Java Enum to initialize with condition

Question

Say in some condition I want to initialize my enum Foo with the following values.

private enum Foo {
  BAR1("1"),
  BAR2("2"),
  BAR3("3")
}

In some other cases, I want a different set of values.

private enum Foo {
  BAR1("x"),
  BAR2("y"),
  BAR3("z")
}

Then later in other code, it can use the same enum for processing. How can I do this? Or is there other better approach doing achieve my goal?

Answer 1

You can have multiple values in the enum initializer, and then logic to pick the appropriate value:

enum Foo {
  BAR1("1", "x"),
  BAR2("2", "y"),
  BAR3("3", "z");

  private final String first, second;

  private Foo(String first, String second) {
    this.first = first; this.second = second;
  }

  String value(boolean condition) {
    return condition ? first : second;
  }
}