Java-Mapping-With-Mapstruct/Help.txt at master · manojsatna31/Java-Mapping-With-Mapstruct · GitHub

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https://gemini.google.com/app/6296525182a9e7c0


https://reflectoring.io/java-mapping-with-mapstruct/

https://docs.google.com/document/d/1va_nW4pbLAdxTCLbbjgPKEtqvxiSBUS2xXo7_7CWIjg/edit?tab=t.0


---------------
https://reflectoring.io/java-mapping-with-mapstruct/
https://github.com/thombergs/code-examples/tree/master/mapstruct

https://stackabuse.com/guide-to-mapstruct-in-java-advanced-mapping-library/

https://github.com/mapstruct/mapstruct-examples/blob/main/mapstruct-lombok/src/main/java/com/mycompany/mapper/SourceTargetMapper.java

https://medium.com/javarevisited/make-your-life-easier-with-mapstruct-lombok-14225f207191

https://github.com/Milena92/mapstruct-lombok-demo/blob/main/src/main/java/com/milena/mapstructlombokdemo/mapper/AddressMapper.java


Issue:
Builder not available to other Annotation Processors
https://github.com/projectlombok/lombok/issues/1538
@AfterMapping not called for target beans with builder #1862
https://github.com/mapstruct/mapstruct/issues/1862
Clarify documentation about builders and lifecycle @AfterMapping / @BeforeMapping methods
https://github.com/mapstruct/mapstruct/issues/2719

Solution :

1) Disable @Builder
#####################################################################
---------
@Mapper(builder = @Builder(disableBuilder = true))
public interface EntityToDtoMapper {
-------------
@BeforeMapping
default void enrichOrganizationName(Department source, @MappingTarget DepartmentDto target) {
  target.setOrganizationName(source.getName().toLowerCase(Locale.ROOT));
  System.out.println("Before Mapping:"+target);
}
----------
@AfterMapping
default void enrichOrganizationNameWithSuffix(Department source, @MappingTarget DepartmentDto target) {
  target.setOrganizationName(source.getName().toLowerCase(Locale.ROOT)+"_DEPT");
  System.out.println("After Mapping:"+target);
}
--------------
Generated Impl:
--------------
@Override
  public DepartmentDto toDto(Department source) {
      if ( source == null ) {
          return null;
      }

      DepartmentDto departmentDto = new DepartmentDto();

      enrichOrganizationName( source, departmentDto );

      Set<Employee> set = source.getEmployees();
      if ( set != null ) {
          departmentDto.setEmployeeName( new LinkedHashSet<Employee>( set ) );
      }
      departmentDto.setOrganizationName( sourceOrganizationName1( source ) );
      departmentDto.setName( source.getName() );

      enrichOrganizationNameWithSuffix( source, departmentDto );

      return departmentDto;
  }


#############################################################################################
2) @AfterMapping/@BeforeMapping annotated method must have the builder as @MappingTarget annotated parameter
#####################################################################
@Mapper
public interface EntityToDtoMapper {

@BeforeMapping
default void enrichOrganizationName(Department source, @MappingTarget DepartmentDto.DepartmentDtoBuilder target) {
  target.organizationName(source.getName().toLowerCase(Locale.ROOT));
  System.out.println("Before Mapping:"+target);
}

@AfterMapping
default void enrichOrganizationNameWithSuffix(Department source, @MappingTarget DepartmentDto.DepartmentDtoBuilder target) {
  target.organizationName(source.getName().toLowerCase(Locale.ROOT)+"_DEPT");
  System.out.println("After Mapping:"+target);
}
--------------
Generated Impl:
--------------
@Override
    public DepartmentDto toDto(Department source) {
        if ( source == null ) {
            return null;
        }

        DepartmentDto.DepartmentDtoBuilder departmentDto = DepartmentDto.builder();

        enrichOrganizationName( source, departmentDto );

        Set<Employee> set = source.getEmployees();
        if ( set != null ) {
            departmentDto.employeeName( new LinkedHashSet<Employee>( set ) );
        }
        departmentDto.organizationName( sourceOrganizationName1( source ) );
        departmentDto.name( source.getName() );

        enrichOrganizationNameWithSuffix( source, departmentDto );

        return departmentDto.build();
    }