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af42ee3297
23 changed files with 348 additions and 41 deletions
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// Author: Gockner, Simon |
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// Created: 2020-11-13 |
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// Copyright(c) 2020 SimonG. All Rights Reserved. |
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using System; |
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namespace GBase.Exceptions |
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{ |
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/// <summary> |
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/// Could not find generic method |
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/// </summary> |
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internal class GenericMethodNotFoundException : Exception |
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{ |
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/// <summary> |
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/// Could not find generic method |
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/// </summary> |
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/// <param name="functionName">The name of the generic method</param> |
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public GenericMethodNotFoundException(string functionName) |
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: base($"Could not find function {functionName}") |
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{ |
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} |
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} |
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} |
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// Author: Gockner, Simon |
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// Created: 2020-11-13 |
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// Copyright(c) 2020 SimonG. All Rights Reserved. |
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using System; |
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using System.Reflection; |
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using System.Threading.Tasks; |
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using GBase.Exceptions; |
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|
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namespace GBase.Helpers |
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{ |
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internal static class GenericMethodCaller |
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{ |
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/// <summary> |
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/// Call a generic method without generic type parameters |
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/// </summary> |
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/// <param name="caller">The caller of the method</param> |
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/// <param name="functionName">The name of the method to call</param> |
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/// <param name="bindingFlags">The <see cref="BindingFlags"/> to find the method</param> |
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/// <param name="genericParameter">The generic parameter as <see cref="Type"/> parameter</param> |
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/// <param name="parameters">The parameters of the method</param> |
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/// <returns>The result of invoking the method</returns> |
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/// <exception cref="GenericMethodNotFoundException">Could not find the generic method</exception> |
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/// <exception cref="Exception">Any <see cref="Exception"/> thrown after invoking the generic method</exception> |
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public static object Call(object caller, string functionName, BindingFlags bindingFlags, Type genericParameter, params object[] parameters) => |
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GetGenericMethod(caller, functionName, bindingFlags, genericParameter).InvokeGenericMethod(caller, parameters); |
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|
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/// <summary> |
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/// Call a generic method without generic type parameters |
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/// </summary> |
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/// <param name="caller">The caller of the method</param> |
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/// <param name="functionName">The name of the method to call</param> |
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/// <param name="bindingFlags">The <see cref="BindingFlags"/> to find the method</param> |
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/// <param name="genericParameter">The generic parameter as <see cref="Type"/> parameter</param> |
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/// <param name="secondGenericParameter"></param> |
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/// <param name="parameters">The parameters of the method</param> |
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/// <returns>The result of invoking the method</returns> |
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/// <exception cref="GenericMethodNotFoundException">Could not find the generic method</exception> |
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/// <exception cref="Exception">Any <see cref="Exception"/> thrown after invoking the generic method</exception> |
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public static object Call(object caller, string functionName, BindingFlags bindingFlags, Type genericParameter, Type secondGenericParameter,params object[] parameters) => |
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GetGenericMethod(caller, functionName, bindingFlags, genericParameter, secondGenericParameter).InvokeGenericMethod(caller, parameters); |
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/// <summary> |
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/// Call a generic method asynchronously without generic type parameters |
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/// </summary> |
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/// <param name="caller">The caller of the method</param> |
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/// <param name="functionName">The name of the method to call</param> |
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/// <param name="bindingFlags">The <see cref="BindingFlags"/> to find the method</param> |
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/// <param name="genericParameter">The generic parameter as <see cref="Type"/> parameter</param> |
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/// <param name="parameters">The parameters of the method</param> |
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/// <returns>The result of invoking the method</returns> |
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/// <exception cref="GenericMethodNotFoundException">Could not find the generic method</exception> |
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/// <exception cref="Exception">Any <see cref="Exception"/> thrown after invoking the generic method</exception> |
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public static async Task<object> CallAsync(object caller, string functionName, BindingFlags bindingFlags, Type genericParameter, params object[] parameters) => |
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await GetGenericMethod(caller, functionName, bindingFlags, genericParameter).InvokeGenericMethodAsync(caller, parameters); |
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|
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/// <summary> |
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/// Call a generic method asynchronously without generic type parameters |
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/// </summary> |
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/// <param name="caller">The caller of the method</param> |
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/// <param name="functionName">The name of the method to call</param> |
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/// <param name="bindingFlags">The <see cref="BindingFlags"/> to find the method</param> |
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/// <param name="genericParameter">The generic parameter as <see cref="Type"/> parameter</param> |
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/// <param name="secondGenericParameter"></param> |
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/// <param name="parameters">The parameters of the method</param> |
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/// <returns>The result of invoking the method</returns> |
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/// <exception cref="GenericMethodNotFoundException">Could not find the generic method</exception> |
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/// <exception cref="Exception">Any <see cref="Exception"/> thrown after invoking the generic method</exception> |
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public static async Task<object> CallAsync(object caller, string functionName, BindingFlags bindingFlags, Type genericParameter, Type secondGenericParameter, params object[] parameters) => |
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await GetGenericMethod(caller, functionName, bindingFlags, genericParameter, secondGenericParameter).InvokeGenericMethodAsync(caller, parameters); |
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private static MethodInfo GetGenericMethod(object caller, string functionName, BindingFlags bindingFlags, params Type[] genericParameters) |
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{ |
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MethodInfo genericMethod = caller.GetType().GetMethod(functionName, bindingFlags)?.MakeGenericMethod(genericParameters); |
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if (genericMethod == null) |
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throw new GenericMethodNotFoundException(functionName); |
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return genericMethod; |
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} |
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private static object InvokeGenericMethod(this MethodInfo genericMethod, object caller, params object[] parameters) |
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{ |
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try //exceptions thrown by methods called with invoke are wrapped into another exception, the exception thrown by the invoked method can be returned by `Exception.GetBaseException()` |
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{ |
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return genericMethod.Invoke(caller, parameters); |
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} |
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catch (Exception ex) |
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{ |
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throw ex.GetBaseException(); |
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} |
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} |
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private static async Task<object> InvokeGenericMethodAsync(this MethodInfo genericMethod, object caller, params object[] parameters) |
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{ |
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try //exceptions thrown by methods called with invoke are wrapped into another exception, the exception thrown by the invoked method can be returned by `Exception.GetBaseException()` |
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{ |
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dynamic awaitable = genericMethod.Invoke(caller, parameters); |
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await awaitable; |
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return awaitable.GetAwaiter().GetResult(); |
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} |
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catch (Exception ex) |
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{ |
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throw ex.GetBaseException(); |
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} |
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} |
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} |
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} |
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