AbstractChangeNotes: mark readRef @Nullable

Change-Id: I37f156cda6fcc01e042811a714b24eef0aac39db
2019-09-02 11:30:25 +02:00
parent db3146bdaa
commit dfa596adac
1 changed files with 1 additions and 0 deletions
--- a/java/com/google/gerrit/server/notedb/AbstractChangeNotes.java
+++ b/java/com/google/gerrit/server/notedb/AbstractChangeNotes.java
@@ -153,6 +153,7 @@ public abstract class AbstractChangeNotes<T> {
    return self();
  }

+  @Nullable
  protected ObjectId readRef(Repository repo) throws IOException {
    Ref ref = repo.getRefDatabase().exactRef(getRefName());
    return ref != null ? ref.getObjectId() : null;