Add custom handling of protobuf target conversion using Mapstruct SPI

Background

• SPI = Service Provided Interface
• Mapstruct provides the interface to override the default naming strategy implementation used to extract info for mapping

Problem

1. When the target is protobuf and all target fields must be mapped, there is an issue specifically with protobuf because there are fields such as mergeFrom, clearOneOf, which mapstruct labels as fluent setters and so looks to find the associated field, but doesnt find any.

• FluentSetter definition
• Usage of isFluentSetter in getPropertyName

2. Also, becuase protobuf setter names use setCarList instead of setCars, inorder to be compatible with lombok, this needs to be overrided too

Solution

• Solution to 1

  • Override so that if its a protobuf message, isFluentSetter always returns false, otherwise works as normal.
  • will eliminate the mergeFrom, clearOneOf issue you get when converting with mapstruct
  • Using Mapstruct SPI
  • Example Repo of Creating Custom Naming Strategy
    • refer to src/main/resources/META-INF/services for overriding the defaul accessor naming strategy
    • refer to ProtobufAccessorNamingStrategy

• Solution to 2

  • Can fix the List issue using the exact example in ProtobufAccessorNamingStrategy