I have an object like this:
class Foo {
Map<String, String[]> map;
}
using JsonInclude.NON_EMPTY in the default serializer.
Suppose that map = {"key": []}. What is the expected serialization? Should
"key": [] be present in the output JSON?
I can see two arguments:
- Option A: map is a property of Foo, but "key" is just part of its value.
It's not a property, so "map: {"foo": []}" should appear in the result JSON.
- Option B: JSON doesn't really distinguish Objects and Maps, so we treat
both foo.map and map.get("key") as JSON properties. According to NON_EMPTY,
"key" should be omitted.
The current behavior is Option B, which I found surprising at first when
reading the NON_EMPTY documentation. Wondering if this is a conscious
choice and the expected behavior, or a bug, or something else?
Thanks!
Dan
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