/** * The MIT License * Copyright (c) 2014-2016 Ilkka Seppälä * * 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.iluwatar.delegation.simple; /** * Delegator Class to delegate the implementation of the Printer. * This ensures two things: * - when the actual implementation of the Printer class changes the delegation will still be operational * - the actual benefit is observed when there are more than one implementors and they share a delegation control */ public class PrinterController implements Printer { private final Printer printer; public PrinterController(Printer printer) { this.printer = printer; } /** * This method is implemented from {@link Printer} however instead on providing an * implementation, it instead calls upon the class passed through the constructor. This is the delegate, * hence the pattern. Therefore meaning that the caller does not care of the implementing class only the owning * controller. * * @param message to be printed to the screen */ @Override public void print(String message) { printer.print(message); } }