/// <summary>This is a helper method for the caller's benefit. It flattens the tree.
/// http://stackoverflow.com/questions/1938409/linq-how-to-convert-the-nested-hierarchical-object-to-flatten-object
/// </summary>
/// <param name="parent"></param>
/// <returns></returns>
private static IEnumerable<AssemblynameNode> Flatten(AssemblynameNode parent)
{
yield return parent;
foreach (AssemblynameNode child in
parent.ReferencedAssemblyNames ?? new List<AssemblynameNode>()
)
{
foreach (AssemblynameNode relative in Flatten(child))
{
yield return relative;
}
}
}
/// <summary>This is a helper method for the caller's benefit. It flattens the tree.
/// http://stackoverflow.com/questions/1938409/linq-how-to-convert-the-nested-hierarchical-object-to-flatten-object
/// </summary>
/// <param name="parent"></param>
/// <returns></returns>
private static IEnumerable <AssemblynameNode> Flatten(AssemblynameNode parent)
{
yield return(parent);
foreach (AssemblynameNode child in
parent.ReferencedAssemblyNames ?? new List <AssemblynameNode>()
)
{
foreach (AssemblynameNode relative in Flatten(child))
{
yield return(relative);
}
}
}
/// <summary>This is the method for recursing through the AssemblyNames.
/// It returns a tree of AssemblyNames.
/// </summary>
/// <param name="assembly"></param>
/// <returns></returns>
private static AssemblynameNode GetRecursive(Assembly assembly)
{
if (null == assembly)
{
throw new System.ArgumentNullException("assembly");
}
// http://msdn.microsoft.com/en-us/magazine/cc163641.aspx <- reflection
// http://dotnetdebug.net/2005/11/15/net-assembly-loader/
// http://stackoverflow.com/questions/3971793/what-when-assembly-getreferencedassemblies-returns-exe-dependency <- reflectiononlyload and ditto loadfrom. solves which problem?
// We always have an AssemblyName to return.
var ret = new AssemblynameNode(assembly.GetName());
// Loop through the AssemblyNames the actual Assembly references. Note that we might have already been into the AssemblyName through
// another Assembly and then we have a circular reference which means stack overflow. It is taken care of in the loop.
foreach (var assemblyname in assembly.GetReferencedAssemblies())
{
// We only want to set the Info to have a list if we are sure we have referenced assemblies. If we don't have any referenced assemblies we will keep it as null.
// If we are in the loop we know there are references Assemblies. Below is shorthand for making sure we have a List and not touch it if we already have a List.
ret.ReferencedAssemblyNames = ret.ReferencedAssemblyNames ?? new List <AssemblynameNode>();
// Check if we alreay have found this Assemblyname. If we have; add it as a node but don't recurse its siblings.
if (_assemblynameList.ContainsKey(assemblyname.FullName))
{
ret.ReferencedAssemblyNames.Add(new AssemblynameNode(assemblyname));
}
else
{ // The AssemblyName is new for us.
// Add the AssemblyName to the list of AssemblyNames we have found.
_assemblynameList.Add(assemblyname.FullName, assemblyname);
// Gotta load the Assembly to get its references. Just AssemblyName won't do since AssemblyName doesn't have information about referenced Assemblies.
{
var ass = Assembly.Load(assemblyname.FullName);
ret.ReferencedAssemblyNames.Add(GetRecursive(ass));
// ReSharper disable RedundantAssignment
ass = null; // How do I unload? Can I? Should I?
// ReSharper restore RedundantAssignment
// Well... we can't unload in the default app domain. We should create a new, temporary, app domain and load/unload it there.
// Not being able to unload means we have a memory leak for every call.
// http://blogs.msdn.com/b/jasonz/archive/2004/05/31/145105.aspx
}
}
}
return(ret);
}
/// <summary>This is the method for recursing through the AssemblyNames.
/// It returns a tree of AssemblyNames.
/// </summary>
/// <param name="assembly"></param>
/// <returns></returns>
private static AssemblynameNode GetRecursive(Assembly assembly)
{
if (null == assembly) { throw new System.ArgumentNullException("assembly"); }
// http://msdn.microsoft.com/en-us/magazine/cc163641.aspx <- reflection
// http://dotnetdebug.net/2005/11/15/net-assembly-loader/
// http://stackoverflow.com/questions/3971793/what-when-assembly-getreferencedassemblies-returns-exe-dependency <- reflectiononlyload and ditto loadfrom. solves which problem?
// We always have an AssemblyName to return.
var ret = new AssemblynameNode(assembly.GetName());
// Loop through the AssemblyNames the actual Assembly references. Note that we might have already been into the AssemblyName through
// another Assembly and then we have a circular reference which means stack overflow. It is taken care of in the loop.
foreach (var assemblyname in assembly.GetReferencedAssemblies())
{
// We only want to set the Info to have a list if we are sure we have referenced assemblies. If we don't have any referenced assemblies we will keep it as null.
// If we are in the loop we know there are references Assemblies. Below is shorthand for making sure we have a List and not touch it if we already have a List.
ret.ReferencedAssemblyNames = ret.ReferencedAssemblyNames ?? new List<AssemblynameNode>();
// Check if we alreay have found this Assemblyname. If we have; add it as a node but don't recurse its siblings.
if (_assemblynameList.ContainsKey(assemblyname.FullName))
{
ret.ReferencedAssemblyNames.Add(new AssemblynameNode(assemblyname));
}
else
{ // The AssemblyName is new for us.
// Add the AssemblyName to the list of AssemblyNames we have found.
_assemblynameList.Add(assemblyname.FullName, assemblyname);
// Gotta load the Assembly to get its references. Just AssemblyName won't do since AssemblyName doesn't have information about referenced Assemblies.
{
var ass = Assembly.Load(assemblyname.FullName);
ret.ReferencedAssemblyNames.Add(GetRecursive(ass));
// ReSharper disable RedundantAssignment
ass = null; // How do I unload? Can I? Should I?
// ReSharper restore RedundantAssignment
// Well... we can't unload in the default app domain. We should create a new, temporary, app domain and load/unload it there.
// Not being able to unload means we have a memory leak for every call.
// http://blogs.msdn.com/b/jasonz/archive/2004/05/31/145105.aspx
}
}
}
return ret;
}
