Guava: Reducing Cyclomatic Complexity with Objects.firstNonNull(…)

PROBLEM

Ever written code like this?

Employee employee = employeeService.getByName(employeeName);

if (employee == null) {
    employee = new Employee();
}

While it works, it has several minor problems:-

  • The above code has cyclomatic complexity of 2 due to the if logic.
  • We cannot define final on employee object.
  • Too many lines of code, and seriously, it looks very 2003.

SOLUTION

Guava provides a much cleaner solution to address these problems:-

final Employee employee = Objects.firstNonNull(employeeService.getByName(employeeName),
                                               new Employee());
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