Adam, Thanks for your solution, I search again and I saw one thing I didn't seen before. When you have a COSObject with stream data, you can directly cast this COSObject to COSStream (because this is a COSStream object).
So, in my JAVA code, instead of creating a COSObject for the last level, I create a COSStream object and I can change the stream by creating a new filtered stream. Indeed, the COSStream provide some methods to change the stream data. Thanks for your help ;) You were right : a debugger and the Javadocs is the best solution ! But I think we could put more code examples for newbies who want to learn about this powerfull library. Thanks again :D Regards, 2010/8/25 <[email protected]> > Mathieu, > > Okay, now I understand your issue, and I think it's just related to > streams (as opposed to AcroForms). Unfortunately I don't know the answer, > however I can give you a little insight as to how the objects work. Maybe > someone who's dealt with streams can add some more concise suggestions. > > Streams must be preceded by a dictionary describing the length of the > stream, optionally the filter, and so on (see section 7.3.8.1 of the PDF > spec). Then there's the actual stream data, which contains some kind of > data, which could even be additional objects (see section 7.5.7 of the PDF > spec). In your case, it doesn't contain more objects as the /Type is not > "ObjStm". If I had to guess, I'd say it's an image that you have there. > > The getDictionaryObject method is only going to give you the metadata, not > your actual stream data. As I said, I've never worked with AcroForms, so > I'm not very familiar with the PDField class, but looking over the API[1] > I'd say getCOSObject() may be of interest as well as getKids() and maybe > getWidget(). I also see that there is a setValue() and setKids() methods > which may help. > > My suggestion would be to debug and looking through the structures in > memory until you find the data you're looking for. Once you find it, just > look for methods that sound like they'll get you what you're looking for > (and it's easy to see if it's in the object returned by a method when > you're debugging). That's how I figured most of the things I've done with > PDFBox... a debugger and the Javadocs. It's a fast way to learn just > enough about the code to get the job done. > > [1] > > http://www.pdfbox.org/javadoc/org/pdfbox/pdmodel/interactive/form/PDField.html > > ---- > Thanks, > Adam > > > > > > From: > mathieu fabre <[email protected]> > To: > [email protected] > Cc: > [email protected] > Date: > 08/25/2010 03:27 > Subject: > Re: need help for stream part in a PDF file > > > > Adam, thanks for your answer. > > First, in my JAVA code, at the end of the method, I have put the > doc.save() > and doc.close() methods. > So the document is correctly saved/updated and closed. > My problem is not really an exception issue, because I don't have any > exception. > > In fact, I just don't know how to have access to the STREAM part of the > COSObject/COSDictionnary. > I don't know the way to change the stream content. I suppose that I can > have > access to the stream content > when I have access to its container object, but i don't know how... > > I try to have a look at the Javadoc API but I didin't find the solution > :(. > > In my JAVA code, with the line : > > COSDictionary iField = > (COSDictionary)mkField.getDictionaryObject(cosName2); > > iField is supposed to be my COSObject/COSDictionnary that I want to modify > the stream part. > I checked it was the good object by printing it. > But there is not method such as iField.setStream() > > Regars, > > > 2010/8/24 <[email protected]> > > > The code you posted doesn't call any of the doc.save() methods. It also > > never sets anything in the acroform. What version of PDFBox are you > > using? When you say it doesn't work, do you mean it throws an > exception? > > Is this only an issue with AcroForm, or with the entire PDF (i.e. Can > you > > make other changes to the PDF and save them properly)? Can you provide > > all your code and put the PDF online somewhere and send us a link so we > > can try to duplicate the issue? > > > > I haven't dealt with AcroForms at all, so I'm not sure I can help you, > but > > I can tell you that we'll at least need the code which updates & saves > the > > data before we can help with why it won't update & save. > > > > ---- > > Thanks, > > Adam > > > > > > From: > > mathieu fabre <[email protected]> > > To: > > [email protected] > > Date: > > 08/24/2010 14:09 > > Subject: > > Re: need help for stream part in a PDF file > > > > > > > > No one can help me for this problem ...? > > > > 2010/8/13 mathieu fabre <[email protected]> > > > > > Hi, > > > > > > I recently use the PDFBox librairy and I would like to change the > stream > > > part of an object which is an AcroForm Object (a stream in PDF Form > > object). > > > > > > in the PDF, for example we have this: > > > * > > > 83 0 obj<</Subtype/Form > > > /Length 637 > > > /Filter[/FlateDecode] > > > /Name/FRM > > > /Matrix[1.0 0.0 0.0 1.0 -9.21249 -82.235] > > > /Resources 214 0 R > > > /Type/XObject > > > /BBox[0.0 0.0599976 18.425 164.41] > > > /FormType 1>> > > > stream > > > > > > some stream unreadable... that i want to change with other stream > > > > > > endstream > > > endobj* > > > > > > > > > In the JAVA code, i am able to go to the object with the code : > > > > > > // Create the PDF Document > > > PDDocument doc = PDDocument.load(myFile); > > > > > > // Extract the catalog > > > PDDocumentCatalog catalog = doc.getDocumentCatalog(); > > > > > > // Retrieve the AcroForm > > > PDAcroForm acroForm = catalog.getAcroForm(); > > > > > > // Retrieve all fields that should be change > > > List listField = acroForm.getFields(); > > > Iterator<PDField> it = listField.iterator(); > > > > > > // Loop on each field > > > while(it.hasNext()) > > > { > > > // Cast to PDField > > > Hfield = (PDField)it.next(); > > > > > > // Retrive the COSObject containing the stream part > > > COSDictionary dicoField = (COSDictionary)field.getCOSObject(); > > > COSDictionary mkField = > > > (COSDictionary)dicoField.getDictionaryObject(cosName1); > > > COSDictionary iField = > > > (COSDictionary)mkField.getDictionaryObject(cosName2); > > > > > > // Here, i am on the good object (83 0) and if I print the iField, > I > > > obtain same information as in the PDF file > > > // But I am not able to have acces to the STREAM part of the > > > COSObject/COSDictionary > > > } > > > > > > Could you help please ? I don't know how to change the stream part. I > > > thought the COSOject could give me this possibility... :| > > > > > > Thanks, in advance > > > > > > -- > > > Mat > > > > > > > > > > > -- > > Mat > > > > > > > > ? Click here to submit conditions > > > > This email and any content within or attached hereto from Sun West > > Mortgage Company, Inc. is confidential and/or legally privileged. The > > information is intended only for the use of the individual or entity > named > > on this email. If you are not the intended recipient, you are hereby > > notified that any disclosure, copying, distribution or the taking of any > > action in reliance on the contents of this email information is strictly > > prohibited, and that the documents should be returned to this office > > immediately by email. Receipt by anyone other than the intended > recipient is > > not a waiver of any privilege. Please do not include your social > security > > number, account number, or any other personal or financial information > in > > the content of the email. Should you have any questions, please call > (800) > > 453 7884. > > > > > -- > Mat > > > > ? Click here to submit conditions > > This email and any content within or attached hereto from Sun West > Mortgage Company, Inc. is confidential and/or legally privileged. The > information is intended only for the use of the individual or entity named > on this email. If you are not the intended recipient, you are hereby > notified that any disclosure, copying, distribution or the taking of any > action in reliance on the contents of this email information is strictly > prohibited, and that the documents should be returned to this office > immediately by email. Receipt by anyone other than the intended recipient is > not a waiver of any privilege. Please do not include your social security > number, account number, or any other personal or financial information in > the content of the email. Should you have any questions, please call (800) > 453 7884. > -- Mat
