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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.Workflow.Runtime
{
using System.ComponentModel.Design;
using System.Reflection;
using System.Runtime;
using System.ServiceModel;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Compiler;
abstract class WorkflowDefinitionContext
{
WorkflowRuntime workflowRuntime;
public abstract string ConfigurationName
{
get;
}
public abstract string WorkflowName
{
get;
}
internal protected WorkflowRuntime WorkflowRuntime
{
get
{
Fx.Assert(this.workflowRuntime != null, "Attempt to call WorkflowRuntime before Register");
return this.workflowRuntime;
}
}
public abstract WorkflowInstance CreateWorkflow();
public abstract WorkflowInstance CreateWorkflow(Guid instanceId);
public abstract Activity GetWorkflowDefinition();
internal void Register(WorkflowRuntime workflowRuntime, bool validate)
{
if (workflowRuntime == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("workflowRuntime");
}
this.workflowRuntime = workflowRuntime;
OnRegister();
if (!this.workflowRuntime.IsStarted)
{
this.workflowRuntime.StartRuntime();
}
if (validate)
{
ValidateDefinition();
}
}
protected static TypeProvider CreateTypeProvider(Activity rootActivity)
{
TypeProvider typeProvider = new TypeProvider(null);
Type companionType = rootActivity.GetType();
typeProvider.SetLocalAssembly(companionType.Assembly);
typeProvider.AddAssembly(companionType.Assembly);
foreach (AssemblyName assemblyName in companionType.Assembly.GetReferencedAssemblies())
{
Assembly referencedAssembly = null;
try
{
referencedAssembly = Assembly.Load(assemblyName);
if (referencedAssembly != null)
{
typeProvider.AddAssembly(referencedAssembly);
}
}
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
}
if (referencedAssembly == null && assemblyName.CodeBase != null)
{
typeProvider.AddAssemblyReference(assemblyName.CodeBase);
}
}
return typeProvider;
}
protected abstract void OnRegister();
protected abstract void OnValidate(ValidationErrorCollection errors);
void ValidateDefinition()
{
ValidationErrorCollection errors = new ValidationErrorCollection();
Activity rootActivity = GetWorkflowDefinition();
ITypeProvider typeProvider = CreateTypeProvider(rootActivity);
ServiceContainer serviceContainer = new ServiceContainer();
serviceContainer.AddService(typeof(ITypeProvider), typeProvider);
ValidationManager validationManager = new ValidationManager(serviceContainer);
foreach (Validator validator in validationManager.GetValidators(rootActivity.GetType()))
{
foreach (ValidationError error in validator.Validate(validationManager, rootActivity))
{
if (!error.UserData.Contains(typeof(Activity)))
{
error.UserData[typeof(Activity)] = rootActivity;
}
errors.Add(error);
}
}
OnValidate(errors);
if (errors.HasErrors)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new WorkflowValidationFailedException(SR2.WorkflowValidationFailed, errors));
}
}
}
}
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