Hello everyone ...
I want to sign the following xml file ENVELOPED with respect to the element
with id "a2"
<?xml version="1.0"?>
<getToken>
<contexto id="trx">
<monto>100</monto>
</contexto>
<item id="a2">
<semilla>10</semilla>
</item>
<item id="a3">
<semilla>11</semilla>
</item>
</getToken>
As you can see there is no namespace declaration for the XML file...
The output should be:
<?xml version="1.0"?>
<getToken>
<contexto id="trx">
<monto>100</monto>
</contexto>
<item id="a2">
<semilla>10</semilla>
<Signature>... </Signature>
</item>
<item id="a3">
<semilla>11</semilla>
</item>
</getToken>
I know that i have to specify the place of the signature were you create an
instance of the
DOMSignContext class...
I GET WHAT I WANT IF I DO ...
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
doc = dbf.newDocumentBuilder().parse(new FileInputStream("file.xml"));
Element e=(Element)doc.getElementsByTagNameNS(null, "item").item(0);
dsc = new DOMSignContext(pk,e );
BUT the problem is that for that i will have to know the "NAME" of the element
and its "POSITION" in the document for the case when the tag appers more than
once...
So, it would be better to be able to do this....
Element e=(Element)doc.getElementsByID("a2");
dsc = new DOMSignContext(pk,e );
But when i do that i get
Exception in thread "main" java.lang.NullPointerException: parent cannot be null
I know that you can register the ID attribute as a valid ID type using the
setIdAttributeNS method of the DomSignContext class, but my problem is that
given the structure of the Document class and its public methods i have to
create an instance of the class first, when i create the instance i have to do
dsc = new DOMSignContext(pk,e );
And after that i could do
dsc.setIdAttributeNS(e, null, "id");
and it suppose that after that the id attribute of the e element is
registered???
but at that time i already have the element that i was looking for =(
Hope you get it, but i want to obtain the element given its ID, and the source
xml doen't have an schema associated to it... is the ONLY WAY to obtain the
element given the id is to use the getElementsByTagNameNS method or i can use
directly the getElementsByID method directly?? in that case HOw do you do that
without obtaining the "parent can not be null exception" ??
Thanks you very much for reading the email
Francisco
_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today it's FREE!
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/
