A "NullPointerException" could be thrown; "context" is nullable here

Question

So I have an issue with SonarQube that I can not solve.

if (result instanceof AsyncResult) {
    // Make sure handle async has been called
    context.handleAsync();
    Result newResult = context.controllerReturned();
    if (newResult != null) {
        result = newResult;
    }
 }

Solution

SonarQube claims that context may be null here. If you know this is incorrect, you could just suppress this warning as a false positive. Otherwise, you should explicitly check if context is not null:

if (result instanceof AsyncResult && context != null) {
    // Here -------------------------^

    // Make sure handle async has been called
    context.handleAsync();
    Result newResult = context.controllerReturned();
    if (newResult != null) {
        result = newResult;
    }
}

Comments

[zerocewl]

Where is the context variable initialized?

[akash]

SonarQube is saying that it's possible that context can be null because it couldn't find any initialization to it. Do you want to ignore such errors?

[P. Lisi]

I solved by inserting Objects before context. Is it correct this way? Can you tell me the meaning?