Hello,
While using the methods in my first post, in order to fill the fourth field
in my form, I noticed, by exctracting the entire XFA structure (with
templates, datasets, etc.), that, my datasets part had the following
structure:
<xfa:datasets xmlns:xfa="http://www.xfa.org/schema/xfa-data/1.0/";>
<xfa:data>
<xfa:datasets>
<xfa:data>
<xfa:form>
...
So, the datasets and data tags were doubled. This, I suspected to generate
the error message in Acrobat Reader (dataModel does not have a method
'clone') and went on to fix it.
The behaviour, as much as I can tell was due to two reason:
1. The xml file that I imported had identation
(tf.setOutputProperty(OutputKeys.INDENT,
"yes"))
2. I got the itext source code, went into the com.itextpdf.text.pdf package,
class XfaForm, method public void fillXfaForm(Node node) and changed the
line 1154 from data.replaceChild(domDocument.importNode(node, true),
data.getFirstChild()) to
data.replaceChild(domDocument.importNode(node.getFirstChild().getFirstChild(),
true), data.getFirstChild()).
Though it may not be the best solution, it generates the xfa ok.
So, after recompiling iText and running my tests again, Acrobat Reader
doesn't display the error message anymore, but, the first signature, that of
the user, becomes invalid. If I click the signature panel, it now shows the
details and it says that I have modified all the fields in the form, thus
invalidating the signature, although, I actually only modified field number
four, which wasn't included in the collection of objects for the first
signature.
>From what I read from XFA specs 3.1, I have this:
"Unlike an XML digital signature, a PDF signature signs the XFA form exactly
as it is currently expressed,
rather than signing a normalized copy. This means that it is not possible to
make even meaningless
changes to the XFA form without voiding the signature. For example, changing
a space to a tab in between
an element tag and the following attribute name voids the signature, even
though it does not change the
meaning of the XML."
So, if you could point out whether is it possible to modify a field in a xfa
form, without invalidating the signature, that, obviously, wasn't applied to
that field?
Thank you!
2011/5/3 Leonard Rosenthol <lrose...@adobe.com>
> Then modifying the entire XFA data block after document signing is a bad
> thing…
>
>
>
> *From:* Cosmin Ciuraru [mailto:cosmin.ciur...@gmail.com]
> *Sent:* Tuesday, May 03, 2011 7:57 AM
> *To:* Post all your questions about iText here
> *Subject:* Re: [iText-questions] iText fill XFA Form and Digital signing
>
>
>
> According to this classification:
>
> * *
>
> *
> http://help.adobe.com/en_US/livecycle/9.0/designerHelp/index.htm?content=000628.html
> *
>
>
>
> I use document signatures. The users just click on the signature field to
> sign the document and send it to me afterwards. There is no submit/email
> button.
>
>
>
> Thank you!
>
>
>
>
>
>
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The most intuitive, comprehensive, and cost-effective network
management toolset available today. Delivers lowest initial
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iText(R) is a registered trademark of 1T3XT BVBA.
Many questions posted to this list can (and will) be answered with a reference
to the iText book: http://www.itextpdf.com/book/
Please check the keywords list before you ask for examples:
http://itextpdf.com/themes/keywords.php
