阿里技术专家详解ddd系列-domainprimitive(代码片段)

关键词：

Long userId;
String name;
String phone;
String address;
Long repId;




SalesRepRepository salesRepRepo;
UserRepository userRepo;

User
ValidationException
(name == || name.length() == ValidationException(
(phone == || !isValidPhoneNumber(phone))
ValidationException(
String areaCode = String[] areas = String[] (i = String prefix = phone.substring( (Arrays.asList(areas).contains(prefix))
areaCode = prefix;


SalesRep rep = salesRepRepo.findRep(areaCode);

User user = User();
user.name = name;
user.phone = phone;
user.address = address;
(rep != user.repId = rep.repId;


userRepo.save(user);



String pattern = phone.matches(pattern);

(phone == || !isValidPhoneNumber(phone))
ValidationException((phone == || !isValidPhoneNumber(phone) || !isValidCellNumber(phone))
ValidationException((phone == ValidationException((!isValidPhoneNumber(phone))
ValidationException( @NotNull @NotBlank String name,
@NotNull @Pattern(regexp = String phone,
@NotNull String address
);

User
ValidationUtils.validateName(name); ValidationUtils.validatePhone(phone);
ValidationUtils.validateAddress(address);
...

String[](i = String prefix = phone.substring( (Arrays.asList(areas).contains(prefix))
areaCode = prefix;


SalesRep rep = salesRepRepo.findRep(areaCode);

String
(i = String prefix = phone.substring( (isAreaCode(prefix))
prefix;



String[] areas = String[] Arrays.asList(areas).contains(prefix);

String number;
String
number;



(number == ValidationException( (isValid(number))
ValidationException(


String
(i = String prefix = number.substring( (isAreaCode(prefix))
prefix;





String[] areas = String[] Arrays.asList(areas).contains(prefix);



String pattern = number.matches(pattern);

这两个概念加起来，构造成了本文标题的Domain Primitive（DP）。

UserId userId;
Name name;
PhoneNumber phone;
Address address;
RepId repId;


User @NotNull Name name,
@NotNull PhoneNumber phone,
@NotNull Address address
)
SalesRep rep = salesRepRepo.findRep(phone.getAreaCode());

User user = User();
user.name = name;
user.phone = phone;
user.address = address;
(rep != user.repId = rep.repId;


userRepo.saveUser(user);

User Name(Address(PhoneNumber(User @NotNull Name name,
@NotNull PhoneNumber phone,
@NotNull Address address
) userRepo.save(user);

BankService.transfer(money,
BigDecimal amount;
Currency currency;

BankService.transfer(money, recipientId);

(money.getCurrency().equals(targetCurrency))
BankService.transfer(money, recipientId);

BigDecimal rate = ExchangeService.getRate(money.getCurrency(), targetCurrency);
BigDecimal targetAmount = money.getAmount().multiply(BigDecimal(rate));
Money targetMoney = Money(targetAmount, targetCurrency);
BankService.transfer(targetMoney, recipientId);

BigDecimal rate;
Currency from;
Currency to;




Money
notNull(fromMoney);
isTrue( BigDecimal targetAmount = fromMoney.getAmount().multiply(rate);
Money(targetAmount, to);


ExchangeRate rate = ExchangeService.getRate(money.getCurrency(), targetCurrency);
Money targetMoney = rate.exchange(money);
BankService.transfer(targetMoney, recipientId);