Stock.java

package com.cheng.zenofdesignpatterns.patterns.mediator.invoicing;

/**
 * 具体同事类
 * 存货
 */
public class Stock extends AbstractColleague {

    // 刚开始有100台电脑
    private static int COMPUTER_NUMBER = 100;

    public Stock(AbstractMediator _mediator) {
        super(_mediator);
    }

    // 库存增加
    public void increase(int number) {
        COMPUTER_NUMBER = COMPUTER_NUMBER + number;
        System.out.println("库存数量为："+COMPUTER_NUMBER);
    }

    // 库存降低
    public void decrease(int number) {
        COMPUTER_NUMBER = COMPUTER_NUMBER - number;
        System.out.println("库存数量为："+COMPUTER_NUMBER);
    }

    // 获得库存数量
    public int getStockNumber() {
        return COMPUTER_NUMBER;
    }

    // 存货压力大了，就要通知采购人员不要采购，销售人员要尽快销售
    public void clearStock() {
        System.out.println("清理存货数量为："+COMPUTER_NUMBER);
        super.mediator.execute("stock.clear");
    }
}