我的映射器的映射器装饰器没有被编译,映射器正在被编译,但装饰器没有被编译。因为在构建期间,即使在映射器装饰器中执行此操作,也遇到类型转换错误。还有什么要补充的吗?
映射器代码:
@Mapper
@DecoratedWith(OneMapperDecorator.class)
public interface OneMapper {
public TwoObject convertToTwoObject(OneObject one);
}
装饰代码:
public abstract class OneMapperDecorator implements OneMapper {
private final OneMapper delegate;
public OneMapperDecorator (OneMapper delegate) {
this.delegate = delegate;
}
@Override
public TwoObject convertToTwoObject(OneObject one)
{
TwoObject two=delegate.convertToTwoObject(one);
two.setTotalFare(new BigDecimal(one.getPrice()));//string to bigdecimal conversion
return two;
}
}
答案 0 :(得分:2)
装饰器旨在增加映射而不是替换它。 MapStruct无法知道您正在装饰器中映射totalFare
。您有2个选择:
在您的OneMapper
中,您可以添加将执行映射的默认方法(如错误所述。
@Mapper
@DecoratedWith(OneMapperDecorator.class)
public interface OneMapper {
@Mapping(target = "totalFare", source = "price");
TwoObject convertToTwoObject(OneObject one);
default BigDecimal map(String value) {
return value == null ? null : new BigDecimal(value);
}
}
如果要在装饰器中进行映射,则需要告诉MapStruct不对其进行映射。
@Mapper
@DecoratedWith(OneMapperDecorator.class)
public interface OneMapper {
@Mapping(target = "totalFare", ignore = true);
TwoObject convertToTwoObject(OneObject one);
}
我建议我,如果您仅使用委托来映射额外的字段,我要么添加自定义方法,要么使用@AfterMapping
和@BeforeMapping
来处理。