MapStruct generates code at compile-time and it should not require any runtime dependencies: How is MapStruct different from other bean mapping tools? Unlike most other bean mapping tools, MapStruct doesn’t work at runtime but is a compile-time code generator. Generating mapping code at build time has many ad…
Tag: mapstruct
How to map multiple enums to string (and back) using their common property with MapStruct?
I have two enums with common property – id: And I need generic MapStruct mapping of such enums (without need to define mapping of every such enum). Answer Yes, it’s possible through @TargetType annotation. You need a common interface for such enums: Then you need to be able to create enum of such …
Use another MapStruct mapper only inside an expression clause
I have a mapper that, for a particular attribute of the target class, needs to choose one from a list of objects inside the source object, and map it using a differente mapper class. Simplifying it a lot, the Game class contains a list of Transaction objects, and my GameMapper class looks like this: The thing…
Can I extend MapStruct methods?
I’m developing a library and I expect the library to have a mapper like so: Which is meant for internal remapping. Now, I’d like to add a feature where the user can “override” this method, in the sense that they could for example add a statement to ignore the password of the account, w…
Spring Boot Mapstruct not woking mapping
My Dto model My main model My mapstruct class Hi everyone my project using mapstruct but my dto class user_id not mapping user please help me Thanks Answer This should solve the problem: Because you’re wanting to map user_id from CoverLetterDto to the User class in CoverLetter, you have to use dot notat…
MapStruct Java: property to list
Shortly, I’d like to move this code inside a mapstruct mapper: I’d like to have: Details My source class: where Results is: And ResultType: My Service class is getting a ResultSetType object from my Repository: I need to map resultSetType to List<Provincia>. So, I need to map resultSetType.r…
MapStruct mapper based on type
Consider the following simplified structure (that has both a DO and a DTO for each): For both I have a mapper that does the mapping between the DO and DTO, However, I am facing a problem and don’t really know how to handle it. If for the MotherboardComponent in the list I have another MotherboardCompone…
MapStruct + Kotlin/JVM(v1.5.10) Error: The return type Flow is an abstract class or interface
My project uses MapStruct successfully when it does not include Flux or Flow streams. When I try to generate a mapper with a Flow or Flux, I receive an error: “error: The return type Flow is an abstract class or interface.” Since Flow and Flux are interfaces, is there a way to still use MapStruct …
Mapstruct: Returning null when trying to map a field inside an embedded object
We were given an assignment to recreate a simple version of the Twitter API in Spring using Mapstruct. We are returning a List<UserDto> that should return the field username from the embedded object Credentials. We mapped this as follows: Our UserDto is specified like this: Our User entity has an embedd…
nullValuePropertyMappingStrategy not working
I have the following mapper The pokerRoomDto which is passed to it has a “phase” field which can be null. I want this field to be ignored when it is null. But right now the “null” value still gets mapped to the pokerRoom entity. If I just ignore the field in the mapper it works and the…