Merge pull request #6268 from amit2103/BAEL-12114

[BAEL-12114] - Upgraded MapStruct article

mapstruct/pom.xml

@@ -30,6 +30,11 @@
             <version>${springframework.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${org.projectlombok.version}</version>
+        </dependency>
     </dependencies>
 
     <build>
@@ -48,6 +53,11 @@
                             <artifactId>mapstruct-processor</artifactId>
                             <version>${org.mapstruct.version}</version>
                         </path>
+                        <path>
+                            <groupId>org.projectlombok</groupId>
+                            <artifactId>lombok</artifactId>
+                            <version>${org.projectlombok.version}</version>
+                        </path>
                     </annotationProcessorPaths>
                 </configuration>
             </plugin>
@@ -55,10 +65,11 @@
     </build>
 
     <properties>
-        <org.mapstruct.version>1.1.0.Final</org.mapstruct.version>
+        <org.mapstruct.version>1.3.0.Beta2</org.mapstruct.version>
         <springframework.version>4.3.4.RELEASE</springframework.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>
+        <org.projectlombok.version>1.18.4</org.projectlombok.version>
     </properties>
 
 </project> 

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

@@ -0,0 +1,11 @@
+package com.baeldung.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class CarDTO {
+    private int id;
+    private String name;
+}

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

@@ -0,0 +1,33 @@
+package com.baeldung.dto;
+
+public class PersonDTO {
+    
+    private String id;
+    private String name;
+
+    public PersonDTO() {
+
+    }
+
+    public PersonDTO(String id, String name) {
+        super();
+        this.id = id;
+        this.name = name;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

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

@@ -0,0 +1,11 @@
+package com.baeldung.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class Car {
+    private int id;
+    private String name;
+}

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

@@ -0,0 +1,33 @@
+package com.baeldung.entity;
+
+public class Person {
+    
+    private String id;
+    private String name;
+    
+    public Person() {
+        
+    }
+    
+    public Person(String id, String name) {
+        super();
+        this.id = id;
+        this.name = name;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+}

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

@@ -0,0 +1,15 @@
+package com.baeldung.mapper;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.factory.Mappers;
+
+import com.baeldung.dto.CarDTO;
+import com.baeldung.entity.Car;
+
+@Mapper
+public interface CarMapper {
+    
+    CarMapper INSTANCE = Mappers.getMapper(CarMapper.class);
+    
+    CarDTO carToCarDTO(Car car);
+}

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

@@ -0,0 +1,17 @@
+package com.baeldung.mapper;
+
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.factory.Mappers;
+
+import com.baeldung.dto.PersonDTO;
+import com.baeldung.entity.Person;
+
+@Mapper
+public interface PersonMapper {
+    
+    PersonMapper INSTANCE = Mappers.getMapper(PersonMapper.class);
+    
+    @Mapping(target = "id", source = "person.id", defaultExpression = "java(java.util.UUID.randomUUID().toString())")
+    PersonDTO personToPersonDTO(Person person);
+}

mapstruct/src/test/java/com/baeldung/mapper/CarMapperUnitTest.java

@@ -0,0 +1,24 @@
+package com.baeldung.mapper;
+
+import static org.junit.Assert.assertEquals;
+
+import org.junit.Test;
+
+import com.baeldung.dto.CarDTO;
+import com.baeldung.entity.Car;
+
+public class CarMapperUnitTest {
+
+    @Test
+    public void givenCarEntitytoCar_whenMaps_thenCorrect() {
+        
+        Car entity  = new Car();
+        entity.setId(1);
+        entity.setName("Toyota");
+        
+        CarDTO carDto = CarMapper.INSTANCE.carToCarDTO(entity);
+
+        assertEquals(carDto.getId(), entity.getId());
+        assertEquals(carDto.getName(), entity.getName());
+    }
+}

mapstruct/src/test/java/com/baeldung/mapper/PersonMapperUnitTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.mapper;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+
+import org.junit.Test;
+
+import com.baeldung.dto.PersonDTO;
+import com.baeldung.entity.Person;
+
+public class PersonMapperUnitTest {
+
+    @Test
+    public void givenPersonEntitytoPersonWithExpression_whenMaps_thenCorrect() {
+        
+        Person entity  = new Person();
+        entity.setName("Micheal");
+        
+        PersonDTO personDto = PersonMapper.INSTANCE.personToPersonDTO(entity);
+
+        assertNull(entity.getId());
+        assertNotNull(personDto.getId());
+        assertEquals(personDto.getName(), entity.getName());
+    }
+}