Method: createPlayerBuilder()

1: package de.fhdw.gaming.ipspiel23.dilemma.domain.internals;
2:
3: import java.util.ArrayList;
4: import java.util.HashMap;
5: import java.util.List;
6: import java.util.Map;
7: import java.util.stream.Collectors;
8:
9: import de.fhdw.gaming.core.domain.DefaultObserverFactoryProvider;
10: import de.fhdw.gaming.core.domain.GameBuilder;
11: import de.fhdw.gaming.core.domain.GameException;
12: import de.fhdw.gaming.core.domain.ObserverFactoryProvider;
13: import de.fhdw.gaming.ipspiel23.dilemma.domain.IDilemmaGame;
14: import de.fhdw.gaming.ipspiel23.dilemma.domain.IDilemmaGameBuilder;
15: import de.fhdw.gaming.ipspiel23.dilemma.domain.IDilemmaPlayer;
16: import de.fhdw.gaming.ipspiel23.dilemma.domain.IDilemmaPlayerBuilder;
17: import de.fhdw.gaming.ipspiel23.dilemma.domain.IDilemmaStrategy;
18: import de.fhdw.gaming.ipspiel23.dilemma.moves.internals.DilemmaMove;
19:
20: /**
21: * Implements {@link IDilemmaGameBuilder}.
22: */
23: public class DilemmaGameBuilder implements IDilemmaGameBuilder {
24:
25: /**
26: * The {@link ObserverFactoryProvider}.
27: */
28: private ObserverFactoryProvider observerFactoryProvider;
29:
30: /**
31: * The players participating in this game.
32: */
33: private final List<IDilemmaPlayer> players;
34:
35: /**
36: * The player builders used to create the players.
37: * (player name -> builder)
38: */
39: private final Map<String, DilemmaPlayerBuilder> playerBuilders;
40:
41: /**
42: * The maximum computation time per move in seconds.
43: */
44: private int maxComputationTimePerMove;
45:
46: /**
47: * Creates a Dilemma game builder.
48: */
49: public DilemmaGameBuilder() {
50: this.players = new ArrayList<>(2);
51: this.playerBuilders = new HashMap<>();
52: this.observerFactoryProvider = new DefaultObserverFactoryProvider();
53: this.maxComputationTimePerMove = GameBuilder.DEFAULT_MAX_COMPUTATION_TIME_PER_MOVE;
54: }
55:
56: @Override
57: public IDilemmaPlayerBuilder createPlayerBuilder() {
58: return new DilemmaPlayerBuilder(this);
59: }
60:
61: /**
62: * Called by {@link DilemmaPlayerBuilder} when a player is built.
63: * Required for strategy injection.
64: * @param builder The builder that built the player.
65: * @param player The player that was built.
66: */
67: void onPlayerBuilt(final DilemmaPlayerBuilder builder, final IDilemmaPlayer player) {
68: this.playerBuilders.put(player.getName(), builder);
69: }
70:
71: @Override
72: public IDilemmaGameBuilder addPlayer(final IDilemmaPlayer player, final IDilemmaStrategy strategy)
73: throws GameException {
74:
75: if (this.players.size() >= 2) {
76: throw new GameException(String.format("More than two players are not allowed."));
77: }
78: final DilemmaPlayerBuilder builder = playerBuilders.getOrDefault(player.getName(), null);
79: if (builder == null) {
80: throw new GameException("Attempted to add player that was not built using a "
81: + DilemmaPlayerBuilder.class.getSimpleName());
82: }
83: // we need a way to store the strategy in the player instance (because that's where it belongs)
84: // that is handled via an internal callback set in the ctor of the player.
85: // We don't want client code to be able to modify strategies, so no simple public setters :)
86: builder.injectPlayerStrategyUsingHook(player, strategy);
87: players.add(player);
88: return this;
89: }
90:
91: @Override
92: public IDilemmaGameBuilder changeMaximumComputationTimePerMove(final int newMaxComputationTimePerMove) {
93: this.maxComputationTimePerMove = newMaxComputationTimePerMove;
94: return this;
95: }
96:
97: @Override
98: public IDilemmaGameBuilder changeObserverFactoryProvider(final ObserverFactoryProvider newObserverFactoryProvider) {
99: this.observerFactoryProvider = newObserverFactoryProvider;
100: return this;
101: }
102:
103: /**
104: * Builds the game with the predefined parameters.
105: */
106: @Override
107: public IDilemmaGame build(final int id) throws GameException, InterruptedException {
108: if (this.players.size() != 2) {
109: throw new GameException("A Dilemma game needs exactly two players.");
110: }
111:
112: final DilemmaState initialState = new DilemmaState(this.players.get(0), this.players.get(1));
113: final Map<String, IDilemmaStrategy> strategies = this.players
114: .stream()
115: .collect(Collectors.toMap(p -> p.getName(), p -> p.getStrategy()));
116:
117: return new DilemmaGame(
118: id,
119: initialState,
120: strategies,
121: this.maxComputationTimePerMove,
122: DilemmaMove.class::isInstance,
123: this.observerFactoryProvider);
124: }
125: }