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namespace System.Workflow.ComponentModel.Compiler
{
using System;
using System.Reflection;
using System.Collections.Specialized;
using System.ComponentModel.Design;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Design;
#region Class Assembly resolver
// In the cases where the WorkflowCompiler is invoked directly, we need to deserialize the
// xoml before we can create the real TypeProvider, hence it is necessary to look at the
// referenced assemblies for any types that fail to load. In the VS scenarios, the TypeProvider
// has already been created and the WorkflowMarkupSerializer will use it first.
internal sealed class ReferencedAssemblyResolver
{
private StringCollection referencedAssemblies = new StringCollection();
private Assembly localAssembly;
private bool resolving = false;
public ReferencedAssemblyResolver(StringCollection referencedAssemblies, Assembly localAssembly)
{
this.referencedAssemblies = referencedAssemblies;
this.localAssembly = localAssembly;
}
public Assembly ResolveEventHandler(object sender, ResolveEventArgs args)
{
return ResolveAssembly(args.Name);
}
internal void SetLocalAssembly(Assembly localAsm)
{
this.localAssembly = localAsm;
}
private Assembly ResolveAssembly(string name)
{
if (this.resolving)
return null;
// First look for the local assembly.
if (this.localAssembly != null && name == this.localAssembly.FullName)
return this.localAssembly;
try
{
this.resolving = true;
AssemblyName assemblyName = new AssemblyName(name);
// Then try the referenced assemblies.
foreach (string assemblyPath in this.referencedAssemblies)
{
try
{
AssemblyName referenceAssemblyName = AssemblyName.GetAssemblyName(assemblyPath);
if (referenceAssemblyName != null && ParseHelpers.AssemblyNameEquals(referenceAssemblyName, assemblyName))
{
Assembly reference = null;
try
{
reference = Assembly.Load(referenceAssemblyName);
}
catch
{
reference = Assembly.LoadFrom(assemblyPath);
}
return reference;
}
}
catch
{
// Eat up any exceptions!
}
}
}
finally
{
this.resolving = false;
}
return null;
}
}
#endregion
}
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