vivi-exercises/chess/pieces/Rook.java

package de.vivi.chess.pieces;

import de.vivi.chess.board.Board;
import de.vivi.chess.board.Field;

public class Rook extends Piece {

    private boolean isValid = false;

    public Rook(Color color, Type type) {
        super(color, type);
    }

    public Rook(Color color, Field field) {
        super(color, field);
    }

    public Rook(Color color, Type type, Field field) {
        super(color, type, field);
    }

    @Override
    public char getSymbol() {
        if (getColor() == Color.WHITE) {
            if (getType() == Type.ROOK) {
                symbol = '\u265C';
            }

        } else if (getColor() == Color.BLACK) {
            if (getType() == Type.ROOK) {
                symbol = '\u2656';
            }
        }
        return symbol;
    }

    @Override
    public boolean isValidMove(Board board, Field from, Field to) {
        if (from.getRow() == to.getRow()) {
            int columnStart = Math.min(from.getColumn(), to.getColumn()) + 1;
            int columnEnd = Math.max(from.getColumn(), to.getColumn());
            for (int column = columnStart; column < columnEnd; column++) {
                if (board.getPiece(Field.from(column, from.getRow())) != null) {
                    return false;
                }
            }
        } else if (from.getColumn() == to.getColumn()) {
            int rowStart = Math.min(from.getRow(), to.getRow()) + 1;
            int rowEnd = Math.max(from.getRow(), to.getRow());
            for (int row = rowStart; row < rowEnd; row++) {
                if (board.getPiece(Field.from(from.getColumn(), row)) != null) {
                    return false;
                }
            }
        } else {
            return false;
        }

        Piece destinationPiece = board.getPiece(to);
        if (destinationPiece == null) {
            return true;
        } else if (destinationPiece.getColor() != this.getColor()) {
            return true;
        }

        return false;
    }
}