/// <summary> /// 初始化方法字典。 /// </summary> /// <param name="methods">方法列表。</param> private void InitMethods(Delegate[] methods) { methodDict = new Dictionary <Type, TDelegate>(methods.Length); for (int i = 0; i < methods.Length; i++) { if (methods[i] == null) { throw CommonExceptions.ArgumentNull("methods[" + i + "]"); } TDelegate dlg = methods[i].Wrap <TDelegate>(); if (dlg == null) { throw CommonExceptions.DelegateCompatible("methods[" + i + "]", typeof(TDelegate)); } methodDict.Add(methods[i].GetType().GetMethod("Invoke").GetParameters()[keyIndex].ParameterType, dlg); } }
/// <summary> /// 检查委托类型是否与处理器兼容。 /// </summary> /// <typeparam name="TDelegate">调用委托的类型。</typeparam> /// <param name="data">处理器的数据。</param> /// <exception cref="ArgumentException">委托类型与处理器不匹配。</exception> private static void CheckDelegateType <TDelegate>(ProcessorData data) { Contract.Requires(data != null); Type dlgType = typeof(TDelegate); if (data.IsStatic) { if (data.DelegateType != dlgType) { // 检查静态委托参数。 ParameterInfo[] paramInfos = data.DelegateType.GetMethod("Invoke").GetParametersNoCopy(); ParameterInfo[] dlgParamInfos = dlgType.GetMethod("Invoke").GetParametersNoCopy(); if (paramInfos.Length != dlgParamInfos.Length) { throw CommonExceptions.DelegateCompatible(data.DelegateType, dlgType); } if (paramInfos.Where((param, idx) => !param.ParameterType.IsExplicitFrom(dlgParamInfos[idx].ParameterType)) .Any()) { throw CommonExceptions.DelegateCompatible(data.DelegateType, dlgType); } } } else { // 检查实例委托参数,要考虑实例对应的参数。 ParameterInfo[] paramInfos = data.DelegateType.GetMethod("Invoke").GetParametersNoCopy(); ParameterInfo[] dlgParamInfos = dlgType.GetMethod("Invoke").GetParametersNoCopy(); if (paramInfos.Length != dlgParamInfos.Length + 1) { throw CommonExceptions.DelegateCompatible(data.DelegateType, dlgType); } for (int i = 1; i < paramInfos.Length; i++) { if (!paramInfos[i].ParameterType.IsExplicitFrom(dlgParamInfos[i - 1].ParameterType)) { throw CommonExceptions.DelegateCompatible(data.DelegateType, dlgType); } } } }
/// <summary> /// 返回与指定标识符相关的处理器方法集合。 /// </summary> /// <typeparam name="TDelegate">使用基类型调用方法的委托。</typeparam> /// <param name="type">在其中查找静态或实例方法的类型。</param> /// <param name="id">方法切换器的标识符。</param> /// <param name="index">方法的关键参数索引。</param> /// <param name="queryStatic">是否请求的是静态方法。</param> /// <returns>与指定标识符相关的处理器方法集合。</returns> private static Dictionary <Type, Delegate> GetMethods <TDelegate>(Type type, string id, int index, bool queryStatic) { Type dlgType = typeof(TDelegate); Tuple <bool, Type, Dictionary <Type, Delegate> > data; string key = string.Concat(type.FullName, "_", id); if (!methodDict.TryGetValue(key, out data)) { MethodInfo[] methods = type.GetMethods(MethodFlags); List <MethodInfo> list = new List <MethodInfo>(); for (int i = 0; i < methods.Length; i++) { if (methods[i].GetCustomAttributes(typeof(ProcessorAttribute), true) .Cast <ProcessorAttribute>().Any(s => s.Id == id)) { list.Add(methods[i]); } } int cnt = list.Count; if (cnt == 0) { throw CommonExceptions.ProcessorNotFound("type", type, id); } bool isStatic = list[0].IsStatic; for (int i = 1; i < cnt; i++) { if (list[i].IsStatic != isStatic) { throw CommonExceptions.ProcessorMixed("type", type, id); } } Dictionary <Type, Delegate> dict = new Dictionary <Type, Delegate>(); Type newDlgType = dlgType; if (!isStatic) { newDlgType = GetInstanceDlgType(newDlgType); } for (int i = 0; i < cnt; i++) { Type keyType = list[i].GetParameters()[index].ParameterType; Delegate dlg = DelegateBuilder.CreateDelegate(newDlgType, list[i], false); if (dlg == null) { throw CommonExceptions.DelegateCompatible(list[i].ToString(), dlgType); } dict.Add(keyType, dlg); } data = new Tuple <bool, Type, Dictionary <Type, Delegate> >(isStatic, dlgType, dict); methodDict.Add(key, data); } if (data.Item1 != queryStatic) { throw CommonExceptions.ProcessorMismatch("type", type, id); } if (data.Item2 != dlgType) { // 检查委托参数。 ParameterInfo[] paramInfos = data.Item2.GetMethod("Invoke").GetParameters(); ParameterInfo[] dlgParamInfos = dlgType.GetMethod("Invoke").GetParameters(); if (paramInfos.Length != dlgParamInfos.Length) { throw CommonExceptions.DelegateCompatible("TDelegate", dlgType); } for (int i = 0; i < paramInfos.Length; i++) { if (paramInfos[i].ParameterType != dlgParamInfos[i].ParameterType) { throw CommonExceptions.DelegateCompatible("TDelegate", dlgType); } } } return(data.Item3); }