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Commit 4eb07fd

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Part 25: Add UserReadMapper.java
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package spring.oldboy.mapper;
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import lombok.RequiredArgsConstructor;
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import org.springframework.stereotype.Component;
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import spring.oldboy.database.entity.User;
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import spring.oldboy.dto.CompanyReadDto;
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import spring.oldboy.dto.UserReadDto;
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import java.util.Optional;
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/* Будет bean-ом */
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@Component
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/* При наличии final полей в классе используем аннотацию ниже */
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@RequiredArgsConstructor
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public class UserReadMapper implements Mapper<User, UserReadDto> {
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private final CompanyReadMapper companyReadMapper;
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@Override
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public UserReadDto map(User object) {
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/*
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В зависимости от ситуации у нашего User может отсутствовать запись в поле
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компания, и такая ситуация требует обработки - мы либо возвращаем компанию,
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при наличии, в противном случае отдаем null.
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*/
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CompanyReadDto company = Optional.ofNullable(object.getCompany())
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.map(companyReadMapper::map)
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.orElse(null);
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return new UserReadDto(
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object.getId(),
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object.getUsername(),
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object.getBirthDate(),
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object.getFirstname(),
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object.getLastname(),
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object.getImage(),
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object.getRole(),
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company
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);
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}
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}

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