Hi,
I have a few questions about serialization and deserialization of Collections and Maps with Axis.
Basically our app has a Business Object Model of DTOs (Data Transfer Objects) that it relatively complex from a Soap p.o.v., ie: it contains lists, sets and maps within it. All the lists, sets and maps in the BOM contain elements of one type only.
We are evaluating the practicallity of exposing the API of our application (currently accessed through Stateless Session EJBs) also as a WebService through AXIS.
I have got it working for "simple" return values, but for complex return values as I expected it doesn't work as easily.
What I want to be able to do is use the serialization and deserialization abilities of Axis to serialise any and all Collections in the return values as typed arrays (I'll get to maps in a minute).
I think that the BeanSerializer can currently serialize a List as xsd:anyType[] or soapenc:Array, but I need it to be typed when it is serialized so that any client can generate everything it needs from the wsdl and not have to worry about any complex mappings etc..
I plan to markup the DTOs and use xDoclet and to generate custom serialization and deserialization classes:
ie:
----------------------------------------
class MouseDTO
{
/**
* @mymarkuptag.list type=Cat
*/
public List getCats() ...
/**
* @mymarkuptag.set type=Dog
*/
public Set getDogs() ...
}
class CatDTO
{
..
}
class DogDTO
{
..
}
----------------------------------------
would generate
----------------------------------------
class FooDTOSerialiser extends MyCollectionSerializer
{
FooDTOSerialiser()
{
super(new String[]{"cats","dogs"}, new Class[]{CatDTO.class, DogDTO.class});
}
}
----------------------------------------
Then I plan to write a MyCollectionSerializer base class which will act like the current BeanSerializer (probably will extend it) but for the properties that were specified in the constructor (ie: cats) it will do the serialisation as if it were an array of that type (ie: CatDTO[]).
Maps would work the same way except that there would be two classes marked up for the key and value types and they would be serialised as an array of a type that contains the key and value types (ie: TypeATypeBPair[], where TypeATypeBPair is { TypeA key, TypeB value}).
Now, the questions:
Does what I want to do make sense?
Is there anything out in Axis land that does this already?
Does anyone have any ideas/input into how I would/should write the base serializer classes?
Any other ideas of feedback would be appreciated
Cheers -Marc
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