MIDTERM
CS320, Spring 2004

Upload your bean and JSP to the cs server and make sure they work there. Print a hard copy of your TTTBean.java and TicTacToe.jsp and turn it in at the end of the exam. Do not forget to put your name and your server account name on the hard copy.

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[Problem Description] Tic Tac Toe is a game played on a 3 by 3 grid by two players, Player 1 and Player 2. Player 1 starts by placing an O at an unoccupied grid postition. Then Player 2 places an X at an unoccupied grid position. Play alternates between Player 1 and 2 until one player's symbols occupy an entire line (vertical, horizontal, or diagonal), in which case that player wins; or the grid is filled, in which case the game is tied.

For this exam you are going to implement the Tic Tac Toe game using JSP. The game will be played by two human players, so no AI code is needed. To receive any credit at all for the exam, your implementation must follow the following specifications:

[Bean] Your JSP must use a Java Bean called TTTBean to keep track the progress of the game. In particular, the bean must have the following properties:

• move -- setting this property to n, where n is an integer value between 0 and 8, indicates a move at the grid position n (imagine the nine grid positions are numbered from 0 to 8 in a row-major order). Whether the move is by Player 1 or 2 is decided internally by the bean. e.g. the first move is by Player 1, second move by Player 2, third move by Player 1 and so on. Invalid moves such as a move outside the board or a move to an occupied position are simply ignored.
• new -- setting this property will clear the current game and starts a new one.
  
• status -- the value of this property shows the progress/outcome of the game. In particular
• 0: the game is underway
• 1: player 1 won
• 2: player 2 won
• 3: draw
  
• board -- the value of this property is a String array of size 9. Each element of the array corresponds to a grid postion of the board, and could be one of the following three values:
• "<a href=TicTacToe.jsp?move=i>_</a>" if position i is currently unoccupied.
• "<span style='color:red'>O</span>" if the position is occupied by Player 1's symbol.
• "<span style='color:blue'>X</span>" if the position is occupied by Player 2's symbol.

Note that move and new are write-only properties, which mean your bean doesn't need to have getMove() or getNew() method, while status and board are read-only properties, which means your bean doesn't need to have setStatus() or setBoard() method.

[JSP]  You should have a JSP file called TicTacToe.jsp which displays the following:

• A message of "Next move please:", "Player 1 won!! A new game?", "Player 2 won!! A new game?", or "Tied! A new game?", based on the status of the game.
• The game board as a 3 by 3 table.
  
• A link labelled as "New Game". Clicking on this link will clear the board and start a new game.

Here's some sample display:


You should use only HTML, Java beans, JSTL tags, and Expression Language (EL) in your JSP file. Any scripting element in the JSP file will incur a 5pt penalty per statement with the maximum penalty of 40pt. Directives and comments do not count as scripting elements.

[Grading Criteria]

1. TTTBean.java

• structure (5pt)
  
• move (10pt)
• new (5pt)
• status (20pt)
• board (15pt)
  

2. TicTacToe.jsp

• structure (10pt)
• message (10pt)
  
• board (20pt). to receive full credit you must use <c:forEach> to generate the board table.
  
• new game (5pt)

3. JSP does not work on cs.calstatela.edu (-30pt)