mirror of https://github.com/sbrl/PolyFeed.git
92 lines
2.8 KiB
C#
92 lines
2.8 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Reflection;
|
|
using System.Linq;
|
|
using System.IO;
|
|
|
|
namespace PolyFeed.Helpers
|
|
{
|
|
internal static class ReflectionUtilities
|
|
{
|
|
public static bool Verbose = true;
|
|
|
|
public static IEnumerable<Assembly> IterateLoadedAssemblies()
|
|
{
|
|
return AppDomain.CurrentDomain.GetAssemblies();
|
|
}
|
|
|
|
public static IEnumerable<Type> IterateAllLoadedTypes()
|
|
{
|
|
return IterateLoadedAssemblies()
|
|
.SelectMany((Assembly nextAssembly) => nextAssembly.GetTypes());
|
|
}
|
|
|
|
public static IEnumerable<Type> IterateLoadedTypes(Assembly targetAssembly)
|
|
{
|
|
return targetAssembly.GetTypes();
|
|
}
|
|
|
|
public static void LoadAssembliesDirectory(string directory)
|
|
{
|
|
foreach (string nextDll in Directory.EnumerateFiles(directory, "*.dll"))
|
|
{
|
|
AssemblyName assemblyName = AssemblyName.GetAssemblyName(nextDll);
|
|
|
|
// Check that a strongname is actually present
|
|
if (assemblyName.GetPublicKeyToken().Length < 8)
|
|
continue;
|
|
|
|
// Verify the strongname is valid.
|
|
/*try
|
|
{
|
|
bool isOk = false;
|
|
NativeMethods.StrongNameSignatureVerificationEx(nextDll, 0xFF, ref isOk);
|
|
if (!isOk)
|
|
continue;
|
|
}
|
|
catch (DllNotFoundException error)
|
|
{
|
|
Console.Error.WriteLine($"Warning: Unable to verify the integrity of the StrongName for '{nextDll}' (DLL not found: {error.Message}).");
|
|
}*/
|
|
|
|
try
|
|
{
|
|
Assembly.LoadFrom(nextDll);
|
|
// FUTURE: Consider using Assembly.ReflectionOnlyLoadFrom in a separate AppDomain to figure out if there's anything useful in an assembly before loading it for reals
|
|
}
|
|
catch (BadImageFormatException error)
|
|
{
|
|
if (Verbose) Console.Error.WriteLine($"Error loading '{nextDll}': {error.Message}");
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
/// Searches the types present in the specified assembly to find a type that implements
|
|
/// the specified interface.
|
|
/// </summary>
|
|
/// <param name="targetInterface">The target interface that returned types should implement.</param>
|
|
/// <param name="assemblyToSearch">The assembly to search through for matching types.</param>
|
|
public static IEnumerable<Type> IterateImplementingTypes(Type targetInterface, Assembly assemblyToSearch)
|
|
{
|
|
if (!targetInterface.IsInterface)
|
|
throw new ArgumentException($"Error: The specified type {targetInterface} is not an " +
|
|
"interface, so it can't be used to search for implementing types.");
|
|
|
|
// FUTURE: Add caching here? Reflection is slow
|
|
foreach (Type nextType in IterateAllLoadedTypes())
|
|
{
|
|
// Interfaces implement themselves, but we don't want to return the interface itself
|
|
if (nextType == targetInterface)
|
|
continue;
|
|
|
|
// Make sure it implements the specified interface
|
|
if (!targetInterface.IsAssignableFrom(nextType))
|
|
continue;
|
|
|
|
yield return nextType;
|
|
}
|
|
}
|
|
}
|
|
} |