Method: OthelloSkipMove(boolean)

1: /*
2: * Copyright © 2020 Fachhochschule für die Wirtschaft (FHDW) Hannover
3: *
4: * This file is part of othello-core.
5: *
6: * Othello-core is free software: you can redistribute it and/or modify it under
7: * the terms of the GNU General Public License as published by the Free Software
8: * Foundation, either version 3 of the License, or (at your option) any later
9: * version.
10: *
11: * Othello-core is distributed in the hope that it will be useful, but WITHOUT
12: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
13: * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
14: * details.
15: *
16: * You should have received a copy of the GNU General Public License along with
17: * othello-core. If not, see <http://www.gnu.org/licenses/>.
18: */
19: package de.fhdw.gaming.othello.core.moves.impl;
20:
21: import de.fhdw.gaming.core.domain.GameException;
22: import de.fhdw.gaming.othello.core.domain.OthelloField;
23: import de.fhdw.gaming.othello.core.domain.OthelloFieldState;
24: import de.fhdw.gaming.othello.core.domain.OthelloPlayer;
25: import de.fhdw.gaming.othello.core.domain.OthelloState;
26:
27: /**
28: * Represents a "move" which does nothing.
29: * <p>
30: * Note that this move is only allowed if the player is not able to do anything else.
31: */
32: final class OthelloSkipMove extends AbstractOthelloMove {
33:
34: /**
35: * {@code true} if a black token should be placed, and {@code false} if a white token should be placed.
36: */
37: private final boolean placingBlackToken;
38:
39: /**
40: * Creates an {@link OthelloSkipMove} object.
41: *
42: * @param placingBlackToken {@code true} if a black token should be placed, and {@code false} if a white token
43: * should be placed.
44: */
45: OthelloSkipMove(final boolean placingBlackToken) {
46: this.placingBlackToken = placingBlackToken;
47: }
48:
49: /**
50: * Returns {@code true} if a black token should be placed, and {@code false} if a white token should be placed.
51: */
52: boolean isPlacingBlackToken() {
53: return this.placingBlackToken;
54: }
55:
56: @Override
57: public void applyTo(final OthelloState state, final OthelloPlayer player) throws GameException {
58: if (this.isPlacingBlackToken() != player.isUsingBlackTokens()) {
59: throw new GameException(
60: String.format(
61: "Player %s cannot skip a %s move.",
62: player,
63: this.isPlacingBlackToken() ? OthelloFieldState.BLACK : OthelloFieldState.WHITE));
64: }
65:
66: for (final OthelloField field : state.getBoard().getFieldsBeing(OthelloFieldState.EMPTY).values()) {
67: if (field.isActive(this.placingBlackToken)) {
68: final OthelloFieldState fieldState = this.placingBlackToken ? OthelloFieldState.BLACK
69: : OthelloFieldState.WHITE;
70: throw new GameException(
71: String.format(
72: "Illegal skip move as placing a token being %s on the field at %s is possible.",
73: fieldState,
74: field.getPosition()));
75: }
76: }
77:
78: state.moveCompleted(true);
79: }
80:
81: @Override
82: public String toString() {
83: return String.format("Skipping %s move", this.placingBlackToken ? "black" : "white");
84: }
85: }