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//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.Workflow.Activities
{
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.ComponentModel.Design.Serialization;
using System.Diagnostics.CodeAnalysis;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Dispatcher;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Design;
using System.Workflow.ComponentModel.Serialization;
using System.Xml;
[DesignerSerializer(typeof(DependencyObjectCodeDomSerializer), typeof(CodeDomSerializer))]
[Obsolete("The System.Workflow.* types are deprecated. Instead, please use the new types from System.Activities.*")]
public sealed class ContextToken : DependencyObject, IPropertyValueProvider
{
public const string RootContextName = "(RootContext)";
[SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
internal static readonly DependencyProperty NameProperty =
DependencyProperty.Register("Name",
typeof(string),
typeof(ContextToken),
new PropertyMetadata(null,
DependencyPropertyOptions.Metadata,
new Attribute[] { new BrowsableAttribute(false) }));
[SuppressMessage("Microsoft.Security", "CA2104:DoNotDeclareReadOnlyMutableReferenceTypes")]
internal static readonly DependencyProperty OwnerActivityNameProperty =
DependencyProperty.Register("OwnerActivityName",
typeof(string),
typeof(ContextToken),
new PropertyMetadata(null,
DependencyPropertyOptions.Metadata,
new Attribute[] { new TypeConverterAttribute(typeof(PropertyValueProviderTypeConverter)) }));
public ContextToken()
{
this.Name = ContextToken.RootContextName;
}
public ContextToken(string name)
{
if (string.IsNullOrEmpty(name))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("name",
SR2.GetString(SR2.Error_ArgumentValueNullOrEmptyString));
}
this.Name = name;
}
[Browsable(false)]
[DefaultValue(null)]
[SR2Description(SR2DescriptionAttribute.ContextToken_Name_Description)]
public string Name
{
get
{
return (string) GetValue(NameProperty);
}
set
{
SetValue(NameProperty, value);
}
}
[DefaultValue(null)]
[TypeConverter(typeof(PropertyValueProviderTypeConverter))]
[SR2Description(SR2DescriptionAttribute.ContextToken_OwnerActivityName_Description)]
public string OwnerActivityName
{
get
{
return (string) GetValue(OwnerActivityNameProperty);
}
set
{
SetValue(OwnerActivityNameProperty, value);
}
}
internal bool IsRootContext
{
get
{
if (!string.IsNullOrEmpty(this.OwnerActivityName))
{
return false;
}
if (string.Compare(this.Name, ContextToken.RootContextName, StringComparison.Ordinal) != 0)
{
return false;
}
return true;
}
}
ICollection IPropertyValueProvider.GetPropertyValues(ITypeDescriptorContext context)
{
StringCollection names = new StringCollection();
if (string.Equals(context.PropertyDescriptor.Name, "OwnerActivityName", StringComparison.Ordinal))
{
ISelectionService selectionService = context.GetService(typeof(ISelectionService)) as ISelectionService;
if (selectionService != null && selectionService.SelectionCount == 1 && selectionService.PrimarySelection is Activity)
{
// add empty string as an option
//
names.Add(string.Empty);
Activity currentActivity = selectionService.PrimarySelection as Activity;
foreach (Activity activity in GetEnclosingCompositeActivities(currentActivity))
{
string activityId = activity.QualifiedName;
if (!names.Contains(activityId))
{
names.Add(activityId);
}
}
}
}
return names;
}
internal static ReceiveContext GetReceiveContext(Activity activity,
string contextName,
string ownerActivityName)
{
if (activity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("activity");
}
if (string.IsNullOrEmpty(contextName))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("contextToken",
SR2.GetString(SR2.Error_ArgumentValueNullOrEmptyString));
}
Activity contextActivity = activity.ContextActivity;
Activity owner = null;
if (contextActivity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
if (string.IsNullOrEmpty(ownerActivityName))
{
owner = contextActivity.RootActivity;
}
else
{
while (contextActivity != null)
{
owner = contextActivity.GetActivityByName(ownerActivityName, true);
if (owner != null)
{
break;
}
contextActivity = contextActivity.Parent;
if (contextActivity != null)
{
contextActivity = contextActivity.ContextActivity;
}
}
}
if (owner == null)
{
owner = Helpers.ParseActivityForBind(activity, ownerActivityName);
}
if (owner == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
ReceiveContextCollection collection =
owner.GetValue(ReceiveContextCollection.ReceiveContextCollectionProperty) as ReceiveContextCollection;
if (collection == null)
{
return null;
}
if (!collection.Contains(contextName))
{
return null;
}
ReceiveContext receiveContext = collection[contextName];
receiveContext.EnsureInitialized(owner.ContextGuid);
return receiveContext;
}
internal static ReceiveContext GetRootReceiveContext(Activity activity)
{
if (activity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("activity");
}
Activity contextActivity = activity.ContextActivity;
if (contextActivity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
Activity owner = contextActivity.RootActivity;
if (owner == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
ReceiveContextCollection collection =
owner.GetValue(ReceiveContextCollection.ReceiveContextCollectionProperty) as ReceiveContextCollection;
if (collection == null)
{
return null;
}
if (!collection.Contains(ContextToken.RootContextName))
{
return null;
}
ReceiveContext receiveContext = collection[ContextToken.RootContextName];
receiveContext.EnsureInitialized(owner.ContextGuid);
return receiveContext;
}
internal static void Register(ReceiveActivity activity, Guid workflowId)
{
if (activity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("activity");
}
ContextToken contextToken = activity.ContextToken;
if (contextToken == null)
{
RegisterRootReceiveContext(activity, workflowId);
}
else if (contextToken.IsRootContext)
{
RegisterRootReceiveContext(activity, workflowId);
}
else
{
RegisterReceiveContext(activity, workflowId, contextToken.Name, contextToken.OwnerActivityName);
}
}
private static IEnumerable GetEnclosingCompositeActivities(Activity startActivity)
{
Activity currentActivity = null;
Stack<Activity> activityStack = new Stack<Activity>();
activityStack.Push(startActivity);
while ((currentActivity = activityStack.Pop()) != null)
{
if (currentActivity.Enabled)
{
yield return currentActivity;
}
activityStack.Push(currentActivity.Parent);
}
yield break;
}
static void RegisterReceiveContext(ReceiveActivity activity,
Guid workflowId,
string contextName,
string ownerActivityName)
{
if (activity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("activity");
}
if (string.IsNullOrEmpty(contextName))
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgument("contextName",
SR2.GetString(SR2.Error_ArgumentValueNullOrEmptyString));
}
Activity contextActivity = activity.ContextActivity;
Activity owner = null;
if (contextActivity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
if (string.IsNullOrEmpty(ownerActivityName))
{
owner = contextActivity.RootActivity;
}
else
{
while (contextActivity != null)
{
owner = contextActivity.GetActivityByName(ownerActivityName, true);
if (owner != null)
{
break;
}
contextActivity = contextActivity.Parent;
if (contextActivity != null)
{
contextActivity = contextActivity.ContextActivity;
}
}
}
if (owner == null)
{
owner = Helpers.ParseActivityForBind(activity, ownerActivityName);
}
if (owner == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
ReceiveContextCollection collection =
owner.GetValue(ReceiveContextCollection.ReceiveContextCollectionProperty) as ReceiveContextCollection;
if (collection == null)
{
collection = new ReceiveContextCollection();
owner.SetValue(ReceiveContextCollection.ReceiveContextCollectionProperty, collection);
}
if (!collection.Contains(contextName))
{
collection.Add(new ReceiveContext(contextName, workflowId, false));
}
}
static void RegisterRootReceiveContext(Activity activity, Guid workflowId)
{
if (activity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("activity");
}
Activity contextActivity = activity.ContextActivity;
if (contextActivity == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
Activity owner = contextActivity.RootActivity;
if (owner == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(
new InvalidOperationException(SR2.GetString(SR2.Error_ContextOwnerActivityMissing)));
}
ReceiveContextCollection collection =
owner.GetValue(ReceiveContextCollection.ReceiveContextCollectionProperty) as ReceiveContextCollection;
if (collection == null)
{
collection = new ReceiveContextCollection();
owner.SetValue(ReceiveContextCollection.ReceiveContextCollectionProperty, collection);
}
if (!collection.Contains(ContextToken.RootContextName))
{
collection.Add(new ReceiveContext(ContextToken.RootContextName, workflowId, true));
}
}
}
}
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