The object models I was handling were actually complex and deep and required me to define some very sophisticated XML mappings. They consisted of many lists, maps, arrays, and objects at various levels. Some of the objects had indirect relationships with other objects scattered throughout the model. I had to write specific handlers to ensure that these relationships were maintained during the marshaling and unmarshaling processes. Castor was very accommodating in all regards and made it relatively easy to do.

I had developed a similiar aproach some time agou but using concrete mock objects instead of serialized ones. Instead of intercepting method calls my solution has intercepted creation of concrete object instances.

Could you please explain a little more in details how you handle complex arguments and return types? As far as it is visible from your code you can just handle simple types, arn’t you?