/*
* The MIT License
*
* Copyright (c) 2012, Lubing Zhang.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package com.github.zhanglubing.designpattern.chainofresponsibility;
/**
* Chain of Responsibility.
*
* @author Lubing Zhang
*
*/
public abstract class Handler {
private int type;
private Handler nextHandler;
public Handler(int type) {
this.type = type;
}
public void handleRequest(Request request) {
if (this.type == request.getType()) {
this.response(request);
} else {
if (nextHandler != null) {
nextHandler.handleRequest(request);
} else {
System.out
.println("There is no handler to handle this request.");
}
}
}
public void setNext(Handler handler) {
if (handler != null && this.type <= handler.type) {
new Exception("This handler is not accept.");
}
this.nextHandler = handler;
};
public abstract void response(Request request);
}