《Java极简设计模式》第13章：责任链模式(COR)

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description Request
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public interface Request {
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description AddMoneyRequest
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class AddMoneyRequest implements Request {
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description DimissionRequest
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class DimissionRequest implements Request{
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description LeaveRequest
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class LeaveRequest implements Request {
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description Handler
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public interface RequestHandler {

    void handleRequest(Request request);
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description HRRequestHandle
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class HRRequestHandler implements RequestHandler {
    @Override
    public void handleRequest(Request request) {
        if (request instanceof DimissionRequest) {
            System.out.println("要离职, 人事审批!");
        }
        System.out.println("请求完毕");
    }
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description PMRequestHandle
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class PMRequestHandler implements RequestHandler {
    private RequestHandler rh;
    public PMRequestHandler(RequestHandler rh) {
        this.rh = rh;
    }
    @Override
    public void handleRequest(Request request) {
        if (request instanceof AddMoneyRequest) {
            System.out.println("要加薪, 项目经理审批!");
        } else {
            rh.handleRequest(request);
        }
    }
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description TLRequestHandle
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class TLRequestHandler implements RequestHandler {

    private RequestHandler rh;
    public TLRequestHandler(RequestHandler rh) {
        this.rh = rh;
    }

    public void handleRequest(Request request) {
        if (request instanceof LeaveRequest) {
            System.out.println("要请假, 项目组长审批!");
        } else {
            rh.handleRequest(request);
        }
    }
}

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description 测试类
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class Test {

    public static void main(String[] args) {
        RequestHandler hr = new HRRequestHandler();
        RequestHandler pm = new PMRequestHandler(hr);
        RequestHandler tl = new TLRequestHandler(pm);

        //team leader处理离职请求
        Request request = new LeaveRequest();
        tl.handleRequest(request);

        System.out.println("===========");
        //team leader处理加薪请求
        request = new AddMoneyRequest();
        tl.handleRequest(request);

        System.out.println("========");
        //项目经理上理辞职请求
        request = new DimissionRequest();
        pm.handleRequest(request);
    }
}