Item

pom.xml

@@ -54,6 +54,17 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-thymeleaf</artifactId>
 		</dependency>
+		<!-- QueryDSL APT Config -->
+		<dependency>
+			<groupId>com.querydsl</groupId>
+			<artifactId>querydsl-apt</artifactId>
+			<scope>provided</scope>
+		</dependency>
+		<!-- QueryDSL JPA Config -->
+		<dependency>
+			<groupId>com.querydsl</groupId>
+			<artifactId>querydsl-jpa</artifactId>
+		</dependency>
 	</dependencies>
 
 	<build>
@@ -70,6 +81,23 @@
 					</excludes>
 				</configuration>
 			</plugin>
+
+			<plugin>
+				<groupId>com.mysema.maven</groupId>
+				<artifactId>apt-maven-plugin</artifactId>
+				<version>1.1.3</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>process</goal>
+						</goals>
+						<configuration>
+							<outputDirectory>target/generated-sources/java</outputDirectory>
+							<processor>com.querydsl.apt.jpa.JPAAnnotationProcessor</processor>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
 		</plugins>
 	</build>
 

src/main/java/com/security/basic/configure/JpaConfiguration.java

@@ -0,0 +1,21 @@
+package com.security.basic.configure;
+
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import javax.persistence.EntityManager;
+import javax.persistence.PersistenceContext;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.jpa.repository.config.EnableJpaAuditing;
+
+@Configuration
+@EnableJpaAuditing
+public class JpaConfiguration {
+
+  @PersistenceContext
+  private EntityManager em;
+
+  @Bean
+  public JPAQueryFactory jpaQueryFactory () {
+    return new JPAQueryFactory(em);
+  }
+}

src/main/java/com/security/basic/mapped/BaseItem.java

@@ -0,0 +1,15 @@
+package com.security.basic.mapped;
+
+import javax.persistence.*;
+
+@MappedSuperclass
+public abstract class BaseItem {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id", nullable = false)
+    private Long id;
+
+    @Column(name = "name", nullable = false)
+    private String name;
+}

src/main/java/com/security/basic/mapped/BaseItemRepository.java

@@ -0,0 +1,36 @@
+package com.security.basic.mapped;
+
+import com.querydsl.core.types.Projections;
+import com.querydsl.jpa.impl.JPAQueryFactory;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Repository;
+
+import java.util.List;
+
+@RequiredArgsConstructor
+@Repository
+public class BaseItemRepository {
+
+    private final JPAQueryFactory queryFactory;
+
+    com.security.basic.mapped.QBaseItem qItemA = com.security.basic.mapped.QItemA.itemA._super;
+    com.security.basic.mapped.QBaseItem qItemB = com.security.basic.mapped.QItemB.itemB._super;
+
+    public List<ItemDto> itemAList() {
+        return queryFactory.select(Projections.constructor(ItemDto.class,
+                        qItemA.id,
+                        qItemA.name
+                ))
+                .from(qItemA)
+                .fetch();
+    }
+
+    public List<ItemDto> itemBList() {
+        return queryFactory.select(Projections.constructor(ItemDto.class,
+                        qItemB.id,
+                        qItemB.name
+                ))
+                .from(qItemB)
+                .fetch();
+    }
+}

src/main/java/com/security/basic/mapped/Controller.java

@@ -0,0 +1,25 @@
+package com.security.basic.mapped;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/mapped")
+public class Controller {
+
+    private final BaseItemRepository baseItemRepository;
+
+    @GetMapping("/a")
+    public ResponseEntity<?> a() {
+        return ResponseEntity.ok(baseItemRepository.itemAList());
+    }
+
+    @GetMapping("/b")
+    public ResponseEntity<?> b() {
+        return ResponseEntity.ok(baseItemRepository.itemBList());
+    }
+}

src/main/java/com/security/basic/mapped/ItemA.java

@@ -0,0 +1,8 @@
+package com.security.basic.mapped;
+
+import javax.persistence.Entity;
+
+@Entity
+public class ItemA extends BaseItem{
+
+}

src/main/java/com/security/basic/mapped/ItemB.java

@@ -0,0 +1,10 @@
+package com.security.basic.mapped;
+
+import javax.persistence.Entity;
+import javax.persistence.Table;
+
+@Table(name = "item_a")
+@Entity
+public class ItemB extends BaseItem{
+
+}

src/main/java/com/security/basic/mapped/ItemDto.java

@@ -0,0 +1,14 @@
+package com.security.basic.mapped;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+@AllArgsConstructor
+public class ItemDto {
+
+    private Long id;
+    private String name;
+}