NastasiyaT/java-project-99

package hexlet.code.mapper;

import hexlet.code.model.BaseEntity;
import jakarta.persistence.EntityManager;
import org.mapstruct.Mapper;
import org.mapstruct.MappingConstants;
import org.mapstruct.TargetType;
import org.springframework.beans.factory.annotation.Autowired;

@Mapper(
        componentModel = MappingConstants.ComponentModel.SPRING
)
public abstract class ReferenceMapper {
    @Autowired
    private EntityManager entityManager;

    public final <T extends BaseEntity> T toEntity(Long id, @TargetType Class<T> entityClass) {
        return id != null ? entityManager.find(entityClass, id) : null;
    }
}