25 lines
1 KiB
Java
25 lines
1 KiB
Java
package eu.ztsh.wymiana.validation;
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import eu.ztsh.wymiana.web.model.CurrencyExchangeRequest;
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import jakarta.validation.ConstraintValidator;
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import jakarta.validation.ConstraintValidatorContext;
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public class ValidExchangeRequestValidator implements
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ConstraintValidator<ValidExchangeRequest, CurrencyExchangeRequest> {
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@Override
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public boolean isValid(CurrencyExchangeRequest request,
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ConstraintValidatorContext constraintValidatorContext) {
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if (request == null) {
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return false;
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}
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// Apart from @NotNull annotation we need to check if request.from() != null to avoid NPE in equals
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return (request.from() != null && !request.from().equals(request.to()))
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&& !((request.toBuy() == null && request.toSell() == null)
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|| (request.toBuy() != null && request.toSell() != null))
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&& ((request.toBuy() != null && request.toBuy() >= 0)
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|| (request.toSell() != null && request.toSell() >= 0));
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}
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}
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