// The MIT License (MIT)

//

// Copyright (c) 2018 Robert C. Seacord

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in all

// copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

// SOFTWARE.

package MET08J;

import com.google.common.testing.EqualsTester;

import java.util.Objects;

class xCard extends Card {

final private String suit;

private xCard(int number, String type) {

super(number);

this.suit = type;

}

@Override

public boolean equals(Object o) {

// if (this == o) return true;

// if (!(o instanceof xCard)) return false;

// if (!super.equals(o)) return false;

// xCard xCard = (xCard) o;

// return Objects.equals(suit, xCard.suit);

if (this == o) return true;

if (!(o instanceof Card)) return false;

// Normal Card, do not compare type

if (!(o instanceof xCard)) return o.equals(this);

// It is an xCard, compare type as well

xCard xc = (xCard) o;

return super.equals(o) && Objects.equals(suit, xc.suit);

}

@Override

public int hashCode() {

return Objects.hash(super.hashCode(), suit);

}

public static void main(String[] args) {

xCard p1 = new xCard(1, "heart");

Card p2 = new Card(1);

xCard p3 = new xCard(1, "diamond");

// p1 and p2 compare equal and p2 and p3 compare equal,

// but p1 and p3 compare unequal, violating the transitivity requirement.

// The Card class has no knowledge of the XCard class

// and consequently cannot determine that p2 and p3 have different values

// for the field type.

System.out.println(p1.equals(p2)); // Returns true

System.out.println(p2.equals(p3)); // Returns true

System.out.println(p1.equals(p3)); // Returns false, violating transitivity

new EqualsTester()

.addEqualityGroup(p1, p2)

.addEqualityGroup(p3)

.testEquals();

} // end main

} // end class xCard