I’m trying to write a function which will check if PNG file is not corrupted. Here I found a function, also provided below, which stores file bytes into its own byte array. I know that the first eight bytes of a PNG file always contain the same decimal values 137 80 78 71 13 10 26 10 (hex: 89 50
Tag: validation
How to raise a ConstraintValidationException in a test case for bean properties with validation annotations?
I’m trying to test that my beans have correct validation annotations. I’m using spring-boot. Here is an example test case: I expect the call to checkIfvalidated() and to setSomeProperty(null) to raise a ConstraintViolationException, and the tests to pass, but they both fail with: My pom.xml: Why i…
How do I only allow the user to enter sensible height and weight values in Edit Text? Java
I’m making a super simple BMI calculator app using Java in android studio but I’d like to make it so that the user is only able to enter sensible values for their height and weight. I was thinking something around 50cm-220cm for height and 3kg-150kg for weight. As it stands, they can enter any num…
How to check password for number of lowercase letters entered?
I am using the below script to check my passwords for length, number of uppercase letters and number of digits. Is there a way to make it also check for the number of lowercase letters? I tried to revamp my code a few times but each time I do it kicks out the other two checks. Thanks in advance! Answer
Where should I check if username already exist in rest api?
I am creating a rest application using Spring Boot. I’ve got three logical layers: controller, service, and repository. Where should I check if the given username and similar values already exist in the database? In the controller layer, I check user input (length, size, etc.) Can I also check username …
hibernate validator throws exception ValidationException: HV000028 for @Past annotation
I am validating an entity with a hibernate validator in a spring boot project. I got an exception for the Date validator @Past . I faced javax.validation.ValidationException: HV000028: Unexpected exception during isValid call This is the dependency I have in my gradle.build file implementation ‘org.spri…
Custom validation with javax.validation
I’m trying to make a custom java validation annotation and returns me Request processing failed; nested exception is javax.validation.ConstraintDeclarationException: HV000144: Cross parameter …
Why is @Validated required for validating Spring controller request parameters?
With the following validation setup in an annotated MVC controller: @Validated on the controller is required for the method parameter since it’s not a “complex” object. In comparison, the @Valid annotation on the setOther method works without the @Validated annotation. Why is @Validated requ…
Validating elements of a 2D array
My code for making sure an element isn’t over 100 or less than 0 is: Except no matter what the input is the answer is always true My input array is test should = false if I input this no? College rules mean I cannot use break; or return anywhere other than the end of the sub module. Answer You
Spring unit test issue with Validator
I am trying to write unit test for a validator class that I have. So within my UniqueEmailValidator class, I injected a @Service component to check if it exist. And I tried to write unit test for this constraint validator. How do I initialize the AccountService within the Validator class? It seem like it wasn…