/**
 *這里以公司請(qǐng)假舉例：
 *1、某人請(qǐng)假（事件）
 *2、項(xiàng)目組長(zhǎng)審批：小于三天可以審批，大于三天請(qǐng)示上級(jí)
 *3、部門(mén)主管審批：小于十天可以審批，大于十天請(qǐng)示上級(jí)
 *4、總經(jīng)理審批 ：小于30天可以審批，大于30天不批準(zhǔn)
 */
public class Demo {

 public static void main(String[] args) {
 Event event = new Event("程序員", 32, "回老家探親");
 Leader a = new GroupLeader("張三");
 Leader b = new Manager("李四");
 Leader c = new GeneralManager("王五");
 
 //指定責(zé)任鏈模式
 a.setNextLeader(b);
 b.setNextLeader(c);
 
 a.handler(event);
 }
}

/**
 * 事件對(duì)象，責(zé)任鏈中的具體處理事件
 * 該實(shí)例中即為請(qǐng)假這件事兒
 */
class Event{
 private String name;
 private int days;
 private String reason;
 public Event(String name, int days, String reason) {
 super();
 this.name = name;
 this.days = days;
 this.reason = reason;
 }
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 public int getDays() {
 return days;
 }
 public void setDays(int days) {
 this.days = days;
 }
 public String getReason() {
 return reason;
 }
 public void setReason(String reason) {
 this.reason = reason;
 }
}

/**
 * 抽象責(zé)任鏈對(duì)象，后面的所有實(shí)際責(zé)任鏈對(duì)象繼承自該對(duì)象 
 */
abstract class Leader{
 private String name;
 protected Leader nextLeader;//責(zé)任鏈中的下一個(gè)責(zé)任對(duì)象，這是讓責(zé)任鏈持續(xù)下去的基礎(chǔ)
 public Leader(String name) {
 super();
 this.name = name;
 }
 public void setNextLeader(Leader nextLeader) {
 this.nextLeader = nextLeader;
 }
 
 public String getName() {
 return name;
 }
 public void setName(String name) {
 this.name = name;
 }
 protected abstract void handler(Event event);
}

/**
 * 請(qǐng)假流程中的第一個(gè)對(duì)象，組長(zhǎng)
 */
class GroupLeader extends Leader{

 public GroupLeader(String name) {
 super(name);
 }

 protected void handler(Event event) {
 if(event.getDays() < 3){
 System.out.println("--------------------請(qǐng)假條--------------------");
 System.out.print("| 請(qǐng)假人："+event.getName()+" | ");
 System.out.println("請(qǐng)假天數(shù)："+event.getDays()+"天"+" |");
 System.out.println("| 請(qǐng)假原因："+event.getReason() + " |");
 System.out.println("審批人："+this.getName()+"（組長(zhǎng)），通過(guò)！");
 System.out.println();
 }else{
 System.out.println(this.getName()+"（主管），沒(méi)有權(quán)限！");
 this.nextLeader.handler(event);
 }
 }
}

/**
 * 請(qǐng)假流程中的第二個(gè)對(duì)象，部門(mén)主管
 */
class Manager extends Leader{

 public Manager(String name) {
 super(name);
 }

 protected void handler(Event event) {
 if(event.getDays() < 10){
 System.out.println("--------------------請(qǐng)假條--------------------");
 System.out.print("| 請(qǐng)假人："+event.getName()+" | ");
 System.out.println("請(qǐng)假天數(shù)："+event.getDays()+"天"+" |");
 System.out.println("| 請(qǐng)假原因："+event.getReason() + " |");
 System.out.println("審批人："+this.getName()+"（主管），請(qǐng)假通過(guò)！");
 System.out.println();
 }else{
 System.out.println(this.getName()+"（總經(jīng)理），沒(méi)有權(quán)限！"); 
 this.nextLeader.handler(event);
 }
 }
}

/**
 * 請(qǐng)假流程中的第三個(gè)對(duì)象，總經(jīng)理
 */
class GeneralManager extends Leader{

 public GeneralManager(String name) {
 super(name);
 }

 protected void handler(Event event) {
 if(event.getDays() < 30){
 System.out.println("--------------------請(qǐng)假條--------------------");
 System.out.print("| 請(qǐng)假人："+event.getName()+" | ");
 System.out.println("請(qǐng)假天數(shù)："+event.getDays()+"天"+" |");
 System.out.println("| 請(qǐng)假原因："+event.getReason() + " |");
 System.out.println("審批人："+this.getName()+"（總經(jīng)理）");
 System.out.println();
 }else{
 System.out.println("--------------------請(qǐng)假條--------------------");
 System.out.print("| 請(qǐng)假人："+event.getName()+" | ");
 System.out.println("請(qǐng)假天數(shù)："+event.getDays()+"天"+" |");
 System.out.println("| 請(qǐng)假原因："+event.getReason() + " |");
 System.out.println("審批人："+this.getName()+"（總經(jīng)理），請(qǐng)假人不通過(guò)！");
 System.out.println();
 }
 }
}