tags from list to set

Author: tonylook

core/src/main/java/com/qa/blog/core/domain/Post.java

@@ -3,11 +3,12 @@
 import com.qa.blog.core.exception.BlogErrorCode;
 import com.qa.blog.core.exception.BlogException;
 
-import java.util.List;
+import java.util.Set;
+
 public record Post(Long id,
                    Author author,
                    Category category,
-                   List<Tag> tags,
+                   Set<Tag> tags,
                    String title,
                    String content,
                    String image) {

mariadb/src/main/java/com/qa/blog/mariadb/mapper/PostEntityMapper.java

@@ -10,6 +10,7 @@
 import com.qa.blog.mariadb.entity.TagEntity;
 import org.springframework.stereotype.Component;
 
+import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -18,9 +19,9 @@ public class PostEntityMapper {
     public Post toDomain(PostEntity entity) {
         Author author = new Author(entity.getAuthor().getId(), entity.getAuthor().getName());
         Category category = new Category(entity.getCategory().getId(), entity.getCategory().getName());
-        List<Tag> tags = entity.getTags().stream()
+        Set<Tag> tags = entity.getTags().stream()
             .map(tagEntityEntity -> new Tag(tagEntityEntity.getId(), tagEntityEntity.getName()))
-            .toList();
+            .collect(Collectors.toSet());
 
         return new Post(
             entity.getId(),

spring-web/src/main/java/com/qa/blog/springweb/mapper/PostWebMapper.java

@@ -10,15 +10,17 @@
 import com.qa.blog.core.domain.Tag;
 
 import java.util.List;
+import java.util.Set;
+import java.util.stream.Collectors;
 
 @Component
 public class PostWebMapper {
     public Post toDomain(PostRequest request) throws BlogException {
         Author author = new Author(null, request.author());
         Category category = new Category(null, request.category());
-        List<Tag> tags = request.tags().stream()
+        Set<Tag> tags = request.tags().stream()
             .map(tag -> new Tag(null, tag))
-            .toList();
+            .collect(Collectors.toSet());
             return new Post(
                 null,
                 author,
@@ -33,9 +35,9 @@ public Post toDomain(PostRequest request) throws BlogException {
     public Post toDomain(PostDTO postDTO) throws BlogException {
         Author author = new Author(null, postDTO.author());
         Category category = new Category(null, postDTO.category());
-        List<Tag> tags = postDTO.tags().stream()
+        Set<Tag> tags = postDTO.tags().stream()
             .map(tag -> new Tag(null, tag))
-            .toList();
+            .collect(Collectors.toSet());
         return new Post(
             postDTO.id(),
             author,

spring-web/src/test/java/com/qa/blog/springweb/post/PostControllerTest.java

@@ -23,7 +23,9 @@
 import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 import static org.mockito.ArgumentMatchers.any;
 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
@@ -61,9 +63,10 @@ void createPostSuccessfully() throws Exception {
         var postDomain = new Post(42L,
             new Author(41L, "Antonio Alvino"),
             new Category(33L, "Tech"),
-            new ArrayList<>(List.of(
+            new HashSet<>(Set.of(
                 new Tag(1L, "Java"),
-                new Tag(2L, "Programming"))),
+                new Tag(2L, "Programming"))) {
+            },
             "Titolo",
             "Contenuto 123 Prova",
             "http://example.com/image.jpg");