Urgent Help needed for Serialization /Externalization

Hello Guys,

We plan to convern the object to xml using Xstream

Issue is We have object which are instance of Externalizable so when i try to use method toxml it use java Externalization

(readExternal and writeExternal method ) to convert it to xml ...

But if i conver that to Serializable object meaining remove Externalization from object defintion ,it use the default java

serialization to convert it to xml

For someone reason i want toXML method to alway use Serialization version to convert to xml and not Exteranlization ..
I cannot change my objects definition as there are 1000 of classses ...

Is there a way in xstream that would allow me to do something like

Xstream xstream=new Xstream(DO NOT use ReadExternal and WriteExternal)
xstream.toXML(Exteranlizableobj)

so that i get output as

<object)
<_fieldA>1000</_fieldA>
</object>

INSTEAD OF

<object)
<int>1000</int>
</object>

This issue is extremely important to us so please help me out in solving this problem...

Regards
Mahesh