Mapper array to List example #121
Description
Hi,
Would be nice to have an example that shows the usage of MapStruct with array (like int[] ) to immutable list with specific add and addAll (like in protobuf).
example:
proto file
message UserDTO {
string id = 1;
string email = 2;
repeated PermissionDTO permissions = 3;
repeated DepartmentDTO main_departments = 4;
repeated DepartmentDTO departments = 5;
}
java file
public class User {
private String id;
private String email;
private Permission[] permissions = new Permission[0];
private List<Department> mainDepartments = new ArrayList<>();
private List<Department> departments = new ArrayList<>();
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Permission[] getPermissions() {
return permissions;
}
public void setPermissions(Permission[] permissions) {
this.permissions = permissions;
}
public List<Department> getDepartments() {
return departments;
}
public void setDepartments(List<Department> departments) {
this.departments = departments;
}
public List<Department> getMainDepartments() {
return mainDepartments;
}
public void setMainDepartments(List<Department> mainDepartments) {
this.mainDepartments = mainDepartments;
}
}
Mapper
@Mapper(collectionMappingStrategy = CollectionMappingStrategy.ADDER_PREFERRED,
nullValueCheckStrategy = NullValueCheckStrategy.ALWAYS)
public interface UserMapper {
UserMapper INSTANCE = Mappers.getMapper(UserMapper.class);
@Mapping(source = "permissions", target = "permissionsList")
@Mapping(source = "mainDepartments", target = "mainDepartmentsList")
@Mapping(source = "departments", target = "departmentsList")
UserDTO map(User user);
}
Error:
Can't map property "Permission[] permissions" to "PermissionDTO permissionsList".
### Desired solution:
public class UserMapperImpl implements UserMapper {
@Override
public UserDTO map(User user) {
if ( user == null ) {
return null;
}
Builder userDTO = UserDTO.newBuilder();
if ( user.getPermissions() != null ) {
for ( Permission permission : user.getPermissions() ) {
userDTO.addPermissions( map( permission ) );
}
}
...
return userDTO.build();
}
}
or
public class UserMapperImpl implements UserMapper {
@Override
public UserDTO map(User user) {
if ( user == null ) {
return null;
}
Builder userDTO = UserDTO.newBuilder();
if ( user.getPermissions() != null ) {
userDTO.addAllPermissions( map( user.getPermissions()) );
}
...
return userDTO.build();
}
}
Is it possible to do this with actual release?