// if the 1st parameter "supportedVersionXamlxfilePath" is null, we fall back to the primary generated type
internal static ICompiledExpressionRoot GetExpressionRoot(string supportedVersionXamlxfilePath, WorkflowService service, string virtualPath)
{
Assembly compiledAssembly = BuildManager.GetCompiledAssembly(virtualPath);
if (compiledAssembly == null)
{
return(null);
}
Type generatedType;
if (supportedVersionXamlxfilePath != null)
{
string fullTypeNameToSearch = GeneratedNamespace + "." + WorkflowServiceHostFactory.GetSupportedVersionGeneratedTypeName(supportedVersionXamlxfilePath) + ExpressionRootFactorySuffix;
generatedType = compiledAssembly.GetType(fullTypeNameToSearch);
}
else
{
generatedType = BuildManager.GetCompiledType(virtualPath);
}
Type workflowServiceType = typeof(WorkflowService);
if (generatedType != workflowServiceType && workflowServiceType.IsAssignableFrom(generatedType))
{
MethodInfo createExpressionRootMethod = generatedType.GetMethod(CreateExpressionRootMethodName, BindingFlags.Public | BindingFlags.Static);
if (createExpressionRootMethod != null)
{
return((ICompiledExpressionRoot)createExpressionRootMethod.Invoke(null, new object[] { service.Body }));
}
}
return(null);
}
void GenerateSource(bool isSupportedVersion, string filePath, AssemblyBuilder assemblyBuilder, WorkflowService workflowService, out string codeFileName, out bool generatedSource, out string activityName)
{
// Get unique file and type name for the workflowservice
codeFileName = assemblyBuilder.GetTempFilePhysicalPath(assemblyBuilder.CodeDomProvider.FileExtension);
if (isSupportedVersion)
{
activityName = WorkflowServiceHostFactory.GetSupportedVersionGeneratedTypeName(filePath);
}
else
{
activityName = workflowService.Name.LocalName + "_" + Guid.NewGuid().ToString().Replace("-", "_");
}
TextExpressionCompilerSettings settings = new TextExpressionCompilerSettings
{
Activity = workflowService.Body,
ActivityName = activityName,
ActivityNamespace = GeneratedNamespace,
Language = CodeDomProvider.GetLanguageFromExtension(assemblyBuilder.CodeDomProvider.FileExtension),
GenerateAsPartialClass = false,
AlwaysGenerateSource = false,
ForImplementation = false
};
TextExpressionCompiler compiler = new TextExpressionCompiler(settings);
generatedSource = false;
using (StreamWriter fileStream = new StreamWriter(codeFileName))
{
try
{
generatedSource = compiler.GenerateSource(fileStream);
}
catch (Exception ex)
{
if (Fx.IsFatal(ex))
{
throw;
}
throw FxTrace.Exception.AsError(new HttpCompileException(SR.XamlBuildProviderExtensionException(ex.Message)));
}
}
}
