■ 규칙 엔진을 만드는 기본적인 방법을 보여준다.
▶ User.cs
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namespace TestProject; /// <summary> /// 사용자 /// </summary> public class User { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 성명 - Name /// <summary> /// 성명 /// </summary> public string Name { get; set; } #endregion #region 나이 - Age /// <summary> /// 나이 /// </summary> public int Age { get; set; } #endregion } |
▶ Operator.cs
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using System.Reflection; namespace TestProject; /// <summary> /// 연산자 /// </summary> public static class Operator { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 함수 딕셔너리 /// </summary> private static Dictionary<string, Func<object, object, bool>> _functionDictionary; /// <summary> /// 속성 정보 딕셔너리 /// </summary> private static Dictionary<string, PropertyInfo> _propertyInfoDictionary; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Static #region 생성자 - Operator() /// <summary> /// 생성자 /// </summary> static Operator() { _functionDictionary = new Dictionary<string, Func<object, object, bool>>(); _functionDictionary["greater_than"] = new Func<object, object, bool>(ProcessOperatorGreaterThan); _functionDictionary["equal" ] = new Func<object, object, bool>(ProcessOperatorEqual); _propertyInfoDictionary = typeof(User).GetProperties().ToDictionary(propInfo => propInfo.Name); } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 적용하기 - Apply(user, opertatorName, propertyName, targetValue) /// <summary> /// 적용하기 /// </summary> /// <param name="user">사용자</param> /// <param name="opertatorName">연산자명</param> /// <param name="propertyName">속성명</param> /// <param name="targetValue">타겟 값</param> /// <returns>적용 결과</returns> public static bool Apply(User user, string opertatorName, string propertyName, object targetValue) { return _functionDictionary[opertatorName](GetPropertyValue(user, propertyName), targetValue); } #endregion //////////////////////////////////////////////////////////////////////////////// Private #region 속성 값 구하기 - GetPropertyValue(user, propertyName) /// <summary> /// 속성 값 구하기 /// </summary> /// <param name="user">사용자</param> /// <param name="propertyName">속성명</param> /// <returns>속성 값</returns> private static object GetPropertyValue(User user, string propertyName) { PropertyInfo propertyInfo = _propertyInfoDictionary[propertyName]; return propertyInfo.GetGetMethod(false).Invoke(user, null); } #endregion #region 연산자 >> 처리하기 - ProcessOperatorGreaterThan(source1, source2) /// <summary> /// 연산자 >> 처리하기 /// </summary> /// <param name="source1">소스 객체 1</param> /// <param name="source2">소스 객체 2</param> /// <returns>처리 결과</returns> private static bool ProcessOperatorGreaterThan(object source1, object source2) { if(source1 == null || source2 == null || source1.GetType() != source2.GetType() || !(source1 is IComparable)) { return false; } return (source1 as IComparable).CompareTo(source2) > 0; } #endregion #region 연산자 == 처리하기 - ProcessOperatorEqual(source1, source2) /// <summary> /// 연산자 == 처리하기 /// </summary> /// <param name="source1">소스 객체 1</param> /// <param name="source2">소스 객체 2</param> /// <returns>처리 결과</returns> private static bool ProcessOperatorEqual(object source1, object source2) { return source1 == source2; } #endregion } |
▶ Program.cs
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namespace TestProject; /// <summary> /// 프로그램 /// </summary> class Program { //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region 프로그램 시작하기 - Main() /// <summary> /// 프로그램 시작하기 /// </summary> private static void Main() { User user = new User() { Age = 16, Name = "John" }; Console.WriteLine(Operator.Apply(user, "greater_than", "Age", 15)); Console.WriteLine(Operator.Apply(user, "greater_than", "Age", 17)); Console.WriteLine(Operator.Apply(user, "equal", "Name", "John")); Console.WriteLine(Operator.Apply(user, "equal", "Name", "Bob" )); } #endregion } |
