Github user LosD commented on a diff in the pull request: https://github.com/apache/metamodel/pull/160#discussion_r136401855 --- Diff: core/src/main/java/org/apache/metamodel/schema/MutableRelationship.java --- @@ -134,4 +139,17 @@ private MutableRelationship(List<Column> primaryColumns, List<Column> foreignCol return _foreignColumns; } + private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException { + final GetField getFields = stream.readFields(); + Object primaryColumns = getFields.get("_primaryColumns", null); + Object foreignColumns = getFields.get("_foreignColumns", null); + if (primaryColumns instanceof Column[] && foreignColumns instanceof Column[]) { --- End diff -- In that case, LGTM! I'll merge
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