/* * The MIT License * Copyright © 2014-2019 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.parameter.object; public class SearchService { /** * Below two methods of name `search` is overloaded so that we can send a default value for * one of the criteria and call the final api. A default SortOrder is sent in the first method * and a default SortBy is sent in the second method. So two separate method definitions are * needed for having default values for one argument in each case. Hence multiple overloaded * methods are needed as the number of argument increases. */ public String search(String type, String sortBy) { return getQuerySummary(type, sortBy, SortOrder.ASC); } public String search(String type, SortOrder sortOrder) { return getQuerySummary(type, "price", sortOrder); } /** * The need for multiple method definitions can be avoided by the Parameter Object pattern. * Below is the example where only one method is required and all the logic for having default * values are abstracted into the Parameter Object at the time of object creation. */ public String search(ParameterObject parameterObject) { return getQuerySummary(parameterObject.getType(), parameterObject.getSortBy(), parameterObject.getSortOrder()); } private String getQuerySummary(String type, String sortBy, SortOrder sortOrder) { return String.format("Requesting shoes of type \"%s\" sorted by \"%s\" in \"%sending\" order..", type, sortBy, sortOrder.getValue()); } }