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58 lines
3.0 KiB
58 lines
3.0 KiB
// Author: Simon Gockner
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// Created: 2020-09-18
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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 LightweightIocContainer.Exceptions;
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namespace LightweightIocContainer
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{
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/// <summary>
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/// Helper class to call a generic method without generic type parameters
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/// </summary>
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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="genericParameter">The generic parameter as <see cref="Type"/> parameter</param>
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/// <param name="bindingFlags">The <see cref="BindingFlags"/> to find the method</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, Type genericParameter, BindingFlags bindingFlags, params object?[] parameters)
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{
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MethodInfo? method = caller.GetType().GetMethod(functionName, bindingFlags);
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MethodInfo? genericMethod = method?.MakeGenericMethod(genericParameter);
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if (genericMethod == null)
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throw new GenericMethodNotFoundException(functionName);
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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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/// <summary>
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/// Call a private 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="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? CallPrivate(object caller, string functionName, Type genericParameter, params object?[] parameters) =>
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Call(caller, functionName, genericParameter, BindingFlags.NonPublic | BindingFlags.Instance, parameters);
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}
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} |