building.java~10~

《深入浅出设计模式》的完整源代码

package securitysystem;
//大楼类,对火警采取自已的行动:
public class Building extends SecurityZone {
  public Building(String name) {
    super(name);
  }
  boolean handleNotification(int measurement, Sensor sensor) {
       return false;
  }
  void fireAlarm(SecurityZone zone,Sensor sensor) {
    if (zone instanceof Area) {
        // Turn on sprinklers in surrounding areas
        // Don't call super.fireAlarm because that will turn on the
        // sprinkler for the whole warehouse.
        System.out.println(this.name+"栋大楼发生火警");
        if (getParent() != null)
          getParent().fireAlarm(zone,sensor);
        return;
    } // if
    super.fireAlarm(zone,sensor);
}

}