Java, Map same object to different objects

Question

I have a list of Car's, I want to map them to different specific Car's like - FordCar, HondaCar, VolkswagenCar... base on value of maker attribute of Car, that is Car.maker

Can Dozer, MapStruct do this? Or is there any framework in Java which can do this?

Why Dozer? There is a standard Java type `Map`, see https://docs.oracle.com/javase/tutorial/collections/interfaces/map.html — Honza Zidek, Jul 01 '18 at 09:24
@ToanLu thanks for your quick response, but here my problem is little different, for example say - I have a list of `Car`s, I want to map them to `FordCar`, `HondaCar`, `VolkswagenCar`... base on value of `maker` attribute of `Car`, that is `Car.maker` — CR Sardar, Jul 01 '18 at 09:40
@ToanLu: Yor example in the original question shows completely different case. Adjust your example to get better answers. — mentallurg, Jul 01 '18 at 09:52
the person who is giving -1 to the question, please be informed, i have done my home works, i have read entire documents of MapStruct, but still can not find anything helpful — CR Sardar, Jul 03 '18 at 12:10

score 0 · Answer 1 · answered Jul 01 '18 at 10:46

If you don't have any extra requirement, you could do this simply using Java-8.

Map<String, Supplier<Car>> creators = new HashMap(){{
  put("honda", ()-> new HondaCar());
  put("ford", ()-> new FordCar());
}}

listOfCars.map(Car::getMaker).map(maker -> creators.get(maker).get())

score 0 · Answer 2 · answered Aug 01 '18 at 06:42

0

After long finding, conclusion - as of now MapStruct does not support it. That is mapping of Map<> entries. I did a round about - map a Map<> to a Map<> and flatten it using JackSon property @JsonAnyGetter and @JsonAnySetter

answered Aug 01 '18 at 06:42

CR Sardar

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score -1 · Answer 3 · answered Jul 01 '18 at 09:50

-1

Orika, remap, Selma, MapStruct.

To get your specific mapping, implement it in the mapper.

answered Jul 01 '18 at 09:50

mentallurg

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I have red example of those frameworks, but they are talking about `1-to-1` mapping, not `1-to-many` mapping, can you please read once my modified explanations – CR Sardar Jul 01 '18 at 10:02

Java, Map same object to different objects

3 Answers3