Method: toString()

1: /*
2: * Copyright © 2021-2023 Fachhochschule für die Wirtschaft (FHDW) Hannover
3: *
4: * This file is part of ipspiel24-GD.
5: *
6: * ipspiel24-GD is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
7: * License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later
8: * version.
9: *
10: * ipspiel24-GD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
11: * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12: *
13: * You should have received a copy of the GNU General Public License along with ipspiel24-GD. If not, see
14: * <http://www.gnu.org/licenses/>.
15: */
16: package de.fhdw.gaming.GefangenenDilemma.strategy.stratsWithBrain;
17:
18: import java.util.List;
19: import java.util.Map.Entry;
20: import java.util.Optional;
21:
22: import de.fhdw.gaming.GefangenenDilemma.domain.GDPlayer;
23: import de.fhdw.gaming.GefangenenDilemma.domain.GDState;
24: import de.fhdw.gaming.GefangenenDilemma.domain.GDStrategy;
25: import de.fhdw.gaming.GefangenenDilemma.moves.GDMove;
26: import de.fhdw.gaming.GefangenenDilemma.moves.factory.GDMoveFactory;
27: import de.fhdw.gaming.GefangenenDilemma.moves.impl.GDSnitchMove;
28: import de.fhdw.gaming.core.domain.Move;
29: import de.fhdw.gaming.memory.Key;
30: import de.fhdw.gaming.memory.impl.MemoryBrainImpl;
31: import de.fhdw.gaming.memory.impl.MemoryKeyImpl;
32: import de.fhdw.gaming.memory.impl.MemoryPairImpl;
33:
34: /**
35: * Tit for Two Tats Strategy:
36: * Cooperates in the first round and defects only if the opponent defected in the last two rounds.
37: */
38: public final class GDTitForTwoTatsStrategy implements GDStrategy {
39:
40: /**
41: * The factory for creating Gefangenen-Dilemma moves.
42: */
43: private final GDMoveFactory moveFactory;
44:
45: /**
46: * Creates an {@link GDTitForTwoTatsStrategy}.
47: *
48: * @param moveFactory The factory for creating Gefangenen-Dilemma moves.
49: */
50: GDTitForTwoTatsStrategy(final GDMoveFactory moveFactory) {
51: this.moveFactory = moveFactory;
52: }
53:
54: @Override
55: public Optional<GDMove> computeNextMove(
56: final int gameId,
57: final GDPlayer player,
58:
59: final GDState state,
60:
61: final long maxComputationTimePerMove) {
62:
63: GDPlayer opponent = null;
64: for (Entry<String, GDPlayer> entry : state.getPlayers().entrySet()) {
65: if (!entry.getValue().equals(player)) {
66: opponent = entry.getValue();
67: }
68: }
69:
70: final Key key = new MemoryKeyImpl(player, opponent, this);
71:
72: List<MemoryPairImpl> check = null;
73: if (MemoryBrainImpl.getInstance().getMemory(key) != null) {
74: check = MemoryBrainImpl.getInstance().getMemory(key).show();
75: }
76:
77: if (check == null || check.size() < 2) {
78: return Optional.of(this.moveFactory.createRemainSilentMove());
79: }
80:
81: final int size = check.size();
82: final Move<?, ?> lastMoveUsed1 = check.get(size - 1).getOpponentMove();
83: final Move<?, ?> lastMoveUsed2 = check.get(size - 2).getOpponentMove();
84: if (lastMoveUsed1.getClass().equals(GDSnitchMove.class)
85: && lastMoveUsed2.getClass().equals(GDSnitchMove.class)) {
86: return Optional.of(this.moveFactory.createSnitchMove());
87: } else {
88: return Optional.of(this.moveFactory.createRemainSilentMove());
89: }
90:
91: }
92:
93: @Override
94: public String toString() {
95: return GDTitForTwoTatsStrategy.class.getSimpleName();
96: }
97: }