FrankChen021 commented on issue #12912:
URL: https://github.com/apache/druid/issues/12912#issuecomment-1220578198
If we want to fix the problem from root, I think we need to make changes to
Event interface to make the special serialization process to be unvisible to
callers.
My suggestion is as follows
```java
public interface Event {
CustomerMap toMap();
...
}
class ACustomerMap extends HashMap<String, Object> {
// a dedicated method to serialize this object into JSON string to
avoid missing type info in the final text
public String toJSONString() {
}
}
```
Since `ACustomerMap` inherits Map<String, Object>, it makes current code
where this method is called compatible with this new class.
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