Automatically detect camelCase and snake_case propreties.

Use case

Currently when mapping between 2 objects where field name only differ in their case styles like:

public class CamelCase {
Long id;
String someString;
}

public class SnakeCase {
Long id;
String some_string;
}

The mapper needs to be manually configured to associate someString and some_string.

Generated Code

No response

Possible workarounds

For now I'm manually defining @Mapping annotations for the fields:

    @Mapping(target = "preparationTime", source = "preparation_time")
    @Mapping(target = "menuCategoryId", source = "menu_category_id")

MapStruct Version

1.6.0.Beta1

No source file or test is named in the issue. Start by locating MapStruct's mapping-resolution logic and existing tests for differently named properties; define the expected camelCase-to-snake_case behavior and add coverage showing that manual @Mapping annotations are no longer required.