* Fix TypeAdapterRuntimeTypeWrapper not detecting reflective TreeTypeAdapter
Previously on serialization TypeAdapterRuntimeTypeWrapper preferred a
TreeTypeAdapter without `serializer` which falls back to the reflective
adapter. This behavior was incorrect because it caused the reflective
adapter for a Base class to be used for serialization (indirectly as
TreeTypeAdapter delegate) instead of using the reflective adapter for
a Subclass extending Base.
* Address review feedback
* Convert TypeAdapterRuntimeTypeWrapperTest to JUnit 4 test
* Prefer wrapped reflective adapter for serialization of subclass
* Detect reflective adapter used as delegate for Gson.FutureTypeAdapter
* Tiny style tweak.
Co-authored-by: Éamonn McManus <emcmanus@google.com>
The JsonSerializer/Deserializer adapters used to ignore this attribute
which result in inconsistent behaviour for annotated adapters.
Fixes#1553
Signed-off-by: Dmitry Bufistov <dmitry@midokura.com>
Co-authored-by: Dmitry Bufistov <dmitry@midokura.com>
* Improve TreeTypeAdapter thread-safety
Gson claims to be thread-safe so TreeTypeAdapter.delegate() might be
called by multiple threads. To guarantee that each thread sees a fully
constructed `delegate`, the field has to be `volatile`.
* Improve TreeTypeAdapter thread race comment
