jasonk000 commented on a change in pull request #12177:
URL: https://github.com/apache/druid/pull/12177#discussion_r819147514
##########
File path:
core/src/main/java/org/apache/druid/java/util/common/parsers/JSONFlattenerMaker.java
##########
@@ -108,6 +108,22 @@ public Object getRootField(final JsonNode obj, final
String key)
}
}
+ @Override
+ public Function<JsonNode, Object> makeJsonTreeExtractor(final List<String>
nodes)
+ {
+ String[] keyNames = nodes.toArray(new String[0]);
Review comment:
It's a defensive copy in case the caller does something to change the
`List<>`. It does not need to be to an array if a List is preferred.
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