@Autowired
private ModelMapper modelMapper;

public Destination sample(Source source) {
    return modelMapper.map(source, Destination.class);
}

@Bean
TypeMapConfigurer<Source, Destination> typeMap() {
    return new TypeMapConfigurer<Source, Destination>() {
        @Override
        public void configure(TypeMap<Source, Destination> typeMap) {
            typeMap.addMapping(Source::getName, Destination::setUsername);
        }
    };
}

@Bean
Converter<String, String> converter() {
    return new Converter<String, String>() {
        @Override
        public String convert(MappingContext<String, String> context) {
            return context.getSource() == null ? null : context.getSource().toUppercase();
        }
    };
}

@Bean
Provider<Object> provider() {
    return request -> {
        Object source = request.getSource();
        return source != null && request.getRequestedType().isAssignableFrom(source.getClass()) ? source : null;
    };
}

@Bean
Condition<String, String> condition() {
    return context -> !StringUtils.isEmpty(context.getSource());
}

@Bean
Module module() {
    return modelMapper -> /* cutomize */;
}