control loop in AbstractGame + minor update in API documentation + minor change of name in a getter

2024-25/javaAPI/fr/iut_fbleau/GameAPI/AbstractBoard.java

@@ -6,9 +6,13 @@ import java.util.Deque;
 /**
  * An abstract class implementing the interface IBoard.
  *
- * used to implement some things to do with the update of the next player
- * which is the same for all games and provides also a minimal
- * implantation of the history mechanism.
+ * It is used to implement some things to do with the update of the next player
+ * which is the same for all turn taking games using a round robin and provides
+ * also a minimal implantation of the history mechanism.
+ *
+ * The current implantation works only for two players.
+ *
+ * 
  */
 public abstract class AbstractBoard implements IBoard{
 
@@ -40,7 +44,7 @@ public abstract class AbstractBoard implements IBoard{
     /**
      * @return the current player
      */
-    public Player getcurrentPlayer(){
+    public Player getCurrentPlayer(){
 	return this.currentPlayer;
     }
 
@@ -57,20 +61,18 @@ public abstract class AbstractBoard implements IBoard{
      */
     public abstract Result getResult();
 
+    
     /**
-     * checker of legal moves from this position
+     * checker of the legality of a ply from this position
      *
-     * @throws NullPointerException if the game is over
-     * @return the iterator
+     * @return true iff the ply is legal
      */
     public abstract boolean isLegal(AbstractPly c);
-
    
     
     /**
      * constructor of Iterator over legal moves from this position
      *
-     * @throws NullPointerException if the game is over
      * @return the iterator
      */
     public abstract Iterator<AbstractPly> iterator();
@@ -79,7 +81,8 @@ public abstract class AbstractBoard implements IBoard{
     
     /**
      * Plays a given move on the plateau.
-     * Should update history using 
+     * Should update history using removePlyFromHistory
+     *
      * @throws IllegalArgumentException if the move is always illegal (say from the wrong game)
      * @throws IllegalStateException if the move is not legal in this position
      *
@@ -96,4 +99,10 @@ public abstract class AbstractBoard implements IBoard{
      */
     public abstract void undoPly();
 
+    /**
+     * creates a safe copy of the board.
+     *
+     * @return the copy
+     */    
+    public abstract IBoard safeCopy();
 }

2024-25/javaAPI/fr/iut_fbleau/GameAPI/AbstractGame.java

@@ -0,0 +1,58 @@
+package fr.iut_fbleau.GameAPI;
+
+import java.util.EnumMap;
+
+/**
+ * The abstract class for an Abstract Game.
+ * All inheriting classes should be turn taking games (see method run).
+ *
+ * The abstract game knows the model of the current game state (something implementing
+ * an IBoard). It handles the players by providing a map from the Player class
+ * (an enum for the player order in the game) to the abstractGamePlayer class
+ * (a class that can choose a Ply from any given position). 
+ *
+ * The control loop in the run method selects the appropriate player, sends him
+ * what should be a copy of the current game state to help him make his decision.
+ * If a player returns an illegal move, an exception is thrown and the game stops.
+ * Otherwise, when the game finishes the method returns the result.
+ *
+ * The logic of the game rule is handled in the class IBoard.
+ * In particular, it is possible that the turn taking does not take form of a round
+ * robin and switches between players in a non uniform ad hoc fashion.
+ *
+ * Potential evolution of this class could take into account clocks for the players,
+ * which would be better handled here than in the Abstractboard class.
+ *
+ */
+public abstract class AbstractGame {
+
+    // board this game is played on
+    private IBoard currentBoard;
+
+    // a map from the enum Player to the genuine Player AbstractGamePlayer
+    private EnumMap<Player, AbstractGamePlayer> mapPlayers;
+    
+    //NB. pas de constructeur possible on est abstrait, il faut faire une usine abstraite.
+
+
+    /**
+     * boucle de contrôle du jeu.
+     *
+     * @throws IllegalStateException if a player proposes an IllegalMove at some point
+     * @return the Result of the game from the perspective of the first player.
+     */
+    public Result run(){
+	while(! currentBoard.isGameOver()) {
+	    AbstractGamePlayer player = mapPlayers.get(currentBoard.getCurrentPlayer());
+	    IBoard board = currentBoard.safeCopy();
+	    AbstractPly ply = player.giveYourMove(board);
+
+	    if (currentBoard.isLegal(ply)) {
+		currentBoard.doPly(ply);
+	    }
+	    else throw new IllegalStateException("Player "+ player + " is a bloody cheat. I give up.");
+	}
+
+	return currentBoard.getResult();
+    }
+}

2024-25/javaAPI/fr/iut_fbleau/GameAPI/IBoard.java

@@ -11,7 +11,7 @@ public interface IBoard {
     /**
      * @return the current player
      */
-    public Player getcurrentPlayer();
+    public Player getCurrentPlayer();
 
     /**
      * Returns the game status
@@ -27,10 +27,9 @@ public interface IBoard {
     public Result getResult();
 
     /**
-     * checker of legal moves from this position
+     * checker of the legality of a ply from this position
      *
-     * @throws NullPointerException if the game is over
-     * @return the iterator
+     * @return true iff the ply is legal
      */
     public boolean isLegal(AbstractPly c);
 
@@ -39,7 +38,6 @@ public interface IBoard {
     /**
      * constructor of Iterator over legal moves from this position
      *
-     * @throws NullPointerException if the game is over
      * @return the iterator
      */
     public Iterator<AbstractPly> iterator();
@@ -48,7 +46,7 @@ public interface IBoard {
     
     /**
      * Plays a given move on the plateau.
-     * Should update history using 
+     * 
      * @throws IllegalArgumentException if the move is always illegal (say from the wrong game)
      * @throws IllegalStateException if the move is not legal in this position
      *
@@ -60,10 +58,22 @@ public interface IBoard {
     /**
      * Resets the plateau to the position before the last move.
      *
-     * @throws IllegalStateException if nothing to undo in history
+     * @throws IllegalStateException if nothing to undo
      *
      */
     public void undoPly();
 
-
+    /**
+     * Creates a safe copy of the board.
+     *
+     * Intended to prevent cheating from a human via some interface,
+     * or from a bot playing via the API, or from a badly coded bot.
+     *
+     * Beware that the default implantation is unsafe and returns this.
+     *
+     * @return the copy
+     */    
+    public default IBoard safeCopy(){
+	return this;
+    }
 }