
{
  typedef A Values_type;
  typedef ::xsd::cxx::tree::sequence< Values_type > Values_sequence;
...
  Values_sequence Values_;
}

I'm tying to serialize an AList that contains classes B:


   // convert the list into an XML string
   std::string msg;
   std::ostringstream oss;
   xml_schema::namespace_infomap map;
   map[""].name = "stuff";
   map[""].schema = "Schema.xsd";
   AList_ (oss, aList, map);
   msg = oss.str();

It only serializes the Values as type A, not the subclass B:


<AList xmlns="stuff"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="stuff Schema.xsd">
  <Values>
    <ID>99999999999</ID>
  </Values>
  <Values>
    <ID>2</ID>
  </Values>
</AList>



Using the exact same schema in .NET and C#, it properly serializes AList:

<AList xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="stuff">
  <Values xsi:type="B">
    <ID>99999999999</ID>
    <JD>5</JD>
  </Values>
  <Values xsi:type="B">
    <ID>2</ID>
    <JD>10</JD>
  </Values>
</AList>


So, that's it.  I'm trying to get the xsd-tree serializer to work like
my cs xsd serializer.  Any pointers?

-- 
Charles Beyer,
cjbeyer at gmail.com
Austin, TX