From ff7cb608cf330a282b41329a50fd2244419b999b Mon Sep 17 00:00:00 2001
From: Gerald Palfinger <gerald.palfinger@iaik.tugraz.at>
Date: Fri, 6 May 2022 14:01:53 +0200
Subject: Avoid printing stack trace if results is null

---
 .../pdfbox2/placeholder/SignatureFieldsAndPlaceHolderExtractor.java    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignatureFieldsAndPlaceHolderExtractor.java b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignatureFieldsAndPlaceHolderExtractor.java
index 63552c2a..609f8254 100644
--- a/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignatureFieldsAndPlaceHolderExtractor.java
+++ b/pdf-as-pdfbox-2/src/main/java/at/gv/egiz/pdfas/lib/impl/pdfbox2/placeholder/SignatureFieldsAndPlaceHolderExtractor.java
@@ -50,6 +50,9 @@ public class SignatureFieldsAndPlaceHolderExtractor {
                 mode, doc);
             List<SignaturePlaceholderData> results = signaturePlaceholderExtractor.extractList(doc, placeholderId,
                 mode);
+            if (results == null) {
+                return null;
+            }
             List<String> used = getExistingSignatureLocations(doc);
             //return first not used
             for(SignaturePlaceholderData result : results) {
-- 
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