Santuario-java (Stax) extraction

[Chen Nam Sit]

Hi,

In processing an XML encrypted file, I have to extract the <keyInfo> within the 
<EncryptedKey>.
The purpose is to retrieve the corresponding PrivateKey in our keystore, then 
used to decrypt the file.
Besides using XMLStreamReader to parse it manually, is there any facility in 
Santuario-Java (Stax) API to do it?
Or put it in another way, how can I instantiate a KeyInfo object from the 
corresponding <KeyInfo> element by Santuario-Java API .
Any code example in this domain in the Junit tests ?

Thanks.