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//
// ReflectionFu.cs
//
// Copyright (C) 2004-2006 Novell, Inc.
//
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.IO;
using System.Reflection;
namespace Beagle.Util {
public class ReflectionFu {
public delegate void ForeachDirMethod (Assembly a);
static public ArrayList ScanEnvironmentForAssemblies (string env_var, string fallback_path)
{
return ScanEnvironmentForAssemblies (env_var, fallback_path, null);
}
static public ArrayList ScanEnvironmentForAssemblies (string env_var, string fallback_path, ForeachDirMethod method)
{
ArrayList assemblies = new ArrayList ();
string path = Environment.GetEnvironmentVariable (env_var);
if (path == null || path == "")
path = fallback_path;
else if (path [path.Length-1] == ':')
path += fallback_path;
Hashtable seen = new Hashtable ();
foreach (string dir in path.Split (':')) {
if (! seen.Contains (dir)) {
foreach (Assembly a in ScanDirectoryForAssemblies (dir)) {
assemblies.Add (a);
if (method != null)
method (a);
}
}
seen [dir] = true;
}
return assemblies;
}
static public ArrayList ScanDirectoryForAssemblies (string dir)
{
ArrayList assemblies = new ArrayList ();
if (dir == null || dir == "")
return assemblies;
if (! Directory.Exists (dir)) {
Logger.Log.Debug ("'{0}' is not a directory: Nothing loaded from here", dir);
return assemblies;
}
DirectoryInfo dir_info = new DirectoryInfo (dir);
foreach (FileInfo file_info in dir_info.GetFiles ()) {
if (file_info.Extension == ".dll") {
Assembly a = Assembly.LoadFrom (file_info.FullName);
assemblies.Add (a);
}
}
return assemblies;
}
static public ArrayList GetTypesFromAssemblyAttribute (Assembly assembly, Type attr_type)
{
ArrayList types = new ArrayList ();
TypeCacheAttribute attr = (TypeCacheAttribute) Attribute.GetCustomAttribute (assembly, attr_type);
if (attr != null)
types.AddRange (attr.Types);
return types;
}
static public ArrayList ScanTypeForAttribute (Type type, Type attribute_type)
{
ArrayList attrs = new ArrayList ();
object[] attributes = Attribute.GetCustomAttributes (type);
foreach (object obj in attributes) {
Type obj_type = obj.GetType ();
if (obj_type == attribute_type || obj_type.IsSubclassOf (attribute_type))
attrs.Add (obj);
}
return attrs;
}
}
}
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