return code; I have a code that I've got from service and I want to convert this code to Enum how to do it with easier way by mapstruct. To format the data for readability and more integration, I have used Mapstruct. If you want to just get a reference to mapper you can use. class}) public interface HistoryMapper {. mainAnimal is a DogDTO, mapstruct does not implicitly convert that into an AnimalDTO. getMappers(CurveMapper. ReportingPolicy. I added a mapping for Object so that I could just pass the Object that I get in the interceptor rather than casting it to one of the types that I have a mapping for, however, it doesn't work, it is not In mapstruct 1. kt @Mapper(componentModel = &quot;spring&quot;) abstract class BookMapper { @Autowired lateinit var Jul 6, 2018 · 60. SourceClassModel sourceClassModel = new SourceClassModel(); Aug 21, 2022 · MapStruct allows you to map the entire target object to a particular source reference. . Mapstruct is a code generator. MapStruct automatically creates intermediate methods for mapping between an array and a List. To use this bean to retrieve weight info inside the mapper interface should be replaced with an Oct 3, 2021 · 1. class); B AtoB(A entity); } Should generated: public class AMapperImpl implements AMapper {. How to map objects as fields with mapstruct? 4. For some reason it seems to be missing in your deployment unit (WAR etc Jan 14, 2024 · Seems it's Lombok issue. You can do subclass mapping by adding some after mapping methods like the following: @Mapper () public interface SuperClassMapper { SubClassMapper SUBCLASS_MAPPER_INSTANCE = Mappers. Use Mockito. MapStruct will not inject mappers from Mapper#uses if they are not used by MapStruct. MapStruct takes the sting out of mapping entities to DTOs, and Java records make for elegant DTOs. rest. Here the entity with the attribute: public class Group { private IUser user; } Here the DTO: Mar 26, 2020 · How do i use MapStruct mapping for this case? abstract class Person: private String name; private String somethingToIgnore. class) can be used to automatically inject objects Feb 8, 2022 · 5. objects. return "DEFAULT-1" ; We want to test the method defaultImpl (), and we have two possible solutions – using a concrete class, or using Mockito. MyMapper INSTANCE = Mappers. Feb 1, 2018 · I want to convert String to enum using mapstruct. This guide covers all the functionality provided by MapStruct. Run the application. What you have defined with: public interface AMapper {. Jan 16, 2024 · MapStruct. This is possible with lombok 1. Generic Wildcards with Map. @AfterMapping is not much useful though you pass a Builder object, since we can't retrieve the processed values. data. You can have @AfterMapping and @BeforeMapping in your context where you can store the Order id and use that during its execution. class}) public abstract class GameMapper {. protected String currentOrderId; Nov 28, 2023 · After the build, while mapping the list AnotherJavaClassInProto in the class generated by MapStruct, I'm applying the following method to create a new list from AnotherJavaClassInProto found inside the proto: 0. During compilation, MapStruct will generate an implementation of this interface. Consider to declare/implement a mapping method: "ArrayList map (ArrayList value)". public abstract class DeviceDataMapper {. What you could do is to use an abstract class. Example 1: Creating mapper @Mapper public interface CarMapper { CarDto toCarDto(Car source); } Example 2: Use additional mappers with parameters uses(), componentModel() and injectionStrategy() May 30, 2024 · Methods in an interface are implicitly abstract if they are not static or default and all are public. I am trying to build a REST Controller using Spring. In this tutorial, we’ll learn how to construct complex mappers built with simple ones and map nested structures. IGNORE, uses = {MappingUtil. Specifies a decorator to be applied to a generated mapper, which e. Dec 1, 2021 · In this case you do not need to manually define the injection, because all the actions on the injected class are handled by MapStruct. An abstract class is nothing but a class that is declared using the abstract keyword. class, EventMapper. In Java 14, there were added record classes. You mapper would look like: @Mapper (componentModel = "spring") public abstract class RequestMapper { @Mapping (target = "Id", source = "Id") @Mapping (target = "data", source = "variables") public Jan 18, 2024 · 2. Provide details and share your research! But avoid …. A typical decorator implementation will be an abstract class and only implement/override a subset of the methods of the mapper type which it decorates. 👍 2. @RunWith(MockitoJUnitRunner. class); // Mappings entity to dto / dto to entity May 17, 2020 · 4. Due to "business" "logic", I need to constrain notificationPeriod and schedulePeriod to a Lecture's start and end field values. There is no way around putting @SuperBuilder on all subclasses, because Lombok cannot know all subclasses at compile time. If this all fails MapStruct tries to do a number of 2 step approaches: mapping method - mapping method. nodes. Ambiguous mapping methods using java Mapstruct. ) Were I in your position, I would create a small override implementation for testing: Mar 29, 2019 · 2. getMapper(DeviceDataMapper. 1)The MapStruct has good feature: @Mapper(componentModel = "spring", uses ={ObjectMapper. dto. AUTO_INHERIT_FROM_CONFIG. Based on our declarations, MapStruct will generate the mapping code automatically. core. public class CustomMapper {. util. Having said that, you could do this smarter by using a base mapping method on which you define all the @Mapping annotations and ignore the generic type mapping. This was my older solution (It is a simple example) @Mapper. can be used to amend mappings performed by generated mapping methods. artcurial. Mapping Collections. getMapper(DeviceTokensMapper. public abstract HeaderDTO toDTO(Aggregator aggregator); May 5, 2024 · MapStruct is a Java annotation processor that comes in handy when generating type-safe and effective mappers for Java bean classes. An abstract class is one which is just like a regular class but can contain some 'stub' - or abstract - methods. Here's how I wrote Mapper. Feb 6, 2022 · How to using mapstruct and springboot bean together? @autowired. class); DTOIntPerson personToDTOIntPerson(Person person); } When I build the programm there's no error, but the classes aren't being generated. However, starting with Java 9, we can also add private methods in interfaces. Beta1 and Lombok 1. Example: public Result methodUnderTest() { Nov 10, 2023 · Here’s an explanation of how to use MapStruct in a Spring Boot application with examples. Dec 2, 2014 · For example (one abstract class and two concrete classes): public abstract class Animal { private String name; } public class Cat extends Animal { private Boolean mouseCatcher; } public class Dog extends Animal { private Integer Jan 16, 2014 · Yes, as of MapStruct 1. 18. class); com. 3. May 16, 2016 · However the generated collection mapping method does not use the decorated method to map each entity, is just uses the "vanilla" generated method on the delegate. I deciced to transform the mapper from interface to abstract, in order to use a component names AddressConverter that itself is using a component named CountryService. Nov 13, 2021 · 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, while also calling the internal methods. It needs to be extended and its method implemented. It is recommended to obtain mapper objects via (Personally, I was previously in favor of real partial mocks of abstract classes as a "tool in the toolbox", but I'm coming around to thinking they're too far removed from reality to be useful. Jun 16, 2022 · architecture / Spring / Java. MapStruct is a Java annotation processor for the generation of type-safe bean mapping classes. Project Lombok is an annotation processor that (amongst other things) adds getters and setters to the AST (abstract syntax tree) of compiled bean classes. AST modifications are not foreseen by Java annotation processing API, so quite some trickery was required within Lombok as well as Jul 23, 2013 · To elaborate on @kevolution's answer: public void itemStateChanged(ItemEvent e) {. Step 1: Setting up your Spring Boot project. public String getCode() {. The decorator must be a sub-type of the decorated mapper type. Here's the main mapping method: @Mapping(target = "myTarget. May 25, 2018 · What you can do instead is to use the @Context and perform your logic in it. Jun 8, 2022 · MapStruct allows to define a Decorator class and annotate it with @DecoratedWith annotation. graphql. Aug 4, 2020 · The solution was to use a Decorator as suggested in this answer. @Mapping(target = ". public Set<DimensionItemTreeDTO> missionSetToTreeDtoSet(Set<Mission> set) {. Illustration of Abstract class. The generated mapping code uses plain method invocations and thus is fast, type-safe and easy to understand. All you have to do is to define a mapper interface which declares any required mapping methods. entity. Aug 10, 2015 · MapStruct generates code at compile time, and the call to Mappers. // Write your method here. it finds 2 qualifying methods ( Program to String ). domain. How do you tell MapStruct to choose the concrete class based on the value of the discriminator field in the source class ? Method signature would typically be : Jun 17, 2022 · error: The return type List<DomainClass> is an abstract class or interface. For abstract classes or decorators setter injection should be used. Basically, we have to create a simple interface or abstract class, and declare the mapping methods. An abstract class is declared using the “abstract” keyword in its class definition. Typically, the generated code will loop over the Mar 9, 2018 · 基本編。 環境 MapStruct : 1. CurveMapper INSTANCE = Mappers. e. Final Java : 9 JUnit : 4. mapstruct Introduction. code = code. 5 (currently latest supported) and try to add this annotation processor config to your build Gradle file. Sep 4, 2018 · I have mappings for all my different type of requests however since it is at the interceptor level I get a java Object for the request model. In general, mapping collections with MapStruct works the same way as for simple types. Here is some sample code @Component @RequiredArgsConstructor public class Parent{ private final ServiceA serviceA; private final ServiceB serviceB; . CONSTRUCTOR, uses = {IdentifierMapper. Step2 :- Go to Properties. Marks an interface or abstract class as a mapper and activates the generation of a implementation of that type via MapStruct. propX needs to be set to value "XYZ" and so forth. Curve map(com. Curve dtoCurve); } The build fails asking for concrete class/Object factory for Axis class. class, PostRepository. MapStruct is a library that helps us to minimize boilerplate code when dealing with Java Beans mapping. First, we have to specifiy the Decorator in the Mapper: @Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy. // Not intended to be generated, but to carry inheritable mapping annotations: @Mapping(target = "targetId", source = "id") ParentDto You can, however, use an abstract class instead which is fully compatible with MapStruct class generating including the Spring component model. 9. IGNORE, collectionMappingStrategy = CollectionMappingStrategy. Jan 7, 2019 · Error:(53, 18) java: The return type java. 1. class) How can I inject ReadProcessor class while writing test case for BookMapper BookMapper. So i'm confused and really need some help. 16. At 6. Don't take my word for it. Now, in my target class there is a attribute named, MyTicket myTicket; which, I need to map with an attribute of TicketDetails object. @Mapper(unmappedTargetPolicy = ReportingPolicy. ", source = "header". All you need to define is how to manually collect the result of the conversion. mvn clean install. Jul 20, 2018 · 1. int color; // An abstract function. Jun 9, 2020 · Simply initialize the Mapper private UserMapper userMapper = new UserMapperImpl() (and remove @Spy) When using the second approach you can even remove the @SpringBootTest because in the given snippet you do not need a Spring context (created by the annotation). 0. I believe there's some problem with my pom, probably there’s something missing or misplaced in the build/plugin : Nov 25, 2019 · 6. Dec 1, 2017 · I made some research in the mapStruct documentation but did not find or understood what I could do to achieve this: the conversation of an entity containing an interface to a flat DTO object. ADDER_PREFERRED, nullValueCheckStrategy Error: (14, 14) java: The return type com. Instead I have used the custom method in my mapper to resolve this issue. public @interface DecoratedWith. propA has the value "ABC" myTarget. @MapperConfig(. public abstract class FarmMapper {. 2. PropertyNode; Jul 6, 2009 · 377. A class which is declared as abstract is known as an abstract class. Data. I could use solution mentioned here mapstruct - Propagate parent field value to collection of nested objects - either directly after mapping to set some value to the child object or to use context. The following suggestion lets you test abstract classes without creating a "real" subclass - the Mock is the subclass and only a partial mock. //Getter and Setter. Java and MapStruct. Documentation says: The generated mapper will inject all classes defined in the uses attribute. Apr 27, 2023 · A mapper's method signature must provide the reference decorated with @Context annotation for a qualifiedByName method to use the context. Aug 31, 2020 · public interface CurveMapper {. Following your code, the solution would be something like the following. Maven Dependencies. partNumber", ignore = true) public MyTarget mapSource2Target(final MySource mySource, final PartNumberMapConfiguration partNumberMapConfiguration); Jun 9, 2016 · Using MapStruct, I created a mapper that maps XmlSchedule to a SchedulePayload. Even though the mapping works fine, on unit test it complains about the component AddressConverter that cannot find Introduction. mapstruct. . Jun 1, 2018 · Imagine a target abstract class CarEntity with two subclasses SUV and City and a source class CarDto with a discriminator field type with two enumeration constants SUV and CITY. java generated by mapstruct. Returns: The conversion string from source to target; defaultFormatterSuffix protected abstract String defaultFormatterSuffix() getFromExpression MapStruct is a code generator that greatly simplifies the implementation of mappings between Java bean types based on a convention over configuration approach. xml: To see the auto-generated methods inside the project’s target folder, we have to add the annotationProcessorPaths to the maven-compiler-plugin plugin: 3. Class DataDomainClass: public class DataDomainClass{ private List<DomainClass> data; } Class EntityClass: Jun 9, 2017 · So whenever you want to use CompanyMapper than you only need to autowired it as we use @Mapper(componentModel = "spring") so spring boot can able to inject this. backoffice. Jul 3, 2023 · How To Use MapStruct With Java’s Records. I using MapStruct to map my entities, and I'm mocking my objects using Mockito. Mar 12, 2024 · java: The return type AbstractQuestionnaireDTO is an abstract class or interface. From what I understand you want to map your values into a singleton list. Abstract method: can only be used in an abstract class, and it does not have a body. If you use @Context you'll have to pass it to all the methods you need. Item is an abstract class or interface. See Mapstruct documentation:To allow mappings for abstract classes or interfaces you need to set the subclassExhaustiveStrategy to RUNTIME_EXCEPTION, you can do this at the @MapperConfig, @Mapper or @BeanMapping annotations. mapping method - type conversion. Here is what I've come up to, using another class: Jul 25, 2019 · CreatePersonMapper INSTANCE = Mappers. Jan 8, 2024 · Let’s consider a case when we have an abstract class with a public non-abstract method: public abstract int abstractFunc() ; public String defaultImpl() {. It also allows us to declare method signatures Feb 25, 2018 · 5. class}) public interface PostMapper { // since the author attribute on postDTO is a String, we use mapstruct to find // within our database the matching user to that username and return the user object @Mapping(source public @interface Named. Interface vs. 1 使用するBean public class Person { private String name; private int age; // constructor/getter… Mar 4, 2020 · historyMapper; Also for fields with same name in target and source no need to use @Mapping, so in above case below mapper definition is enough to acheive desired result. Will be used to select the correct mapping methods when mapping a bean property type, element of an iterable type or the key/value of a map type. class) // nothing fancy in there. Change the interface to an abstract mapper class, then you can implement specific mapping to the given property. I'm using MapStruct, mapstruct-jdk8 version 1. See also #2257 and #2211 Nov 17, 2021 · That is correct. type conversion - mapping method. class ); answered Jan 30, 2023 at 19:04. The body is provided by the subclass (inherited May 18, 2020 · Since MapStuct don't know how to map a String to Role, you have to explicite define the mapping role. public abstract FarmMinimalDTO mapToFarmDTO(FarmDTO farmDTO); } If the farmDTO. We will discuss the benefits of using MapStruct, including its ability to generate code at compile-time, eliminating the overhead of runtime reflection. this. And if you are using Gradle, first make sure you have version 8. Can be used to qualify a single method or all methods of a given type by specifying this annotation on the type level. Points to Remember. In this tutorial, we’ll specifically learn how to use the Mapstruct mappers with Java bean classes which are inherited. In case this guide doesn’t answer all your questions just join the MapStruct GitHub Discussions to get help. 1. 12 AssertJ : 3. Aug 5, 2019 · 13. Mar 9, 2021 · You need to have a MapperConfig that will carry all the common configurations. IGNORE) public abstract class AggregatorMapper {. Asking for help, clarification, or responding to other answers. 14. We will also examine how MapStruct helps Using an abstract class it worked well as demanded but using a @Context variable the default method gets not invoked. getMapper(AMapper. Aug 22, 2016 · I have two classes one is my actual PurchaseOrder class, which is known as my target class, and the other is EDPurchaseOrder class which is known as the source file, Don't worry about the naming conventions I used, go with source and target files. IGNORE) @Primary. class, Answers. List is an abstract class or interface. It can have abstract and non-abstract methods. Feb 11, 2019 · Direct (types source -target are the same) Mapping method (built-in) Type conversion. If you have something which is a singleton, like a service you want to use, then maybe injecting it in your mapper is the Nov 15, 2023 · AnimalDTO mainAnimal; } If now in Mapstruct i would write something like: @Mapper(config = MapperConfiguration. Nov 30, 2015 · Object input; Which, in runtime, returns a custom object named TicketDetails. *; import spring. When you are using Lombok builder and mapstruct together. Feb 21, 2022 · @Mapper(componentModel = "spring", unmappedTargetPolicy = ReportingPolicy. Apr 27, 2023 · In this comprehensive guide, we will explore the capabilities of MapStruct and how it can be used to maximize the efficiency and clarity of Java code. getToExpression in class SimpleConversion Parameters: conversionContext - A context providing optional information required for creating the conversion. The only restriction is that every class in the hierarchy must have the @SuperBuilder annotation. I can prove it. 2 (and above) using the new (experimental) annotation @SuperBuilder. 2. This modal extends a base modal May 8, 2015 · 6. rql. Final we have dependency injection via constructor. simply @BeanMapping let you customize the mapping process. NO("no"); String code; TestEnum(String code) {. You can also achieve providing the qualifiedByName method a reference to the enumDefinitionDao by auto-wiring the DAO in an abstract class via setter injection, as demonstrated below. As you have noticed in order JPA to perform the save correctly you need to set the link to the config in the ConfigHeader. Marks mapping methods with the given qualifier name. DeviceService deviceService; public static DeviceDataMapper INSTANCE = Mappers. It generates mappers using only provided interfaces. example 1: @BeanMapping (ignoreByDefault = true) means No automatic mapping will take place, so All mappings have to be defined manually. Sep 26, 2023 · What is Abstract Class in Java? Java abstract class is a class that can not be initiated by itself, it needs to be subclassed by another class to use its properties. First, create a Spring Boot project using your preferred . I would like to do mapping of nested object that needs value from the parent object. Abstract Class. Provide a non abstract / non interface result type or a factory method. Jul 11, 2018 · Target class: class Parameters { private String group; private String name; private String value; // getters and setters omitted } Is it possible using MapStruct to convert a ReportSettings object to List<Parameters> object like below where the field names from the ReportSettings class are mapped to the Parameter class's group field: Dec 29, 2021 · Thanks for contributing an answer to Stack Overflow! Please be sure to answer the question. Few examples as reference points: import org. class}, injectionStrategy = InjectionStrategy. getMapper( MyMapper. The problem is the nested mapper is always null in my unit tests (works well in the application) this is my mapper declaration : @Mapper(componentModel = "spring", uses = MappingUtils. return delegate. Jun 4, 2021 · At present MapStruct supports CDI (Contexts and Dependency Injection for JavaTM EE), JSR330 (Dependency Injection for Java) and the Spring Framework. Here is the code of the generated method : @Override. Feb 21, 2020 · @MarcusVoltolim My point was that qualifiedBy or qualifiedByName are not needed in this specific example because there are no other properties that receives the source and returns the String (with the unlikely edge case that Source contains a property of type Source that maps to String). example: val Sep 2, 2023 · I have a Spring boot application where auto component scan is enabled and mapstruct seems to be set up correctly, since it works on basic mappings created on interfaces, but I can't seem to add a custom decorator to it. @Mapper(. missionSetToTreeDtoSet( set ); This is the reference documentation of MapStruct, an annotation processor for generating type-safe, performant and dependency-free bean mapping code. It really depends what you need to do. In addition, the component = "spring" is instructing mapstruct to make both of these mappers autowired in their counterpart class thus resulting in the dependency issue that doesn't exist in the example. @Mapping(target ="field", expression = "java(customMethod(obj))") Mar 9, 2020 · Media is an abstract class which is implemented by a class Image and a class Video. java. public class OrderMappingContext {. Add Lombok to the equation, and you end up with almost pure data classes and very little boilerplate code. CONSTRUCTOR) 2)You could do it this way: @Mapper(componentModel = "spring") @RequiredArgsConstructor //lombok annotation, which authowire your field via constructor. Let’s add the mapstruct library into our Maven pom. Mar 2, 2018 · So that when MapStruct sees during the mapping that when mySource. componentModel = "spring", injectionStrategy = InjectionStrategy. Method with @AfterMapping will be executed at the end of map method and it should have same input parameter as map method for example in below sample. We can define it as an abstract class that allows us to only implement those methods of the mapper interface which we want to customize. ) public interface ParentConfig {. Feb 22, 2024 · More specifically in the @Mapper annotatation, the "uses" parameter includes the opposing mapper class. The normal Mapper doesn´t work: @Mapping(target = 'somethingToIgnore', ignore = 'true') Person toPerson(PersonDTO source); @InheritInverseConfiguration. @Mapper. first make sure annotations processors already enabled in your IDE and lombok-mapstruct-binding dependency already present in you project. Source Classes: Source class EDCustomerOrder and its reference classes: Oct 16, 2021 · Step 3: Mapper class should have be annotated with @Mapper annotation @Mapper(componentModel = "spring") @Service public interface PersonMapper { // add appropriate mapper methods } Step 3: Update maven project & run. Dec 5, 2017 · mapstruct-processor は Annotation Processor の処理が含まれています。実装時に参照するクラス群は mapstruct-jdk8 に含まれています。 mapstruct はまだ完全に枯れているようには見えないライブラリなのでバージョンごとに振る舞いの差があります。 May 11, 2024 · By using a custom mapper with MapStruct, we can customize the default mapping methods. You need to change the interface to an abstract class and move PersonInfoSearchService call to @Named method: @Mapper (componentModel = "spring") public abstract class DemoConvert { @Autowired private PersonInfoSearchService personInfoSearchService; @Mapping (source = "name Aug 31, 2017 · MapStruct: trouble with abstract class. 0. But in my case I work with immutable objects. Jun 23, 2020 · You need to set the subclassExhaustiveStrategy property in your @Mapper annotation to RUNTIME_EXCEPTION. For this you need to add in your Config something like: 1. For, better understanding, I'm writing the normal java code example below. The abstract keyword is a non-access modifier, used for classes and methods: Abstract class: is a restricted class that cannot be used to create objects (to access it, it must be inherited from another class). I understand that being an abstract class it should indicate which of the implementations to use, but I don't May 26, 2022 · I have recently started using Mapstruct as part of my work and finding this really useful. @Mapper(injectionStrategy = InjectionStrategy. There are 2 ways you can achieve this: First option: You can use CollectionMappingStrategy#ADDER_PREFERRED (see more here ). Çağatay Sel. Overview. Hope the above example helps in getting it compiling for you. If you have something which is dynamic, based on some request parameters then you'll need to use @Context. Mar 13, 2021 · With MapStruct, I created a mapper that is an abstract class. mock(My. public interface CategoryMapper {. g. getMapper(CreatePersonMapper. mappingInheritanceStrategy = MappingInheritanceStrategy. You can achieve that by providing 2 new methods in your mapper. These are methods which need to be implemented by the class extending the abstract class. Inside target folder there will be PersonMapperImpl. class); will look for the generated implementation of the mapper interface. I am having an issue when I use mapstruct in an abstract class which extends an parent class. Have a look at GitHub repository to see how simple a Spring Boot Jun 8, 2022 · MapStruct allows to define a Decorator class and annotate it with @DecoratedWith annotation. To be more precisely, I even want something more elaborated: The target should be a class haven three properties in which the resulting target value must be split into. An abstract class must be declared with an abstract keyword. Jan 30, 2018 · public abstract class AbstractItem { private String upc; private String quantity; //getter and setter for upc and quantity } public class OrderedItem extends AbstractItem { private String orderId; // getter and setter for orderId } Then I have a modal which I want to convert from OrderedItem. CONSTRUCTOR, componentModel = "spring", uses = {TransactionMapper. class); Dec 16, 2022 · uses clause in @Mapper annotation allow your mapper to use the mappers you defined if they are required. It cannot be instantiated. Final and defining abstract class that I inject via Spring. And also you need to enable the Maven annotation processing by following steps in eclipse : Step1 :- Right click on the project. @Autowired. getMapper (SubClassMapper. I'm looking at how to be able to test them via Junit Test ? Mar 7, 2019 · 21. Abstract class in Java. CALLS_REAL_METHODS), then mock any abstract methods that are invoked. example 2: @BeanMapping (ignoreUnmappedSourceProperties = {"title"}) means ignore title field during the mapping process. I want to test a method that contains a mapping with mapStruct. AMapperINSTANCE = Mappers. @Mapper ( componentModel = "spring", unmappedTargetPolicy = org. 3. I can add the objectFactory for Axis class but how can I map all 3 different concrete classes by single objectFactory. So it needs to know which types to construct in order to generate a method implementation. uy bu ki ol qc ab am zk bs nk