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AssemblyUtils.cs
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127 lines (112 loc) · 4.26 KB
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text.RegularExpressions;
using System.Threading;
using ServiceStack.Common.Support;
namespace ServiceStack.Text
{
/// <summary>
/// Utils to load types
/// </summary>
public static class AssemblyUtils
{
private const string FileUri = "file:///";
private const char UriSeperator = '/';
private static Dictionary<string, Type> TypeCache = new Dictionary<string, Type>();
/// <summary>
/// Find the type from the name supplied
/// </summary>
/// <param name="typeName">[typeName] or [typeName, assemblyName]</param>
/// <returns></returns>
public static Type FindType(string typeName)
{
Type type = null;
if (TypeCache.TryGetValue(typeName, out type)) return type;
type = Type.GetType(typeName);
if (type == null)
{
var typeDef = new AssemblyTypeDefinition(typeName);
type = !string.IsNullOrEmpty(typeDef.AssemblyName)
? FindType(typeDef.TypeName, typeDef.AssemblyName)
: FindTypeFromLoadedAssemblies(typeDef.TypeName);
}
Dictionary<string, Type> snapshot, newCache;
do
{
snapshot = TypeCache;
newCache = new Dictionary<string, Type>(TypeCache) { [typeName] = type };
} while (!ReferenceEquals(
Interlocked.CompareExchange(ref TypeCache, newCache, snapshot), snapshot));
return type;
}
/// <summary>
/// The top-most interface of the given type, if any.
/// </summary>
public static Type MainInterface<T>()
{
var t = typeof(T);
if (t.BaseType == typeof(object))
{
// on Windows, this can be just "t.GetInterfaces()" but Mono doesn't return in order.
var interfaceType = t.GetInterfaces().FirstOrDefault(i => !t.GetInterfaces().Any(i2 => i2.GetInterfaces().Contains(i)));
if (interfaceType != null) return interfaceType;
}
return t; // not safe to use interface, as it might be a superclass's one.
}
/// <summary>
/// Find type if it exists
/// </summary>
/// <param name="typeName"></param>
/// <param name="assemblyName"></param>
/// <returns>The type if it exists</returns>
public static Type FindType(string typeName, string assemblyName)
{
var type = FindTypeFromLoadedAssemblies(typeName);
if (type != null)
{
return type;
}
return PclExport.Instance.FindType(typeName, assemblyName);
}
public static Type FindTypeFromLoadedAssemblies(string typeName)
{
var assemblies = PclExport.Instance.GetAllAssemblies();
foreach (var assembly in assemblies)
{
var type = assembly.GetType(typeName);
if (type != null)
{
return type;
}
}
return null;
}
public static Assembly LoadAssembly(string assemblyPath)
{
return PclExport.Instance.LoadAssembly(assemblyPath);
}
public static string GetAssemblyBinPath(Assembly assembly)
{
var codeBase = PclExport.Instance.GetAssemblyCodeBase(assembly);
var binPathPos = codeBase.LastIndexOf(UriSeperator);
var assemblyPath = codeBase.Substring(0, binPathPos + 1);
if (assemblyPath.StartsWith(FileUri, StringComparison.OrdinalIgnoreCase))
{
assemblyPath = assemblyPath.Remove(0, FileUri.Length);
}
return assemblyPath;
}
static readonly Regex versionRegEx = new Regex(", Version=[^\\]]+", PclExport.Instance.RegexOptions);
public static string ToTypeString(this Type type)
{
return versionRegEx.Replace(type.AssemblyQualifiedName, "");
}
public static string WriteType(Type type)
{
return type.ToTypeString();
}
}
}