Question

使用支持多态的Jackson和Hibernate，我想找到一个很好的Java映射库，它可以帮助我分离我的不同层（主要是DTO / Entities），并且还支持多态性。

Orika似乎支持多态（但不是没有类型的声明）。 https://orika-mapper.github.io/orika-docs/

我没有为其他两个竞争者Selma和MapStruct找到好的例子。 http://www.selma-java.org/ http://mapstruct.org/

有没有人有这些图书馆的经验？

更新1：其中一个测试案例。

public class PolymorphicMapperTest {

public abstract class Animal{

    private String fooAnimal;

    public Animal(String fooAnimal) {
        this.fooAnimal = fooAnimal;
    }

    public String getFooAnimal() {
        return fooAnimal;
    }
}

public  class Cat extends Animal {

    private String fooCat;

    public Cat(String fooAnimal, String fooCat) {
        super(fooAnimal);
        this.fooCat = fooCat;
    }
}

public  class Snake extends Animal {

    private String fooSnake;

    public Snake(String fooAnimal, String fooSnake) {
        super(fooAnimal);
        this.fooSnake = fooSnake;
    }

    public String getFooSnake() {
        return fooSnake;
    }
}


public abstract class AnimalDTO{
    public String fooAnimal;
}

public  class CatDTO extends AnimalDTO {
    public String fooCat;
}

public  class SnakeDTO extends AnimalDTO {
    public String fooSnake;
}


@Test
public void testMapping() {

        Mapper mapper = MyAwesomeMapper();
        mapper.declare(Animal.class,AnimalDTO.class);

        SnakeDTO snakeDTO = new SnakeDTO();
        snakeDTO.fooAnimal = "Snake";
        snakeDTO.fooSnake = "Anaconda";

        //I don't want the mapper to know the input Type because Jackson will hide it to me.
        AnimalDTO animalDTOToMap = (AnimalDTO) snakeDTO; 


        Animal animal1 = mapper.map(animalDTOToMap);
        Assert.isTrue(animal1 instanceof Snake);
        //And when casted we want to find Animal and Snake fields mapped


        CatDTO catDTO = new CatDTO();
        catDTO.fooAnimal = "Cat";
        catDTO.fooCat = "Persan";

        AnimalDTO secondAnimalDTOToMap = (AnimalDTO) catDTO;

        Animal animal2 = mapper.map(secondAnimalDTOToMap);
        Assert.isTrue(animal2 instanceof Cat);
        //And when casted we want to find Animal and Cat fields mapped


}

}

Answer 1

该票证在MapStruct积压订单中处于打开状态 https://github.com/mapstruct/mapstruct/issues/131

也提供一些手工编码的解决方案：https://github.com/au-research/ANDS-Vocabs-Toolkit/commit/087c32e89a4d515e61e4d4fe0b093f277d407315#diff-28ded5bdcc0bbe659e4da1ae67530d37R104

Java Type-Refinement映射

1 个答案: