NullPointerException when trying to define a custom PropertyMap

Question

I\'m using ModelMapper the following way :

I have a few converter classes that are Spring components and they register custom ModelMapper mappings

@C         


        

Answer 1

For anyone coming across with the same issue: My problem was that I used PropertyMap with anonymous implementation like the documentation suggested within a spring configuration. This messed up within the ExplicitMappingBuilder. What I have now is the following:

@Configuration
public class ApplicationConfig {

    @Bean
    public ModelMapper modelMapper() {
        ModelMapper modelMapper = new ModelMapper();
        modelMapper.addMappings(new UserPropertyMap());
        return modelMapper;
    }
}

My UserPropertyMap looks like this:

public class UserPropertyMap extends PropertyMap {
    @Override
    protected void configure() {
        map().setUserName(source.getUsername());
    }
}

This worked like a charm in Spring Boot 2.