javalabra.shakki.engine.board.Tile.java Source code

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Here is the source code for javalabra.shakki.engine.board.Tile.java

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package javalabra.shakki.engine.board;

import com.google.common.collect.ImmutableMap;
import java.util.HashMap;
import java.util.Map;
import javalabra.shakki.engine.pieces.Piece;

/**
 *Pelilaudan ruutu.
 */
public abstract class Tile {

    protected final int tileCoordinate;

    /**
     * Tyhjt ruudut "vlimuistissa".
     */
    private static final Map<Integer, EmptyTile> EMPTY_TILES_CACHE = createAllPossibleEmptyTiles();

    private static Map<Integer, EmptyTile> createAllPossibleEmptyTiles() {
        final Map<Integer, EmptyTile> emptyTileMap = new HashMap();
        for (int i = 0; i < BoardUtils.NUM_TILES; i++) {
            emptyTileMap.put(i, new EmptyTile(i));
        }
        return ImmutableMap.copyOf(emptyTileMap);
    }

    public Tile(final int tileCoordinate) {
        this.tileCoordinate = tileCoordinate;
    }

    /**
     * Metodi luo pelilaudan ruudun. 
     * 
     * @param tileCoordinate ruudun koordinaattori
     * @param piece ruutuun tuleva nappula
     * 
     * @return Jos piece-parametrin on null, palauttaa EmptyTile-olion;
     * muuten OccupiedTile-olion, jolle annetaan piece parametrina.
     */
    public static Tile createTile(final int tileCoordinate, final Piece piece) {
        return piece != null ? new OccupiedTile(tileCoordinate, piece) : EMPTY_TILES_CACHE.get(tileCoordinate);
    }

    public int getTileCoordinate() {
        return this.tileCoordinate;
    }

    public abstract boolean isTileOccupied();

    public abstract Piece getPiece();
}