Mapstruct uses not working, how to make mapstruct "uses" use other mapper for inner fields

huangapple
go评论108阅读模式
英文:

Mapstruct uses not working, how to make mapstruct "uses" use other mapper for inner fields

问题

Mapstruct的"uses"选项不起作用，它将所有实体映射到一个映射器中，而不是为不同的实体使用不同的映射器。我有一个pom文件如下所示：

  1. <plugin>
  2.     <groupId>org.apache.maven.plugins</groupId>
  3.     <artifactId>maven-compiler-plugin</artifactId>
  4.     <version>${compiler.version}</version>
  5.     <configuration>
  6.         <source>17</source>
  7.         <target>17</target>
  8.         <annotationProcessorPaths>
  9.             <path>
  10.                 <groupId>org.projectlombok</groupId>
  11.                 <artifactId>lombok</artifactId>
  12.                 <version>${lombok.version}</version>
  13.             </path>
  14.             <path>
  15.                 <groupId>org.mapstruct</groupId>
  16.                 <artifactId>mapstruct-processor</artifactId>
  17.                 <version>${mapstruct.version}</version>
  18.             </path>
  19.             <path>
  20.                 <groupId>org.projectlombok</groupId>
  21.                 <artifactId>lombok-mapstruct-binding</artifactId>
  22.                 <version>0.2.0</version>
  23.             </path>
  24.         </annotationProcessorPaths>
  25.     </configuration>
  26. </plugin>

RoomMapper接口如下：

  1. @Mapper(uses = {ParticipantMapper.class})
  2. public interface RoomMapper {
  4.     RoomMapper INSTANCE = Mappers.getMapper(RoomMapper.class);
  6.     @Mapping(target = "participant", source = "participant")
  7.     RoomFullDto entityToData(RoomEntity entity);
  9.     @Mapping(target = "participant", source = "participant")
  10.     RoomEntity dataToEntity(RoomFullDto entity);
  12.     @Named("EntityToShortData")
  13.     RoomShortDto entityToShortData(RoomEntity entity);
  15.     @Named("DataToEntity")
  16.     RoomEntity shortDataToEntity(RoomShortDto entity);
  17. }

ParticipantMapper接口如下：

  1. @Mapper
  2. public interface ParticipantMapper {
  4.     ParticipantMapper INSTANCE = Mappers.getMapper(ParticipantMapper.class);
  6.     @Named("DataToEntity")
  7.     @Mapping(target = "room.id", source = "roomId")
  8.     @Mapping(target = "user.id", source = "userId")
  9.     @Mapping(target = "nicknameInRoom", source = "username")
  10.     ParticipantEntity dtoToEntity(ParticipantDto participantDto);
  12.     @Named("EntityToData")
  13.     @Mapping(target = "roomId", source = "room.id")
  14.     @Mapping(target = "userId", source = "user.id")
  15.     @Mapping(target = "username", source = "nicknameInRoom")
  16.     ParticipantDto entityToDto(ParticipantEntity participantDto);
  17. }

在RoomMapperImpl中，Mapstruct生成的映射器未使用ParticipantMapper，因此您无法配置如何映射字段，并且忽略了某些字段。解决这个问题，您可以尝试以下几点：

  1. 确保在RoomMapper接口上使用了@Mapper(uses = {ParticipantMapper.class})。

  2. 确保RoomMapperImpl类已由Mapstruct生成。您可以检查生成的源代码，看看是否有RoomMapperImpl类。

  3. 确保您的IDE或构建工具已正确配置，以确保Mapstruct的注解处理器已启用。

  4. 尝试清理和重新构建项目，以确保所有依赖项和生成的代码都处于最新状态。

如果您仍然遇到问题，可能需要检查您的依赖项版本和配置是否正确，并确保所有的注解都按照预期工作。如果问题仍然存在，请提供更多详细信息以获取更多帮助。

英文:

Mapstruct "uses" not working, it maps all entities in one mapper, instead of using different mappers for different entities
I have pom

  1. `&lt;plugin&gt;
  2.             &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
  3.             &lt;artifactId&gt;maven-compiler-plugin&lt;/artifactId&gt;
  4.             &lt;version&gt;${compiler.version}&lt;/version&gt;
  5.             &lt;configuration&gt;
  6.                 &lt;source&gt;17&lt;/source&gt;
  7.                 &lt;target&gt;17&lt;/target&gt;
  8.                 &lt;annotationProcessorPaths&gt;
  9.                     &lt;path&gt;
  10.                         &lt;groupId&gt;org.projectlombok&lt;/groupId&gt;
  11.                         &lt;artifactId&gt;lombok&lt;/artifactId&gt;
  12.                         &lt;version&gt;${lombok.version}&lt;/version&gt;
  13.                     &lt;/path&gt;
  14.                     &lt;path&gt;
  15.                         &lt;groupId&gt;org.mapstruct&lt;/groupId&gt;
  16.                         &lt;artifactId&gt;mapstruct-processor&lt;/artifactId&gt;
  17.                         &lt;version&gt;${mapstruct.version}&lt;/version&gt;
  18.                     &lt;/path&gt;
  19.                     &lt;path&gt;
  20.                         &lt;groupId&gt;org.projectlombok&lt;/groupId&gt;
  21.                         &lt;artifactId&gt;lombok-mapstruct-binding&lt;/artifactId&gt;
  22.                         &lt;version&gt;0.2.0&lt;/version&gt;
  23.                     &lt;/path&gt;
  24.                 &lt;/annotationProcessorPaths&gt;
  25.             &lt;/configuration&gt;
  26.         &lt;/plugin&gt;`
  1. @Mapper(uses = {ParticipantMapper.class})
  2. public interface RoomMapper {
  4.     RoomMapper INSTANCE = Mappers.getMapper(RoomMapper.class);
  6.     @Mapping(target = &quot;participant&quot;, source = &quot;participant&quot;)
  7.     RoomFullDto entityToData(RoomEntity entity);
  9.     @Mapping(target = &quot;participant&quot;, source = &quot;participant&quot;)
  10.     RoomEntity dataToEntity(RoomFullDto entity);
  12.     @Named(&quot;EntityToShortData&quot;)
  13.     RoomShortDto entityToShortData(RoomEntity entity);
  15.     @Named(&quot;DataToEntity&quot;)
  16.     RoomEntity shortDataToEntity(RoomShortDto entity);
  17. }

and

  1. @Mapper
  2. public interface ParticipantMapper {
  5.     ParticipantMapper INSTANCE = Mappers.getMapper(ParticipantMapper.class);
  7.     @Named(&quot;DataToEntity&quot;)
  8.     @Mapping(target = &quot;room.id&quot;, source = &quot;roomId&quot;)
  9.     @Mapping(target = &quot;user.id&quot;, source = &quot;userId&quot;)
  10.     @Mapping(target = &quot;nicknameInRoom&quot;, source = &quot;username&quot;)
  11.     ParticipantEntity dtoToEntity (ParticipantDto participantDto);
  13.     @Named(&quot;EntityToData&quot;)
  14.     @Mapping(target = &quot;roomId&quot;, source = &quot;room.id&quot;)
  15.     @Mapping(target = &quot;userId&quot;, source = &quot;user.id&quot;)
  16.     @Mapping(target = &quot;username&quot;, source = &quot;nicknameInRoom&quot;)
  17.     ParticipantDto entityToDto (ParticipantEntity participantDto);
  18. }

in RoomMapperImpl mapstruct generate without using ParticipantMapper, so i cant't configure how to map fields and it ignores some fields

  1. public RoomFullDto entityToData(RoomEntity entity) {
  2.         if ( entity == null ) {
  3.             return null;
  4.         }
  6.         RoomFullDto roomFullDto = new RoomFullDto();
  8.         roomFullDto.setParticipant( participantEntitySetToParticipantDtoList( entity.getParticipant() ) );
  9.         roomFullDto.setId( entity.getId() );
  10.         roomFullDto.setName( entity.getName() );
  12.         return roomFullDto;
  13.     }
  15. protected List&lt;ParticipantDto&gt; participantEntitySetToParticipantDtoList(Set&lt;ParticipantEntity&gt; set) {
  16.         if ( set == null ) {
  17.             return null;
  18.         }
  20.         List&lt;ParticipantDto&gt; list = new ArrayList&lt;ParticipantDto&gt;( set.size() );
  21.         for ( ParticipantEntity participantEntity : set ) {
  22.             list.add( participantEntityToParticipantDto( participantEntity ) );
  23.         }
  25.         return list;
  26.     }
  28. ParticipantDto participantEntityToParticipantDto(ParticipantEntity participantEntity) {
  29.         if ( participantEntity == null ) {
  30.             return null;
  31.         }
  33.         ParticipantDto participantDto = new ParticipantDto();
  35.         participantDto.setId( participantEntity.getId() );
  36.         participantDto.setIsBanned( participantEntity.getIsBanned() );
  37.         if ( participantEntity.getRole() != null ) {
  38.             participantDto.setRole( participantEntity.getRole().name() );
  39.         }
  41.         return participantDto;
  42.     }

I tried to configure different versions of dependencies and annotationProcessors, it dont works

答案1

得分: 0

以下是翻译好的部分：

  • RoomFullDto#participant 字段类型是 java.util.List&lt;ParticipantDto&gt;（而不是 ParticipantDto）
  • ParticipantEntity#participant 字段类型是 java.util.Set&lt;ParticipantEntity&gt;（而不是 ParticipantEntity）
  • 我们需要声明两个不同类型之间的映射过程：Set&lt;ParticipantEntity&gt; 和 List&lt;ParticipantDto&gt; 的转换
    1. Set&lt;ParticipantEntity&gt; 到 List&lt;ParticipantDto&gt; 的转换
    1. List&lt;ParticipantDto&gt; 到 Set&lt;ParticipantEntity&gt; 的转换
  • 请尝试在 ParticipantMapper.java 中添加两个额外的方法：
  • 创建一个名为 ParticipantMapper#mapToList 的新方法
  • @Mapper
  • public interface ParticipantMapper {
  • ParticipantMapper INSTANCE = Mappers.getMapper(ParticipantMapper.class);
  • @Named(&quot;DataToEntity&quot;)
  • @Mapping(target = &quot;room.id&quot;, source = &quot;roomId&quot;)
  • @Mapping(target = &quot;user.id&quot;, source = &quot;userId&quot;)
  • @Mapping(target = &quot;nicknameInRoom&quot;, source = &quot;username&quot;)
  • ParticipantEntity dtoToEntity (ParticipantDto participantDto);
  • @Named(&quot;EntityToData&quot;)
  • @Mapping(target = &quot;roomId&quot;, source = &quot;room.id&quot;)
  • @Mapping(target = &quot;userId&quot;, source = &quot;user.id&quot;)
  • @Mapping(target = &quot;username&quot;, source = &quot;nicknameInRoom&quot;)
  • ParticipantDto entityToDto (ParticipantEntity participantDto);
  • //+ 2 additional mapping methods without any annota
  • List&lt;ParticipantDto&gt; mapToDtoList(Set&lt;ParticipantEntity&gt; set);
  • Set&lt;ParticipantEntity&gt; mapToEntitySet(List&lt;ParticipantDto&gt; list);
  • MapStruct 文档：6. 映射集合
英文:

The RoomFullDto#participant field type is java.util.List&lt;ParticipantDto&gt; (not ParticipantDto)

The ParticipantEntity#participant field type is java.util.Set&lt;ParticipantEntity&gt; (not ParticipantEntity)

We need to declare the mapping process between two different types: Set&lt;ParticipantEntity&gt; and List&lt;ParticipantDto&gt;

  1. Set&lt;ParticipantEntity&gt; -> List&lt;ParticipantDto&gt; transformation
  2. List&lt;ParticipantDto&gt; -> Set&lt;ParticipantEntity&gt; transformation

Please try to add 2 more methods for ParticipantMapper.java:

Create a new method ParticipantMapper#mapToList:

  1. @Mapper
  2. public interface ParticipantMapper {
  3.   
  5.     ParticipantMapper INSTANCE = Mappers.getMapper(ParticipantMapper.class);
  7.     @Named(&quot;DataToEntity&quot;)
  8.     @Mapping(target = &quot;room.id&quot;, source = &quot;roomId&quot;)
  9.     @Mapping(target = &quot;user.id&quot;, source = &quot;userId&quot;)
  10.     @Mapping(target = &quot;nicknameInRoom&quot;, source = &quot;username&quot;)
  11.     ParticipantEntity dtoToEntity (ParticipantDto participantDto);
  13.     @Named(&quot;EntityToData&quot;)
  14.     @Mapping(target = &quot;roomId&quot;, source = &quot;room.id&quot;)
  15.     @Mapping(target = &quot;userId&quot;, source = &quot;user.id&quot;)
  16.     @Mapping(target = &quot;username&quot;, source = &quot;nicknameInRoom&quot;)
  17.     ParticipantDto entityToDto (ParticipantEntity participantDto);
  18.   
  20.     //+ 2 additional mapping methods without any annota
  21.     List&lt;ParticipantDto&gt; mapToDtoList(Set&lt;ParticipantEntity&gt; set);
  23.     Set&lt;ParticipantEntity&gt; mapToEntitySet(List&lt;ParticipantDto&gt; list);
  24. }

MapStruct Documentation: 6. Mapping collections

huangapple
  • 本文由 发表于 2023年7月23日 23:01:01
  • 转载请务必保留本文链接：https://go.coder-hub.com/76748919.html
  • annotation-processing
  • java
  • mapper
  • mapstruct
  • maven
匿名

发表评论

匿名网友

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen:

确定