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https://issues.apache.org/jira/browse/PDFBOX-2470?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14193119#comment-14193119
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Tilman Hausherr commented on PDFBOX-2470:
-----------------------------------------
Is this a bug report or an enhancement suggestion? If it is a bug, please post
the exception stack trace and maybe attach a PDF that produces the exception. I
haven't really understood what this issue is about. A good bug report contains
1) what did you do 2) what were you expecting 3) what happened.
> Exception in PDDocument.addSignature(PDSignature sigObject,
> SignatureInterface signatureInterface, SignatureOptions options))
> -----------------------------------------------------------------------------------------------------------------------------
>
> Key: PDFBOX-2470
> URL: https://issues.apache.org/jira/browse/PDFBOX-2470
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.8.7
> Reporter: Huynh
> Labels: patch
>
> Hi
> I have made the following modifications to avoid ClassCastException or
> NullPointerException in addSignature(PDSignature sigObject,
> SignatureInterface signatureInterface, SignatureOptions options) :
> {code}
> // Appearance Dictionary auslesen und setzen
> // MOD_CS
> // PDAppearanceDictionary ap =
> // new
> PDAppearanceDictionary((COSDictionary)cosBaseDict.getItem(COSName.AP));
> // ap.getDictionary().setDirect(true);
> // signatureField.getWidget().setAppearance(ap);
> COSBase item = cosBaseDict.getItem(COSName.AP);
> if (item instanceof COSObject) {
> item = ((COSObject) item).getObject();
> }
> if (item instanceof COSDictionary) {
> PDAppearanceDictionary ap = new
> PDAppearanceDictionary((COSDictionary) item);
> ap.getDictionary().setDirect(true);
> signatureField.getWidget().setAppearance(ap);
> }
>
> // AcroForm DefaultRessource auslesen und setzen
> COSBase dr = cosBaseDict.getItem(COSName.DR);
> // MOD_CS
> if (dr != null) {
> dr.setDirect(true);
> dr.setNeedToBeUpdate(true);
> acroFormDict.setItem(COSName.DR, dr);
> }
> {code}
> Regards
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