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Commit 2dad45d

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chainofResponsibility pattern example
1 parent 0079eef commit 2dad45d

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3 files changed

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3 files changed

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>netcoreapp2.0</TargetFramework>
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</PropertyGroup>
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</Project>

‎ChainOfResponsibilityPattern/Program.cs

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using System;
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namespace ChainOfResponsibilityPattern
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{
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abstract class Account
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{
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private Account mSuccessor;
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protected decimal mBalance;
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public void SetNext(Account account)
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{
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mSuccessor = account;
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}
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public void Pay(decimal amountTopay)
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{
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if (CanPay(amountTopay))
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{
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Console.WriteLine("Paid {0:c} using {1}.", amountTopay, this.GetType().Name);
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}
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else if (this.mSuccessor != null)
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{
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Console.WriteLine("Cannot pay using {0}. Proceeding..", this.GetType().Name);
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mSuccessor.Pay(amountTopay);
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}
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else
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{
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throw new Exception("None of the accounts have enough balance");
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}
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}
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private bool CanPay(decimal amount)
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{
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return mBalance >= amount ? true : false;
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}
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}
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class Bank : Account
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{
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public Bank(decimal balance)
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{
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this.mBalance = balance;
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}
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}
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class Paypal : Account
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{
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public Paypal(decimal balance)
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{
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this.mBalance = balance;
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}
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}
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class Bitcoin : Account
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{
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public Bitcoin(decimal balance)
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{
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this.mBalance = balance;
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}
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}
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class Program
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{
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static void Main(string[] args)
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{
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// Let's prepare a chain like below
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// $bank->$paypal->$bitcoin
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//
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// First priority bank
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// If bank can't pay then paypal
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// If paypal can't pay then bit coin
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var bank = new Bank(100); // Bank with balance 100
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var paypal = new Paypal(200); // Paypal with balance 200
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var bitcoin = new Bitcoin(300); // Bitcoin with balance 300
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bank.SetNext(paypal);
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paypal.SetNext(bitcoin);
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// Let's try to pay using the first priority i.e. bank
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bank.Pay(259);
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// Output will be
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// ==============
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// Cannot pay using bank. Proceeding ..
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// Cannot pay using paypal. Proceeding ..:
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// Paid 259 using Bitcoin!
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Console.ReadLine();
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}
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}
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}

‎DesignPatterns.sln

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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ProxyPattern", "ProxyPattern\ProxyPattern.csproj", "{CE4E3751-C4D9-440E-9E25-3E7EA61F4A7D}"
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EndProject
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Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ChainOfResponsibilityPattern", "ChainOfResponsibilityPattern\ChainOfResponsibilityPattern.csproj", "{E94F9FB8-B495-4A85-BAB4-0B08C69BA2D9}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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{CE4E3751-C4D9-440E-9E25-3E7EA61F4A7D}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{CE4E3751-C4D9-440E-9E25-3E7EA61F4A7D}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{CE4E3751-C4D9-440E-9E25-3E7EA61F4A7D}.Release|Any CPU.Build.0 = Release|Any CPU
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{E94F9FB8-B495-4A85-BAB4-0B08C69BA2D9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{E94F9FB8-B495-4A85-BAB4-0B08C69BA2D9}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{E94F9FB8-B495-4A85-BAB4-0B08C69BA2D9}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{E94F9FB8-B495-4A85-BAB4-0B08C69BA2D9}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE

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