ASTDiff: Add a null check for common comments

tsantalis · Oct 2, 2024 · f8d5900 · f8d5900
1 parent 2f24a8b
commit f8d5900
Showing 1 changed file with 7 additions and 5 deletions.
diff --git a/src/main/java/org/refactoringminer/astDiff/matchers/wrappers/CommentMatcher.java b/src/main/java/org/refactoringminer/astDiff/matchers/wrappers/CommentMatcher.java
@@ -20,11 +20,13 @@ public CommentMatcher(UMLCommentListDiff commonComment) {
 
     @Override
     public void match(Tree srcTree, Tree dstTree, ExtendedMultiMappingStore mappingStore) {
-        for (Pair<UMLComment, UMLComment> commonComment : commentListDiff.getCommonComments()) {
-            Tree srcComment = TreeUtilFunctions.findByLocationInfo(srcTree, commonComment.getLeft().getLocationInfo());
-            Tree dstComment = TreeUtilFunctions.findByLocationInfo(dstTree, commonComment.getRight().getLocationInfo());
-            if (srcComment != null && dstComment != null) {
-                mappingStore.addMapping(srcComment, dstComment);
+        if (commentListDiff.getCommonComments() != null) {
+            for (Pair<UMLComment, UMLComment> commonComment : commentListDiff.getCommonComments()) {
+                Tree srcComment = TreeUtilFunctions.findByLocationInfo(srcTree, commonComment.getLeft().getLocationInfo());
+                Tree dstComment = TreeUtilFunctions.findByLocationInfo(dstTree, commonComment.getRight().getLocationInfo());
+                if (srcComment != null && dstComment != null) {
+                    mappingStore.addMapping(srcComment, dstComment);
+                }
             }
         }
     }