The removal of manual collection value appendance for primitives in the context of GH-2261 lead to complex object to be appended onto a collection not being deserialized at all. This deserialization is now reinstantiated with the value to be added looked up by reading the parent node into the collections element type using a JSON Pointer expression of /$propertyName/$index. This is done to make sure that @JsonDeserialize annotations on the property kick in for the deserialization of the individual elements.
We now also shortcut the entire merge algorithm for collections that are empty, contain primitives or enums.
Fixes GH-2287.
1fadf164ae