- Get rid of TypeLiteral<T>. It was introduced to read the component
type of a List<T> at runtime. But we use arrays everywhere else,
and we can always read the component type of an array type at
- Properly read/write "minor" types (e.g. sint32, sfixed32). The old
implementation could only read/write data as the "typical" types
(one per Java type), e.g. java.lang.Integer -> int32, java.lang.Long
-> int64. So if e.g. an extension specifies sfixed32 as the type, it
would be read/written in the totally incompatible int32 format.
- Properly serialize repeated packed fields. The old implementation
doesn't do packed serialization. As an added bonus, and to be more
aligned with the rest of protobuf nano / main, repeated packable
extensions can deserialize both packed and non-packed data.
- Split Extension class into a hierarchy so under typical usage a
large chunk of code dealing with primitive type extensions can be
removed by ProGuard.