18 lines
599 B
Java
18 lines
599 B
Java
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package io.spring.application.user;
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import io.spring.core.user.UserRepository;
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import javax.validation.ConstraintValidator;
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import javax.validation.ConstraintValidatorContext;
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import org.springframework.beans.factory.annotation.Autowired;
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class DuplicatedUsernameValidator
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implements ConstraintValidator<DuplicatedUsernameConstraint, String> {
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@Autowired private UserRepository userRepository;
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@Override
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public boolean isValid(String value, ConstraintValidatorContext context) {
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return (value == null || value.isEmpty()) || !userRepository.findByUsername(value).isPresent();
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}
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}
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