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// **********************************************************************
//
// Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
namespace IceInternal
{
using System;
using System.Collections;
using System.Diagnostics;
using System.Reflection;
using System.Threading;
public sealed class AssemblyUtil
{
public enum Runtime { DotNET, Mono };
public enum Platform { Windows, NonWindows };
static AssemblyUtil()
{
PlatformID id = Environment.OSVersion.Platform;
if( id == PlatformID.Win32NT
|| id == PlatformID.Win32S
|| id == PlatformID.Win32Windows
|| id == PlatformID.WinCE)
{
platform_ = Platform.Windows;
}
else
{
platform_ = Platform.NonWindows;
}
if(System.Type.GetType("Mono.Runtime") != null)
{
runtime_ = Runtime.Mono;
}
else
{
runtime_ = Runtime.DotNET;
}
System.Version v = System.Environment.Version;
runtimeMajor_ = v.Major;
runtimeMinor_ = v.Minor;
runtimeBuild_ = v.Build;
runtimeRevision_ = v.Revision;
}
public static Type findType(string csharpId)
{
loadAssemblies(); // Lazy initialization
lock(_mutex)
{
Type t = (Type)_typeTable[csharpId];
if(t != null)
{
return t;
}
foreach(Assembly a in _loadedAssemblies.Values)
{
if((t = a.GetType(csharpId)) != null)
{
_typeTable[csharpId] = t;
return t;
}
}
}
return null;
}
public static Type[] findTypesWithPrefix(string prefix)
{
IceUtil.LinkedList l = new IceUtil.LinkedList();
loadAssemblies(); // Lazy initialization
lock(_mutex)
{
foreach(Assembly a in _loadedAssemblies.Values)
{
Type[] types = a.GetTypes();
foreach(Type t in types)
{
if(t.AssemblyQualifiedName.IndexOf(prefix) == 0)
{
l.Add(t);
}
}
}
}
Type[] result = new Type[l.Count];
if(l.Count > 0)
{
l.CopyTo(result, 0);
}
return result;
}
public static object createInstance(Type t)
{
ConstructorInfo[] constructors = t.GetConstructors();
if(constructors.Length == 0)
{
return null;
}
ParameterInfo[] firstConstructor = constructors[0].GetParameters();
int paramCount = firstConstructor.Length;
Type[] constructor = new Type[paramCount];
for(int i = 0; i < paramCount; i++)
{
constructor[i] = firstConstructor[i].ParameterType;
}
return t.GetConstructor(constructor).Invoke(new object[]{});
}
//
// Make sure that all assemblies that are referenced by this process
// are actually loaded. This is necessary so we can use reflection
// on any type in any assembly (because the type we are after will
// most likely not be in the current assembly and, worse, may be
// in an assembly that has not been loaded yet. (Type.GetType()
// is no good because it looks only in the calling object's assembly
// and mscorlib.dll.)
//
private static void loadAssemblies()
{
lock(_mutex)
{
if(!_assembliesLoaded)
{
Assembly[] assemblies = AppDomain.CurrentDomain.GetAssemblies();
foreach(Assembly a in assemblies)
{
_loadedAssemblies[a.FullName] = a;
}
foreach(Assembly a in assemblies)
{
loadReferencedAssemblies(a);
}
_assembliesLoaded = true;
}
}
}
private static void loadReferencedAssemblies(Assembly a)
{
AssemblyName[] names = a.GetReferencedAssemblies();
foreach(AssemblyName name in names)
{
if(!_loadedAssemblies.Contains(name.FullName))
{
Assembly ra = Assembly.Load(name);
_loadedAssemblies[ra.FullName] = ra;
loadReferencedAssemblies(ra);
}
}
}
private static bool _assembliesLoaded = false;
private static Hashtable _loadedAssemblies = new Hashtable(); // <string, Assembly> pairs.
private static Hashtable _typeTable = new Hashtable(); // <type name, Type> pairs.
private static Mutex _mutex = new Mutex();
public readonly static Runtime runtime_; // Either DotNET or Mono
//
// Versioning is: Major.Minor.Build.Revision. (Yes, really. It is not Major.Minor.Revision.Build, as
// one might expect.) If a part of a version number (such as revision) is not defined, it is -1.
//
public readonly static int runtimeMajor_;
public readonly static int runtimeMinor_;
public readonly static int runtimeBuild_;
public readonly static int runtimeRevision_;
public readonly static Platform platform_;
}
}
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