I have a method: This is how the user authorization test looks like: Is there any way to check the case when a user has entered the wrong password? In the case when I send the wrong password, it doesn’t work because given(this.repository.findByEmail(this.user.getEmail())).willReturn(Optional.of(this.use…
Tag: option-type
How to deal with warning ‘unsafe null type convertion’ when using java.lang.Optional
I would like to offer some accessors to a value-container (that is a java.lang.Map under the hood). When implementing accessors like this … ‘ofNullable’ is marked with ‘unsafe null type convertion’. Why is this? The parameter ofNullable is not marked as @NonNull. Is it, because e…
java 8 Optional with Map<String, Set> [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 9 months ago. Improve this question I have a Map<String, Set> getProperties which returns {BUILDING=[a, b, c]}, {NEW_BUIL…
Generic type-casting method returning an Optional object
I have a method: That allows me to invoke it like so: And this is great. Except, now, I want load(…) to return an Optional<???> so that the interaction would look something like: What changes I need to make to load(…) method to make it capable of returning an Optional of <T>? Answer Yo…
How to get value from an optional object in another optional?
Basically,I need to get a size of optional list in an optional object. Something like: The code doesn’t look nice. What’s the elegant way to get it? With ifPresent().orElse()? Thanks in advance! Answer Consecutive map (or flatMap, in case something returns an Optional) operations, and a final orEl…
Java – code will always throw a Null Pointer Exception when no Property is present?
I have inherited the following java code, that gets the value of a property from a properties file: The intended behavior in the above flow is that personName will either be retrieved from the properties file or will be returned as null if its not there, and handled accordingly. However when the property is n…
How to reduce Optionals to throw an error once
I have the following response coming from a rest call and performing some logic based on what is returned. This is what I want. If the overall status code is NOT 200 OR If within the list of SimpleResponse, none of the SimpleResponse objects has a 200 httpCode, throw an error. The example below is incomplete.…
Set with Optional
I have this code: I want to replace this code to this: and map this field from myClass to myClass2 How i can do it? Answer Did you mean to use: For mapping I would suggest to read about MapStruct, it is a good tool.
Java 8 Optional: combine two possibly null object
I have to ensure if two values are non null. When the first and second have non null values, pass first as argument to second. If one of them are null value, then return false. This can be done in the following piece of code: It can also be done in short form: I was wondering how to do this
‘OptionalDouble.getAsDouble()’ without ‘isPresent()’ check
I’ve seen a bunch of solutions for this question but no matter what I try, IDEA still reports an error. Consider the following block: This reports a warning of ‘OptionalDouble.getAsDouble()’ without ‘isPresent()’ check. If I try this then it doesn’t compile: Neither does th…