Refactor of mappers for car component

component/src/main/java/cz/muni/pa165/component/mapper/CarComponentMapper.java

+package cz.muni.pa165.component.mapper;
+
+import cz.muni.pa165.common_library.dtos.CarComponentRequestDto;
+import cz.muni.pa165.common_library.dtos.CarComponentResponseDto;
+import cz.muni.pa165.component.data.model.CarComponent;
+import org.springframework.stereotype.Component;
+
+/**
+ * Car component mapper.
+ */
+@Component
+public class CarComponentMapper {
+  /**
+   *
+   * @param carComponentDto of a car component.
+   * @return car component.
+   */
+  public CarComponent carComponentDtoConverterWithoutId(CarComponentRequestDto carComponentDto) {
+    return CarComponent.builder()
+        .id(null)
+        .weight(carComponentDto.getWeight())
+        .price(carComponentDto.getPrice())
+        .manufacturer(carComponentDto.getManufacturer())
+        .name(carComponentDto.getName())
+        .build();
+  }
+
+  /**
+   *
+   * @param carComponentDto with id.
+   * @return car component.
+   */
+  public CarComponent carComponentDtoConverter(CarComponentResponseDto carComponentDto) {
+    return CarComponent.builder()
+        .id(carComponentDto.getId())
+        .weight(carComponentDto.getWeight())
+        .price(carComponentDto.getPrice())
+        .manufacturer(carComponentDto.getManufacturer())
+        .name(carComponentDto.getName())
+        .build();
+  }
+
+  /**
+   *
+   * @param carComponent ...
+   * @return response dto.
+   */
+  public CarComponentResponseDto carComponentConverter(CarComponent carComponent) {
+    return CarComponentResponseDto.builder()
+        .id(carComponent.getId())
+        .weight(carComponent.getWeight())
+        .price(carComponent.getPrice())
+        .manufacturer(carComponent.getManufacturer())
+        .name(carComponent.getName())
+        .build();
+  }
+}

component/src/main/java/cz/muni/pa165/component/service/ComponentService.java

@@ -3,9 +3,10 @@ package cz.muni.pa165.component.service;
 import cz.muni.pa165.common_library.dtos.CarComponentRequestDto;
 import cz.muni.pa165.common_library.dtos.CarComponentResponseDto;
 import cz.muni.pa165.common_library.exception.DatabaseException;
-import cz.muni.pa165.component.data.model.CarComponent;
 import cz.muni.pa165.component.data.repository.ComponentRepositoryInterface;
 import java.util.List;
+
+import cz.muni.pa165.component.mapper.CarComponentMapper;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
@@ -17,16 +18,18 @@ import org.springframework.transaction.annotation.Transactional;
 @Service
 public class ComponentService implements ComponentServiceInterface {
 
-  @Autowired
   ComponentRepositoryInterface componentRepository;
+  CarComponentMapper carComponentMapper;
 
-  ComponentService(ComponentRepositoryInterface componentRepository) {
+  @Autowired
+  ComponentService(ComponentRepositoryInterface componentRepository, CarComponentMapper carComponentMapper) {
     this.componentRepository = componentRepository;
+    this.carComponentMapper = carComponentMapper;
   }
 
   public CarComponentResponseDto postCarComponent(CarComponentRequestDto carComponentDto) {
-    return carComponentConverter(componentRepository.save(
-        carComponentDtoConverterWithoutId(carComponentDto)));
+    return carComponentMapper.carComponentConverter(componentRepository.save(
+        carComponentMapper.carComponentDtoConverterWithoutId(carComponentDto)));
   }
 
   /**
@@ -37,7 +40,7 @@ public class ComponentService implements ComponentServiceInterface {
    */
   @Transactional(readOnly = true)
   public CarComponentResponseDto getCarComponentById(Long carComponentId) {
-    return carComponentConverter(componentRepository.findById(carComponentId).orElseThrow(
+    return carComponentMapper.carComponentConverter(componentRepository.findById(carComponentId).orElseThrow(
         () -> new DatabaseException("Something went wrong when finding car component with id: "
             + carComponentId + " in the database.")));
   }
@@ -51,7 +54,7 @@ public class ComponentService implements ComponentServiceInterface {
   public List<CarComponentResponseDto> getAllCarComponents() {
     return componentRepository.findAll()
         .stream()
-        .map(this::carComponentConverter)
+        .map(carComponentMapper::carComponentConverter)
         .toList();
   }
 
@@ -65,34 +68,4 @@ public class ComponentService implements ComponentServiceInterface {
     componentRepository.deleteById(carComponentId);
     return "Car component with id: " + carComponentId + "was successfully deleted";
   }
-
-  CarComponent carComponentDtoConverterWithoutId(CarComponentRequestDto carComponentDto) {
-    return CarComponent.builder()
-        .id(null)
-        .weight(carComponentDto.getWeight())
-        .price(carComponentDto.getPrice())
-        .manufacturer(carComponentDto.getManufacturer())
-        .name(carComponentDto.getName())
-        .build();
-  }
-
-  CarComponent carComponentDtoConverter(CarComponentResponseDto carComponentDto) {
-    return CarComponent.builder()
-        .id(carComponentDto.getId())
-        .weight(carComponentDto.getWeight())
-        .price(carComponentDto.getPrice())
-        .manufacturer(carComponentDto.getManufacturer())
-        .name(carComponentDto.getName())
-        .build();
-  }
-
-  CarComponentResponseDto carComponentConverter(CarComponent carComponent) {
-    return CarComponentResponseDto.builder()
-        .id(carComponent.getId())
-        .weight(carComponent.getWeight())
-        .price(carComponent.getPrice())
-        .manufacturer(carComponent.getManufacturer())
-        .name(carComponent.getName())
-        .build();
-  }
 }