/// <summary>
/// Resolves the supplied <paramref name="typeName"/> to a
/// <see cref="System.Type"/> instance.
/// </summary>
/// <param name="typeName">
/// The unresolved (possibly partially assembly qualified) name
/// of a <see cref="System.Type"/>.
/// </param>
/// <returns>
/// A resolved <see cref="System.Type"/> instance.
/// </returns>
/// <exception cref="System.TypeLoadException">
/// If the supplied <paramref name="typeName"/> could not be resolved
/// to a <see cref="System.Type"/>.
/// </exception>
public virtual Type Resolve(string typeName)
{
if (string.IsNullOrEmpty(typeName))
throw BuildTypeLoadException(typeName);
var typeInfo = new TypeAssemblyHolder(typeName);
Type type;
try
{
type = (typeInfo.IsAssemblyQualified) ?
LoadTypeDirectlyFromAssembly(typeInfo) :
LoadTypeByIteratingOverAllLoadedAssemblies(typeInfo);
}
catch
{
try
{
type = LoadTypeByIteratingOverAllLoadedAssemblies(typeInfo);
}
catch (Exception ex)
{
if (ex is TypeLoadException)
throw;
throw BuildTypeLoadException(typeName, ex);
}
}
return type;
}
public void CanTakeUnqualifiedType()
{
var testType = typeof (Category);
var typeAssemblyHolder = new TypeAssemblyHolder(testType.FullName);
Assert.IsFalse(typeAssemblyHolder.IsAssemblyQualified);
Assert.AreEqual(testType.FullName, typeAssemblyHolder.GetTypeName());
Assert.AreEqual(null, typeAssemblyHolder.GetAssemblyName());
}
public void CanTakeUnqualifiedGenericType()
{
var testType = typeof (TestGenericObject<int, string>);
var tah = new TypeAssemblyHolder(testType.FullName);
Assert.IsFalse(tah.IsAssemblyQualified);
Assert.AreEqual(testType.FullName, tah.GetTypeName());
Assert.AreEqual(null, tah.GetAssemblyName());
}
private static Type LoadTypeDirectlyFromAssembly(TypeAssemblyHolder typeInfo)
{
Type type = null;
var assembly = Assembly.Load(typeInfo.GetAssemblyName());
if (assembly != null)
type = assembly.GetType(typeInfo.GetTypeName(), true, true);
return type;
}
private static Type LoadTypeByIteratingOverAllLoadedAssemblies(TypeAssemblyHolder typeInfo)
{
Type type = null;
var assemblies = AppDomain.CurrentDomain.GetAssemblies();
foreach (var assembly in assemblies)
{
type = assembly.GetType(typeInfo.GetTypeName(), false, false);
if (type != null)
break;
}
return type;
}
private static Type LoadTypeDirectlyFromAssembly(TypeAssemblyHolder typeInfo)
{
Type type = null;
var assembly = Assembly.Load(typeInfo.GetAssemblyName());
if (assembly != null)
{
type = assembly.GetType(typeInfo.GetTypeName(), true, true);
}
return(type);
}
private static Type LoadTypeByIteratingOverAllLoadedAssemblies(TypeAssemblyHolder typeInfo)
{
Type type = null;
var assemblies = AppDomain.CurrentDomain.GetAssemblies();
foreach (var assembly in assemblies)
{
type = assembly.GetType(typeInfo.GetTypeName(), false, false);
if (type != null)
{
break;
}
}
return(type);
}
