Hello, I resolved my problem!! =)
I used the static method getElementById of the IdResolver class
i had to do the following import
import org.apache.xml.security.utils.*;
So now i can get and Element using the id as input, given the fact that the xml
has no schema associated.... =)
hope that the getElementById method is efficient ahah
Thanks again
Francisco
From: [EMAIL PROTECTED]: [EMAIL PROTECTED]: problem DOMSignContext
getElementByID org.w3c.dom.DocumentDate: Thu, 17 Jan 2008 21:03:56 +0000
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
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