scala实现设计模式之享元模式

package com.linewell.modeldesgin.flyweightimport scala.collection.mutable/** *  享元模式 * Created by ctao on 2015/8/29. *//** * 坐标样例类 * @param x x坐标 * @param y y坐标 */case class Coordinates(x: Int, y: Int)/** * 抽象享元类 */abstract class IgoChessman {    /**     * 获得棋子的颜色     * @return 棋子颜色     */    def color(): String    /**     * 展示方法     * @param coordinates 坐标样例类     */    def display(coordinates: Coordinates): Unit = {        /**         * 如果没有颜色就打印没有颜色         */        if (color() == "没有该颜色的棋子"){            println(color())        }else{            println("棋子颜色：" + color() + "棋子位置：" + coordinates.x + "," + coordinates.y)        }    }}/** * 黑色棋子 */object BlackIgoChessman extends IgoChessman {    override def color() = "黑色"}/** * 白色棋子 */object WhiteIgoChessman extends IgoChessman {    override def color() = "白色"}/** * 享元工厂类 */object IgoChessmanFactory {    /**     * 存放享元对象的HashMap     */    private val hm = new mutable.HashMap[String, IgoChessman] {}    /**     * 黑色棋子     */    val black: IgoChessman = BlackIgoChessman    /**     * 白色棋子     */    val white: IgoChessman = WhiteIgoChessman    hm.put("b", black)    hm.put("w", white)    /**     * 获取棋子     * @param color 颜色     * @return 棋子     */    def getIgoChessman(color: String): IgoChessman = hm.getOrElse(color, new IgoChessman {        override def color(): String = "没有该颜色的棋子"    })}
package com.linewell.modeldesgin.flyweight/** * 测试客户端 * Created by ctao on 2015/8/29. */object Client extends App {    /**     * 享元工厂     */    val factory = IgoChessmanFactory    /**     * 黑色棋子1     */    val black1 = factory.getIgoChessman("b")    /**     * 黑色棋子2     */    val black2 = factory.getIgoChessman("b")    /**     * 黑色棋子3     */    val black3 = factory.getIgoChessman("b")    black1.display(Coordinates(1, 2))    black2.display(Coordinates(1, 4))    black3.display(Coordinates(1, 3))    println("判断棋子是否相同：" + black1.eq(black2))    val white1 = factory.getIgoChessman("w")    val white2 = factory.getIgoChessman("w")    white1.display(Coordinates(0,0))    white2.display(Coordinates(1,1))    println("判断棋子是否相同：" + white1.eq(white2))    val error = factory.getIgoChessman("c")    /**     * 错误的请求     */    error.display(Coordinates(1, 0))}