Exception when adding a custom mapping

[Sascha Ißbrücker]

Hi,

I was just playing with ModelMapper and it looks pretty cool so far. Good job!

However when I try to add a custom mapping to the mapper it throws an exception.

Custom mapping:

        PropertyMap<User, DUser> userMap = new PropertyMap<User, DUser>() {

            @Override

            protected void configure() {

                map().roleCount = source.getRoles().size();

            }

        };

Configuring the mapping throws exception:

        modelMapper.addMappings(userMap);

Exception:

Exception in thread "main" org.modelmapper.ConfigurationException: ModelMapper configuration errors:

1) A mapping is missing a required destination method.

1 error

at org.modelmapper.internal.Errors.throwConfigurationExceptionIfErrorsExist(Errors.java:226)

at org.modelmapper.internal.MappingBuilderImpl.build(MappingBuilderImpl.java:137)

at org.modelmapper.internal.TypeMapImpl.addMappings(TypeMapImpl.java:71)

at org.modelmapper.internal.TypeMapStore.getOrCreate(TypeMapStore.java:93)

at org.modelmapper.ModelMapper.addMappings(ModelMapper.java:92)

at Main.initializeModelMapper(Main.java:169)

at Main.main(Main.java:25)

So, not sure if I'm doing something wrong? The only thing I can think of is that field matching is enabled (enableFieldMatching(true))? 

I have pushed my code a (temporary) GitHub repo, if you want to take a look at it: https://github.com/sissbruecker/model-mapper-propertymap-error

Thanks,

Sascha

[Jonathan Halterman]

Hey Sascha,

Unfortunately there's no (easy) way to do field mapping like you were going for, so the mapping of two properties has to be done via getter/setter method pairs such as:

map().setRoleCount(source.getRoles().size());

Try something like that.

Cheers,

Jonathan

[Sascha Ißbrücker]

Ok, there's no real reason for not generating these getters/setters anyway.

Thanks!

[kathire...@gmail.com]

Hi,

I'm getting the same exception but the problem is not resolved after the suggestion. solution.

Any idea?

Thanks.