org.alcibiade.chess.persistence

Class FenChessPosition

java.lang.Object

org.alcibiade.chess.persistence.FenChessPosition

All Implemented Interfaces:

ChessPosition

public class FenChessPosition
extends Object
implements ChessPosition

Uses a FEN-String (https://en.wikipedia.org/wiki/Forsyth%E2%80%93Edwards_Notation) and provides a ChessPosition-Object.

Created by Tobias Boese on 09.07.16.

Author:

Tobias Boese

Constructor Summary

Constructors

Constructor and Description
FenChessPosition(String fen)

Method Summary

Modifier and Type	Method and Description
int	getHalfMoveClock() This is the number of halfmoves since the last capture or pawn advance.
ChessBoardCoord	getLastPawnDMove() If a pawn has just moved two squares ahead, this will be the destination of this pawn.
int	getMoveNumber() Get the move number.
ChessSide	getNextPlayerTurn() Get the next player to move.
ChessPiece	getPiece(ChessBoardCoord coordinates) Get a piece from the board.
boolean	isCastlingAvailable(ChessSide side, boolean kingside) Check if castling is available at the current position.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FenChessPosition

public FenChessPosition(String fen)

Method Detail

getMoveNumber

public int getMoveNumber()

Description copied from interface: ChessPosition

Get the move number. It starts at 1, and is incremented after Black's move.

Specified by:

getMoveNumber in interface ChessPosition

Returns:

the move number.

getHalfMoveClock

public int getHalfMoveClock()

Description copied from interface: ChessPosition

This is the number of halfmoves since the last capture or pawn advance. This is used to determine if a draw can be claimed under the fifty-move rule.

Specified by:

getHalfMoveClock in interface ChessPosition

Returns:

the halfmove clock

getPiece

public ChessPiece getPiece(ChessBoardCoord coordinates)

Description copied from interface: ChessPosition

Get a piece from the board.

Specified by:

getPiece in interface ChessPosition

Parameters:

coordinates - the piece coordinates

Returns:

the piece at the coordinates, or null if the square is empty.

isCastlingAvailable

public boolean isCastlingAvailable(ChessSide side,
                                   boolean kingside)

Description copied from interface: ChessPosition

Check if castling is available at the current position. It does not check if the king can actually castle on the next move but rather if it can castle based on potential previous movements.

Specified by:

isCastlingAvailable in interface ChessPosition

Parameters:

side - which player should we check (may not be the next player of the position)

kingside - which castling side ? True for king side, false for queen side.

Returns:

true if castling is possible

getNextPlayerTurn

public ChessSide getNextPlayerTurn()

Description copied from interface: ChessPosition

Get the next player to move.

Specified by:

getNextPlayerTurn in interface ChessPosition

Returns:

the side of the next player.

getLastPawnDMove

public ChessBoardCoord getLastPawnDMove()

Description copied from interface: ChessPosition

If a pawn has just moved two squares ahead, this will be the destination of this pawn.

Specified by:

getLastPawnDMove in interface ChessPosition

Returns:

the destination of the pawn, or null if last move was not a two squares pawn move.