无法用spring componentModel为修饰的MapStruct映射器创建bean

Question

我目前正在用Spring componentModel设置一个MapStruct映射器，到目前为止一切都很好，各个子映射器可以按照预期进行自动注入。但是，在加载ApplicationContext时，使用修饰映射器会导致以下失败：

创建名为“Example MapperImpl”的bean时出错：通过构造函数参数0表示不满足的依赖关系；嵌套异常是org.springframework.beans.factory.NosuchBeanDefinitionException：没有类型为“...ExampleMapper”的合格bean可用：至少需要1个符合autowire候选的bean。依赖项注释：{@org.springframework.beans.factory.annotation.qualifier(value=“delegate”）}

@Mapper(componentModel = "spring",
        uses = GenericMapper.class,
        injectionStrategy = InjectionStrategy.CONSTRUCTOR)
@DecoratedWith(ExampleMapperDecorator.class)
public interface ExampleMapper {

    ...

}


public abstract class ExampleMapperDecorator implements ExampleMapper {

    @Autowired
    @Qualifier("delegate")
    private ExampleMapper delegate;

    ...

}

@SpringBootTest(classes = {
        ExampleMapperImpl.class,
        GenericMapperImpl.class
})
class ExampleMapperTest {

    @Autowired
    private ExampleMapper underTest;

    ...

}

@Generated(
    value = "org.mapstruct.ap.MappingProcessor",
    date = "2021-05-26T15:44:17+0200",
    comments = "version: 1.4.2.Final, compiler: javac, environment: Java 13.0.2 (Oracle Corporation)"
)
@Component
@Primary
public class ExampleMapperImpl extends ExampleMapperDecorator implements OrderingMapper {

    private final ExampleMapper delegate;

    @Autowired
    public ExampleMapperImpl(@Qualifier("delegate") ExampleMapper delegate) {

        this.delegate = delegate;
    }

    ...
}

Answer 1

我终于设法解决了这个问题。对于修饰映射器，除了ExampleMapperImpl之外，还会生成一个额外的类ExampleMapperImpl_，该类也必须包含在SpringBootTest注释中。

@SpringBootTest(classes = {
        ExampleMapperImpl.class,
        ExampleMapperImpl_.class,
        GenericMapperImpl.class
})