Dozer enum to enum mapping

Question

Why doesn't this work with Dozer? What would I have to do to make it happen? We have a gazillion enums, and sometimes we just need to map between them. Any way we could just configure dozer to do this without writing custom stuff?

enum EnumOne{ TEST1, TEST2 }
enum EnumTwo{ TEST1, TEST2 }

Mapper dozerMapper;

dozerMapper.map(EnumOne.TEST1, EnumTwo.class);

Did you solve it? if so, can you provide your solution? I'm running into the same problem. Enums are mapped fine when they are mapped as part of a larger POJO, but if I just want to map the Enum alone it doesn't work. — black666, Jan 22 '14 at 16:16
No, ended up writing a custom mapper for enums. Our mappers have a dozer mapper internally, and now they derive from a base class that can map enums by name. — tuxbear, Jan 23 '14 at 18:18

Ray · Answer 1 · 2017-05-04T23:36:23.627

It doesn't work because Dozer relies on the existence of a public constructor, which is illegal for an enum. You can infer this from the exception when you try to map them:

Exception in thread "main" org.dozer.MappingException: 
java.lang.NoSuchMethodException: DestinationEnum.< init >()

It's looking for a constructor that doesn't exist.

There's no way around it except as black666 said, it has be part of a bigger POJO. That's the way it's been shown in the documentation.

Dozer enum to enum mapping

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