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/*******************************************************************************

* Companion code for the book "Introduction to Software Design with Java",

* 2nd edition by Martin P. Robillard.

*

* Copyright (C) 2022 by Martin P. Robillard

*

* This code is licensed under a Creative Commons

* Attribution-NonCommercial-NoDerivatives 4.0 International License.

*

* See http://creativecommons.org/licenses/by-nc-nd/4.0/

*

*******************************************************************************/

package e2.chapter9;

import java.util.List;

import java.util.Optional;

/**

* See section 9.5.

*

*/

public interface CardSelectionStrategy {

/**

* Select an instance of Card from pCards.

*

* @param A

* list of cards to choose from.

* @pre pCards != null && !pCards.isEmpty()

* @post If RETURN.isPresent(), pCards.contains(RETURN.get())

*/

Optional<Card> select(List<Card> pCards);

static Optional<Card> first(List<Card> pCards) {

return Optional.of(pCards.get(0));

}

static Optional<Card> lowestBlackCard(List<Card> pCards) {

return null; // This is a stub

}

static Optional<Card> highestFaceCard(List<Card> pCards) {

return null; // This is a stub

}

}