BAEL-6216 Use Mapper in Another Mapper with Mapstruct and Java (#13802)

mapstruct/src/main/java/com/baeldung/dto/ArticleDTO.java

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+package com.baeldung.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class ArticleDTO {
+    private int id;
+    private String name;
+    private PersonDTO author;
+}

mapstruct/src/main/java/com/baeldung/entity/Article.java

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+package com.baeldung.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class Article {
+    private int id;
+    private String name;
+    private Person author;
+}

mapstruct/src/main/java/com/baeldung/mapper/ArticleMapper.java

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+package com.baeldung.mapper;
+
+import com.baeldung.dto.ArticleDTO;
+import com.baeldung.dto.PersonDTO;
+import com.baeldung.entity.Article;
+import com.baeldung.entity.Person;
+import org.mapstruct.Mapper;
+import org.mapstruct.factory.Mappers;
+
+@Mapper
+public interface ArticleMapper {
+    
+    ArticleMapper INSTANCE = Mappers.getMapper(ArticleMapper.class);
+    
+    ArticleDTO articleToArticleDto(Article article);
+
+    default PersonDTO personToPersonDto(Person person) {
+        return Mappers.getMapper(PersonMapper.class).personToPersonDTO(person);
+    }
+}

mapstruct/src/main/java/com/baeldung/mapper/ArticleUsingPersonMapper.java

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+package com.baeldung.mapper;
+
+import com.baeldung.dto.ArticleDTO;
+import com.baeldung.dto.PersonDTO;
+import com.baeldung.entity.Article;
+import com.baeldung.entity.Person;
+import org.mapstruct.Mapper;
+import org.mapstruct.factory.Mappers;
+
+@Mapper(uses = PersonMapper.class)
+public interface ArticleUsingPersonMapper {
+
+    ArticleUsingPersonMapper INSTANCE = Mappers.getMapper(ArticleUsingPersonMapper.class);
+
+    ArticleDTO articleToArticleDto(Article article);
+}