Hi, I am new to mapstruct and have a question on mapping a field on a nested object.
Source is
class SourceA {
String field1;
SourceB fieldB;
}
class SourceB {
String field1;
String field2;
String field3;
}
Target class structure is somewhat similar to source, however, it has a fieldX in class TargetB which requires special mapping.
class TargetA {
String field1;
TargetB fieldB;
}
class TargetB {
String field1;
String field2;
String field3;
String fieldX; // X's value is a based on some if/else conditions on field1, 2 etc.
}
When I do a mapping, how can i specify that fieldX needs to be mapped using some special hand coded logic?
@Mapper
MyMapper {
TargetA sourceAToTargetA(SourceA source)
@Mapping(source = "<what do i put here to invoke special logic just for fieldX>", target = "fieldX")
TargetB sourceBToTargetB(SourceB source)}
@Named annotation: http://mapstruct.org/documentation/stable/reference/html/#selection-based-on-qualifiers
@Named methods could be passed context objects and @MappingTarget objects since the logic involved requires access to the existing object.
@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE, uses = [RoleMapper::class])
abstract class EmployeeMapper : UuidMapper() {
@Mappings(
Mapping(source = "employee.id", target = "employee.id", qualifiedByName = ["uuidToString"])
)
abstract fun employeeResponseToGrpcEmployeeResponse(resp: GetEmployeeResponse): GetOneEmployeeResponse
}
@Mapper(unmappedTargetPolicy = ReportingPolicy.IGNORE)
abstract class RoleMapper : UuidMapper() {
@Mappings(
Mapping(source = "locationId", target = "locationId", qualifiedByName=["uuidToString"])
)
abstract fun roleResponseToGrpcRole(resp: RoleResponse): Role
}
abstract class UuidMapper {
@Named("uuidToString")
fun uuidToString(uuid: UUID): String {
return uuid.toString()
}
}
UuidMapper and thus have the same method twice for UUID to String. I would suggest that you define your own class / interface with a static method and then use it via Mapper#uses both in RoleMapper and EmployeeMapper
Hey guys, quick question: is it possible to map one target property to multiple source properties? I get the following error: "Error:(17, 17) java: Target property "countryOfResidence" must not be mapped more than once."
What I am trying to do:
@Mapping(source = "CountryOfResidence", target = "countryOfResidence")
@Mapping(source = "Nationality", target = "countryOfResidence")
UserNatural mapToMangoPayUser(UserModel user);
Hi all - I've got a question about mapping collections -- I am trying to map a java.util.List<T> to a custom collection CustomList<R>. The CustomList is used in a wide variety of places for different types, and the contents of the List need to also be mapped before being put into a CustomList.
I want to define the mappings from T to R, but not need to define the mappings from one list to another. Is there a good way to do this generically?
instanceofs to explicitly select the mapping functions for each child object
this from the method body to do the callback. If you implement it in a used mapper you probably need the mechanism proposed in #1637
@TumanovViktor you can also implement a mapping method
@Qualifier
@Target(ElementType.METHOD)
@Retention(RetentionPolicy.CLASS)
public @interface Invert {
}
@Invert
default boolean invert( boolean arg ) { return !arg }to trigger this method only in this scenario you use the qualifier:
@Mapping(source = "alive", target = "dead", qualifiedBy=Invert.class)