From f280cf058946ee2c7f92e6348b48d424d6038a33 Mon Sep 17 00:00:00 2001
From: "Jan N. Klug" <github@klug.nrw>
Date: Wed, 11 Sep 2024 09:22:51 +0200
Subject: [PATCH] Fix UnsupportedOperationException in buildNotes

Signed-off-by: Jan N. Klug <github@klug.nrw>
---
 .../org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java     | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
index f98674c4..1ff406f4 100644
--- a/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
+++ b/library/src/main/java/org/mustangproject/ZUGFeRD/ZUGFeRD2PullProvider.java
@@ -864,8 +864,9 @@ public class ZUGFeRD2PullProvider implements IXMLProvider {
 	}
 
 	protected String buildNotes(IExportableTransaction exportableTransaction) {
-		final List<IncludedNote> includedNotes = Optional.ofNullable(exportableTransaction.getNotesWithSubjectCode())
-			.orElse(new ArrayList<>());
+		final List<IncludedNote> includedNotes = new ArrayList<>();
+		Optional.ofNullable(exportableTransaction.getNotesWithSubjectCode()).ifPresent(includedNotes::addAll);
+
 		if (exportableTransaction.getNotes() != null) {
 			for (final String currentNote : exportableTransaction.getNotes()) {
 				includedNotes.add(IncludedNote.unspecifiedNote(currentNote));