JAXB : comparing and updating trees

[Jean-Marie Condom]

hello

after having loaded two xml files (file1.xml and file2.xml),
using unmarshaling process and based on the same xml schema,
i get two trees (tree1 and tree2) and i have to do the following operations :
1 - compare both trees
to see whether they are identical or not
2 - update tree1 from tree2 if sub-trees are present in tree2
and lacking in tree1

does jaxb provides methods to do such operations ?

thanks in advance

Jean-Marie