FrankChen021 commented on code in PR #12177:
URL: https://github.com/apache/druid/pull/12177#discussion_r985040098
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core/src/main/java/org/apache/druid/java/util/common/parsers/ObjectFlatteners.java:
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@@ -231,6 +235,11 @@ public Map<String, Object> toMap(T obj)
*/
Function<T, Object> makeJsonQueryExtractor(String expr);
+ /**
+ * Create a "field" extractor for nested json expressions
+ */
+ Function<T, Object> makeJsonTreeExtractor(List<String> nodes);
Review Comment:
Do we need to care about an interface which is not marked as
`ExtensionPoint`? Although we can add a default implementation for this
interface. Another question is should we mark it as `ExtensionPoint`?
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