英文:
Use @Mapping with expression to parse OffsetDateTime
问题
I am trying to write a Mapper between my internal Entity class and my DTO class using org.mapstruct.Mapper. The Entity class contains a field startDate of type String that is mapped to a field startDate of type OffsetDateTime.
To map those fields I am using @Mapping with an expression like this:
@Mapper(componentModel = "spring",collectionMappingStrategy = CollectionMappingStrategy.TARGET_IMMUTABLE)public interface InstanceMapper {@Mapping(target = "startDate", expression = "java(OffsetDateTime.parse(source.getStartDate()))")InstanceDTO toInstanceDTO(Instance source);@Mapping(target = "startDate", expression = "java(source.getStartDate().toString())")Instance toInstance(InstanceDTO source);}
The second @Mapping compiles correctly but at compilation I get the following error because of the @Mapping(target = "startDate", expression = "java(OffsetDateTime.parse(source.getStartDate()))"):
[ERROR] project/target/generated-sources/annotations/path/service/mappers/InstanceMapperImpl.java error: cannot find symbol[ERROR] symbol: variable OffsetDateTime[ERROR] location: class InstanceMapperImpl
Adding an unused import to the InstanceMapper.java file does not solve the error, as it seems to be removed at compilation.
英文:
I am trying to write a Mapper between my internal Entity class and my DTO class using org.mapstruct.Mapper. The Entity class contains a field startDate of type String that is mapped to a field startDate of type OffsetDateTime.
To map those fields I am using @Mapping with an expression like this:
@Mapper(componentModel = "spring",collectionMappingStrategy = CollectionMappingStrategy.TARGET_IMMUTABLE)public interface InstanceMapper {@Mapping(target = "startDate", expression = "java(OffsetDateTime.parse(source.getStartDate()))")InstanceDTO toInstanceDTO(Instance source);@Mapping(target = "startDate", expression = "java(source.getStartDate().toString())")Instance toInstance(InstanceDTO source);}
The second @Mapping compiles correctly but at compilation I get the following error because of the @Mapping(target = "startDate", expression = "java(OffsetDateTime.parse(source.getStartDate()))"):
[ERROR] project/target/generated-sources/annotations/path/service/mappers/InstanceMapperImpl.java error: cannot find symbol[ERROR] symbol: variable OffsetDateTime[ERROR] location: class InstanceMapperImpl
Adding an unused import to the InstanceMapper.java file does not solve the error, as it seems to be removed at compilation.
答案1
得分: 1
由于错误基本上是一个缺少导入的问题，我相当确定您可以通过在表达式中使用完全限定的名称（即java.time.OffsetDateTime）来解决这个问题：
@Mapper(componentModel = "spring",collectionMappingStrategy = CollectionMappingStrategy.TARGET_IMMUTABLE)public interface InstanceMapper {@Mapping(target = "startDate", expression = "java(java.time.OffsetDateTime.parse(source.getStartDate()))")InstanceDTO toInstanceDTO(Instance source);@Mapping(target = "startDate", expression = "java(source.getStartDate().toString())")Instance toInstance(InstanceDTO source);}
英文:
Seeing as the error is basically a missing import, I'm reasonably sure you can solve this by using a fully qualified name (i.e. java.time.OffsetDateTime) in your expression:
@Mapper(componentModel = "spring",collectionMappingStrategy = CollectionMappingStrategy.TARGET_IMMUTABLE)public interface InstanceMapper {@Mapping(target = "startDate", expression = "java(java.time.OffsetDateTime.parse(source.getStartDate()))")InstanceDTO toInstanceDTO(Instance source);@Mapping(target = "startDate", expression = "java(source.getStartDate().toString())")Instance toInstance(InstanceDTO source);}
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