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Posted to users@pdfbox.apache.org by Kevin Ternes <KT...@thegeneral.com> on 2016/04/25 23:49:37 UTC
Completely Remove a Field
It seems like removing a PDField from a loaded PDDocument would be trivial.
The goal is to remove the field from the form and anything related to that field from the displayed PDF.
I have tried just removing the PDField from the List of PDAcroForm.getFields() which does not seem to work.
And I have tried digging into the PDAcroForm's dictionary:
PDField pdField = pdAcroForm.getField("boxAPPL");
COSDictionary formDict = pdAcroForm.getCOSObject();
COSArray fieldz = (COSArray) formDict.getDictionaryObject(COSName.FIELDS);
fieldz.removeObject(pdField.getCOSObject());
which does not appear to work either.
Any is help appreciated.
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RE: Completely Remove a Field
Posted by Kevin Ternes <KT...@thegeneral.com>.
New Solution:
List<PDField> pdFieldList = pdAcroForm.getFields();
removeField(pdFieldList, fieldName);
// other . . .
pdAcroForm.flatten();
public static boolean removeField(List<PDField> pdFieldList, String fieldName) {
boolean removed = false;
Iterator<PDField> it = pdFieldList.iterator();
while (it.hasNext() && !removed) {
PDField pdField = it.next();
if (pdField instanceof PDNonTerminalField) {
List<PDField> pdChildFieldList = ((PDNonTerminalField) pdField).getChildren();
removed = removeField(pdChildFieldList, fieldName);
} else if (fieldName.equals(pdField.getPartialName())) {
pdFieldList.remove(pdField);
removed = true;
}
}
return removed;
}
-----Original Message-----
From: Tilman Hausherr [mailto:THausherr@t-online.de]
Sent: Tuesday, April 26, 2016 12:02 PM
To: users@pdfbox.apache.org
Subject: Re: Completely Remove a Field
Am 25.04.2016 um 23:49 schrieb Kevin Ternes:
> It seems like removing a PDField from a loaded PDDocument would be trivial.
> The goal is to remove the field from the form and anything related to that field from the displayed PDF.
>
> I have tried just removing the PDField from the List of PDAcroForm.getFields() which does not seem to work.
>
> And I have tried digging into the PDAcroForm's dictionary:
> PDField pdField = pdAcroForm.getField("boxAPPL");
> COSDictionary formDict = pdAcroForm.getCOSObject();
> COSArray fieldz = (COSArray) formDict.getDictionaryObject(COSName.FIELDS);
> fieldz.removeObject(pdField.getCOSObject());
>
> which does not appear to work either.
Have a look at PDAcroForm.getFields(). You'll have to work with that, and if you don't find your field, call PDNonTerminalField.getChildren() on non terminal fields. When you find it, remove your field and reassign the list.
To find out whether you got your field, check the name or compare not the PDField object, but its getCOSObject() result.
Your solution in the recent mail might still work with a specific PDF, but I doubt it will work for all PDFs.
Tilman
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Re: Completely Remove a Field
Posted by Tilman Hausherr <TH...@t-online.de>.
Am 25.04.2016 um 23:49 schrieb Kevin Ternes:
> It seems like removing a PDField from a loaded PDDocument would be trivial.
> The goal is to remove the field from the form and anything related to that field from the displayed PDF.
>
> I have tried just removing the PDField from the List of PDAcroForm.getFields() which does not seem to work.
>
> And I have tried digging into the PDAcroForm's dictionary:
> PDField pdField = pdAcroForm.getField("boxAPPL");
> COSDictionary formDict = pdAcroForm.getCOSObject();
> COSArray fieldz = (COSArray) formDict.getDictionaryObject(COSName.FIELDS);
> fieldz.removeObject(pdField.getCOSObject());
>
> which does not appear to work either.
Have a look at PDAcroForm.getFields(). You'll have to work with that,
and if you don't find your field, call PDNonTerminalField.getChildren()
on non terminal fields. When you find it, remove your field and reassign
the list.
To find out whether you got your field, check the name or compare not
the PDField object, but its getCOSObject() result.
Your solution in the recent mail might still work with a specific PDF,
but I doubt it will work for all PDFs.
Tilman
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RE: Completely Remove a Field
Posted by Kevin Ternes <KT...@thegeneral.com>.
The code below works as far as it goes.
Until we call PDAcroForm.flatten(), the removed PDField is still accessible.
So the correct code is:
COSDictionary formDict = pdAcroForm.getCOSObject();
COSArray formFieldArray = (COSArray) formDict.getDictionaryObject(COSName.FIELDS);
formFieldArray.removeObject(pdField.getCOSObject());
// other operations . . .
pdAcroForm.flatten();
-----Original Message-----
From: Kevin Ternes
Sent: Monday, April 25, 2016 4:50 PM
To: users@pdfbox.apache.org
Subject: Completely Remove a Field
It seems like removing a PDField from a loaded PDDocument would be trivial.
The goal is to remove the field from the form and anything related to that field from the displayed PDF.
I have tried just removing the PDField from the List of PDAcroForm.getFields() which does not seem to work.
And I have tried digging into the PDAcroForm's dictionary:
PDField pdField = pdAcroForm.getField("boxAPPL");
COSDictionary formDict = pdAcroForm.getCOSObject();
COSArray fieldz = (COSArray) formDict.getDictionaryObject(COSName.FIELDS);
fieldz.removeObject(pdField.getCOSObject());
which does not appear to work either.
Any is help appreciated.
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