[java] NullAssignment - FP with ternary and null as method argument

[KroArtem]

Affects PMD Version:
6.20

Rule: NullAssignment
Description:

Code Sample demonstrating the issue:

public String methodOne(String one, String two) {
        return "test";
    }
public String methodTwo(String one, String two) {
        List<String> strings = new ArrayList<>();
->>        return methodOne("one", strings.isEmpty() ? null : "two");
    }

Running PMD through: [CLI | Ant | Maven | Gradle | Designer | Other]
Programmatically

[KroArtem]

Possible duplicate of #1050 , #1669

Will look for root of the problem later

[adangel]

This has been fixed with PMD 7.0.0-rc1.