如何告诉 IntelliJ IDEA 方法正在检查 null 值（ConstantConditions 警告）

Question

We have a common method that we shared across our codebase to check if a response is empty, including null body. This is the signature of the method

public static <T> boolean checkResponseEmpty(ResponseEntity<T> responseEntity);

Is there a way (maybe by adding annotation) to tell the IDEA that we've checked for null value on some fields, and it does not have to tell us a warning for ConstantConditions for that object and the fields (see screenshot).

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PS: I already know that I can suppress the warning with //noinspection ConstantConditions but I don't event want to do that.

Answer 1

IDEA can see the check for 'response', but there are no explicit checks for 'getBody' or 'getArrivals'. First, you can extract 'response.getBody()' to a variable and check if it's not null. Second, you can use JetBrains '@NotNull' annotation on a return of 'getBody' and 'getArrivals' if it's suites your code logic (see https://www.jetbrains.com/help/idea/nullable-and-notnull-annotations.html )