gianm commented on code in PR #13064:
URL: https://github.com/apache/druid/pull/13064#discussion_r967858135
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core/src/main/java/org/apache/druid/data/input/impl/CloudObjectInputSource.java:
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@@ -83,26 +84,30 @@ public CloudObjectInputSource(
}
@JsonProperty
+ @JsonInclude(JsonInclude.Include.NON_NULL)
Review Comment:
Interesting idea. It would save a lot of thinking about specific properties.
My first thought is that I wonder if it is always safe? Certainly,
`NON_DEFAULT` and `NON_EMPTY` across the board aren't always safe; there are
various classes where passing in `null` vs `false` for a Boolean, or `null` vs
`0` for an Integer, mean different things. `NON_NULL` seems safe at first
glance, although I haven't thought about it very hard yet.
My second thought is that I wonder if it can be overridden in some cases.
There are some cases where serializing a null value is more beautiful, like a
selector filter that has `value` set to `null`. (Otherwise, it would serialize
as `{"type":"selector"}` with no value, which while correct, definitely looks
strange.)
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