我有一个要映射到A
的对象B
。现在,此A
具有一个名为field1
的枚举,其中包含一些值。我想使用@ValueMappings
将它们映射到B
中的其他枚举值。到目前为止,以下是我的代码:
@Mapping(source = "field1", target = "field1", nullValuePropertyMappingStrategy = IGNORE)
@Mapping(source = "field2", target = "field2", nullValuePropertyMappingStrategy = IGNORE)
@ValueMappings({
@ValueMapping(source = "field1.some1", target = "diff1"),
@ValueMapping(source = "field1.some2", target = "diff1"),
@ValueMapping(source = "field1.some3", target = "diff1"),
@ValueMapping(source = "field1.some4", target = "diff2"),
})
B map(A a);
当我尝试编译它时,出现错误:
error: The following constants from the property "A.field1 field1" enum have no corresponding constant in the "B field1" enum and must be be mapped via adding additional mappings: diff1, diff2.
解决此问题的一种方法是执行以下操作:
@Mapper(componentModel = "spring", uses = {SomeUtil.class}, unmappedTargetPolicy = ReportingPolicy.IGNORE)
public interface Mapper {
@Mapping(source = "field1", target = "field1", nullValuePropertyMappingStrategy = IGNORE)
@Mapping(source = "field2", target = "field2", nullValuePropertyMappingStrategy = IGNORE)
B map(A a);
}
并且在SomeUtil.class中:
@Mapper(componentModel = "spring")
public interface SomeUtil {
@ValueMappings({
@ValueMapping(source = "field1.some1", target = "diff1"),
@ValueMapping(source = "field1.some2", target = "diff1"),
@ValueMapping(source = "field1.some3", target = "diff1"),
@ValueMapping(source = "field1.some4", target = "diff2"),
})
b.field1 map(a.field1 field);
}