I'm looking into Guice and I've been reading its documentation recently.

Reading the motivation section I don't understand the factories part, why they name it that way. To me that factory is just a wrapper for the implementing class they want it to return after calling getInstance().

public class CreditCardProcessorFactory {

  private static CreditCardProcessor instance;

  public static void setInstance(CreditCardProcessor creditCardProcessor) {
    instance = creditCardProcessor;
  }

  public static CreditCardProcessor getInstance() {
    if (instance == null) {
      throw new IllegalStateException("CreditCardProcessorFactory not initialized. "
          + "Did you forget to call CreditCardProcessor.setInstance() ?");
    }

    return instance;
  }
}

Why do they call it factory as well if it is neither an abstract factory nor a factory method? Or am I missing something?

Thanks.