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Posted

Who cares about Domain Rules?

, 20 Nov 2006 MIT
With this article, I am evolving a domain problem towards the best possible solution.
domainrules_src.zip
BusinessRules
0 - Procedural_Way
0 - Procedural_Way.smp
ProceduralWay.cd
Tests
1 - Evolution One
1 - Evolution One.smp
EvolutionOne.cd
Tests
2 - Evolution Two
2 - Evolution Two.smp
EvolutionTwo.cd
Tests
3 - Evolution Three
3 - Evolution Three.smp
EvolutionThree.cd
IncomeTaxEngine.cd
Tests
4 - Evolution Four
4 - Evolution Four.smp
EvolutionFour.cd
Tests
5 - Evolution Five
5 - Evolution Five.smp
EvolutionFive.cd
TaxBandGenerator.cd
Tests
bin
Debug
BusinessRules.dll
BusinessRules.dll.lastcodeanalysissucceeded
NMock2.dll
BusinessRules.csproj.user
obj
Debug
BusinessRules.dll
TempPE
Properties
Tools
NMock2.dll
nunit.framework.dll
using System;
using System.Collections.Generic;

namespace BusinessRules.Evolution_Five
{
    /// <summary>
    /// Abstract tax band generator object.
    /// </summary>
    public abstract class TaxBandGenerator : ITaxBandGenerator
    {
        #region Factory Method

        /// <summary>
        /// Creates the specific instance of the tax band generator object 
        /// dependant on the current culture.
        /// </summary>
        /// <returns>Returns a specific tax band generator domain object 
        /// of the country associated with the culture.</returns>
        public static ITaxBandGenerator CreateInstance()
        {
            return CreateInstance(new CurrentCultureInfo());
        }

        /// <summary>
        /// Creates the specific instance of the tax band generator object 
        /// dependant on the current culture.
        /// </summary>
        /// <param name="cultureInfo">An instance of the current culture info.</param>
        /// <returns>Returns a specific tax band generator domain object 
        /// of the country associated with the culture.</returns>
        public static ITaxBandGenerator CreateInstance(ICurrentCultureInfo cultureInfo)
        {
            switch (cultureInfo.CurrentCultureName)
            {
                case "en-NZ":
                    return new NewZealandTaxBandGenerator();
                case "en-AU":
                    return new AustralianTaxBandGenerator();
                case "en-US":
                    return new UsaTaxBandGenerator();
                default:
                    return new NullTaxBandGenerator();
            }
        }

        #endregion

        #region Abstract Method

        /// <summary>
        /// Creates the tax bands.
        /// </summary>
        /// <remarks>Factory Method that constructs the tax band collection.</remarks>
        public abstract List<TaxBand> CreateTaxBands();

        #endregion
    }
}

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This article, along with any associated source code and files, is licensed under The MIT License

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About the Author

Maruis Marais
Web Developer
New Zealand New Zealand
No Biography provided

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