CODEWITHSUNDEEP
javamodelmapper
Florent06
Florent06

Reputation: 988

Configure ModelMapper to map nested object to field

Here are my DTOs:

public class TagVolumeDTO {
    private Long id;
    private Long idTag;
    //...
}

public class TagTDO {
    private Long id;
    private Long amount;
    //...
}

and here are my entities:

public class TagVolume {
    private Long id;
    private Tag tag;
    //...
}

public class Tag {
    private Long id;
    private Long amount;
    //...
}

I would like to configure my ModelMapper to map Tag#id to TagVolumeDTO#idTag. Is that possible?

Upvotes: 1

Views: 13559

Answers (2)

Andrew Nepogoda
Andrew Nepogoda

Reputation: 1895

Configuration:

ModelMapper mapper = new ModelMapper();
mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
mapper.typeMap(TagVolume.class, TagVolumeDTO.class)
        .addMappings(m -> m.map(src -> src.getTag().getId(), TagVolumeDTO::setIdTag));

Usage:

Tag tag = new Tag();
tag.setId(1L);
tag.setAmount(10L);
TagVolume tagVolume = new TagVolume();
tagVolume.setId(123L);
tagVolume.setTag(tag);
System.out.println(mapper.map(tagVolume.getTag(), TagDTO.class));
System.out.println(mapper.map(tagVolume, TagVolumeDTO.class));

Output:

TagDTO(id=1, amount=10)

TagVolumeDTO(id=123, idTag=1)

ModelMapper version: 1.1.0

P.s. You can to organize your code similar to my answer in another question.

Upvotes: 5

Mahendra Kapadne
Mahendra Kapadne

Reputation: 426

For these kind of mapping it is preferred to used AnnotationProcessor like mapStuct which reduces code.

It will generate code for Mapper

  @Mapper
public interface SimpleSourceDestinationMapper {
    TagVolumeDTO sourceToDestination(Tag source);
    Tag destinationToSource(TagVolumeDTO destination);
}

usage of these mapper is as follow

private SimpleSourceDestinationMapper mapper
      = Mappers.getMapper(SimpleSourceDestinationMapper.class);

TagVolumeDTO destination = mapper.sourceToDestination(tag);

Kindly find link for detailed implementation MapStuct

Upvotes: 2

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