io.convergence_platform.common.validations.ValidateBase64Validator Maven / Gradle / Ivy

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Holds the common functionality needed by all Convergence Platform-based services written in Java.

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package io.convergence_platform.common.validations;

import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;

import java.util.Base64;

public class ValidateBase64Validator implements ConstraintValidator {
    public static void pathVariable(String value, String varName) {
        boolean valid = true;
        if ("".equals(value)) {
            valid = false;
        } else {
            valid = validate(value);
        }

        ValidationHelper.raiseValidationErrorForPathVariable(valid, "base64", varName);
    }

    @Override
    public boolean isValid(String value, ConstraintValidatorContext context) {
        return validate(value);
    }

    private static boolean validate(String value) {
        if (value == null) {
            return false;
        }

        try {
            Base64.getDecoder().decode(value);
        } catch (IllegalArgumentException ex) {
            return false;
        }

        return true;
    }
}