42 lines
1.5 KiB
Java
42 lines
1.5 KiB
Java
package uulm.teamname.marvelous.gamelibrary.json;
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import jakarta.validation.ConstraintViolation;
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import jakarta.validation.Validator;
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import java.util.Optional;
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import java.util.Set;
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import java.util.stream.Collectors;
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public class Validation {
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private Validation() {}
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private static final Validator validator;
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static {
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var factory = jakarta.validation.Validation.buildDefaultValidatorFactory();
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validator = factory.getValidator();
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}
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public static Set<ConstraintViolation<Object>> validate(Object object) {
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return validator.validate(object);
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}
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/**
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* Validates the given object by using a {@link Validator}, and generates
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* a {@link String} from the violations. If there aren't any violations, and the object perfectly
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* conforms to the shape it should be in, an empty optional is returned.
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* @param object is the object to validate
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* @return an {@link Optional}<{@link String}> describing the violations the object commits,
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* or an empty {@link Optional} if there aren't any
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*/
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public static Optional<String> validateAndGetString(Object object) {
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var violations = validator.validate(object);
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if (violations.isEmpty()) return Optional.empty();
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else {
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return Optional.of(violations.stream()
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.map(violation -> violation.getPropertyPath() + ": " + violation.getMessage())
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.collect(Collectors.joining(", ")));
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}
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}
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}
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