From 371cbb67a1e4c32bf2b760811c8f3d20185a8da1 Mon Sep 17 00:00:00 2001
From: Jens Heise <jh@joost-co.de>
Date: Thu, 7 May 2020 00:26:03 +0200
Subject: [PATCH] Bugfix in ZUGFeRD2PullProvider.generateXML(): Only Debit
 payment information is part of 'SpecifiedTradePaymentTerms'

so test for 'payment' being an instance of 'IZUGFeRDTradeSettlementDebit' as
'IZUGFeRDTradeSettlement' and 'IZUGFeRDTradeSettlementPayment' return 'null' for
'getPaymentXML()' which is not allowed to be written to the XML file.
---
 .../java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java   | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
index c840303f..76c43125 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
@@ -510,7 +510,7 @@ public class ZUGFeRD2PullProvider implements IXMLProvider, IProfileProvider {
 
 			if (trans.getTradeSettlement() != null) {
 				for (IZUGFeRDTradeSettlement payment : trans.getTradeSettlement()) {
-					if (payment != null) {
+					if ((payment != null) && (payment instanceof IZUGFeRDTradeSettlementDebit)) {
 						xml += payment.getPaymentXML();
 					}
 				}