Merge pull request #7610 from kivicko/BAEL-3097-mapstruct-custom-method

BAEL-3097 init for mapstruct custom mapping method

mapstruct/pom.xml

@@ -65,7 +65,7 @@
     </build>
 
     <properties>
-        <org.mapstruct.version>1.3.0.Beta2</org.mapstruct.version>
+        <org.mapstruct.version>1.3.0.Final</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>

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

@@ -0,0 +1,11 @@
+package com.baeldung.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class UserBodyImperialValuesDTO {
+    private int inch;
+    private int pound;
+}

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

@@ -0,0 +1,11 @@
+package com.baeldung.entity;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class UserBodyValues {
+    private double kilogram;
+    private double centimeter;
+}

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

@@ -0,0 +1,13 @@
+package com.baeldung.mapper;
+
+import org.mapstruct.Qualifier;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Qualifier
+@Target(ElementType.METHOD)
+@Retention(RetentionPolicy.CLASS)
+public @interface PoundToKilogramMapper {}

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

@@ -0,0 +1,28 @@
+package com.baeldung.mapper;
+
+import com.baeldung.dto.UserBodyImperialValuesDTO;
+import com.baeldung.entity.UserBodyValues;
+import org.mapstruct.Mapper;
+import org.mapstruct.Mapping;
+import org.mapstruct.Named;
+import org.mapstruct.factory.Mappers;
+
+@Mapper
+public interface UserBodyValuesMapper {
+
+    UserBodyValuesMapper INSTANCE = Mappers.getMapper(UserBodyValuesMapper.class);
+
+    @Mapping(source = "pound", target = "kilogram", qualifiedBy = PoundToKilogramMapper.class)
+    @Mapping(source = "inch", target = "centimeter", qualifiedByName = "inchToCentimeter")
+    public UserBodyValues userBodyValuesMapper(UserBodyImperialValuesDTO dto);
+
+    @Named("inchToCentimeter")
+    public static double inchToCentimeter(int inch) {
+        return inch * 2.54;
+    }
+
+    @PoundToKilogramMapper
+    public static double poundToKilogram(int pound) {
+        return pound * 0.4535;
+    }
+}

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

@@ -0,0 +1,47 @@
+package com.baeldung.mapper;
+
+import com.baeldung.dto.UserBodyImperialValuesDTO;
+import com.baeldung.entity.UserBodyValues;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+
+public class UserBodyValuesMapperUnitTest {
+
+    @Test
+    public void givenUserBodyImperialValuesDTOToUserBodyValuesObject_whenMaps_thenCorrect() {
+        UserBodyImperialValuesDTO dto  = new UserBodyImperialValuesDTO();
+        dto.setInch(10);
+        dto.setPound(100);
+
+        UserBodyValues obj = UserBodyValuesMapper.INSTANCE.userBodyValuesMapper(dto);
+
+        assertNotNull(obj);
+        assertEquals(25.4, obj.getCentimeter(), 0);
+        assertEquals(45.35, obj.getKilogram(), 0);
+    }
+
+    @Test
+    public void givenUserBodyImperialValuesDTOWithInchToUserBodyValuesObject_whenMaps_thenCorrect() {
+        UserBodyImperialValuesDTO dto = new UserBodyImperialValuesDTO();
+        dto.setInch(10);
+
+        UserBodyValues obj = UserBodyValuesMapper.INSTANCE.userBodyValuesMapper(dto);
+
+        assertNotNull(obj);
+        assertEquals(25.4, obj.getCentimeter(), 0);
+    }
+
+    @Test
+    public void givenUserBodyImperialValuesDTOWithPoundToUserBodyValuesObject_whenMaps_thenCorrect() {
+        UserBodyImperialValuesDTO dto = new UserBodyImperialValuesDTO();
+        dto.setPound(100);
+
+        UserBodyValues obj = UserBodyValuesMapper.INSTANCE.userBodyValuesMapper(dto);
+
+        assertNotNull(obj);
+        assertEquals(45.35, obj.getKilogram(), 0);
+    }
+}