Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx35 / System.WorkflowServices / System / Workflow / Activities / ContextToken.cs / 1305376 / ContextToken.cs
//------------------------------------------------------------ // 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))] 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; StackactivityStack = new Stack (); 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)); } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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