[PDFBOX-2470] Exception in PDDocument.addSignature(PDSignature sigObject, SignatureInterface signatureInterface, SignatureOptions options))

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.8.7, 1.8.8, 2.0.0
• Fix Version/s: 1.8.8, 2.0.0
• Component/s: PDModel
• Labels: Signature patch
• Assignee: Unassigned
• Reporter: Huynh
• Created: 31/Oct/14 13:57
• Updated: 13/Dec/14 14:14
• Resolved: 07/Nov/14 22:45

Description

Hi
I have made the following modifications to avoid ClassCastException or NullPointerException in addSignature(PDSignature sigObject, SignatureInterface signatureInterface, SignatureOptions options) :

                        // read and set Appearance Dictionary
                        // 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);
                    	}
                    	
                        // read and set AcroForm DefaultRessource 
                        COSBase dr = cosBaseDict.getItem(COSName.DR);
                        // MOD_CS
                        if (dr != null) {
	                        dr.setDirect(true);
	                        dr.setNeedToBeUpdate(true);
	                        acroFormDict.setItem(COSName.DR, dr);
                        }

Regards