Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.Activities / System / Activities / ActivityContext.cs / 1305376 / ActivityContext.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace System.Activities { using System; using System.Activities.Runtime; using System.Activities.Tracking; using System.Diagnostics.CodeAnalysis; using System.Runtime; [Fx.Tag.XamlVisible(false)] public class ActivityContext { ActivityInstance instance; ActivityExecutor executor; bool isDisposed; // Used by subclasses that are pooled. internal ActivityContext() { } // these can only be created by the WF Runtime internal ActivityContext(ActivityInstance instance, ActivityExecutor executor) { Fx.Assert(instance != null, "valid activity instance is required"); this.instance = instance; this.executor = executor; this.Activity = this.instance.Activity; } internal LocationEnvironment Environment { get { ThrowIfDisposed(); return this.instance.Environment; } } internal bool AllowChainedEnvironmentAccess { get; set; } internal Activity Activity { get; set; } internal ActivityInstance CurrentInstance { get { return this.instance; } } public string ActivityInstanceId { get { ThrowIfDisposed(); return this.instance.Id; } } public Guid WorkflowInstanceId { get { ThrowIfDisposed(); return this.executor.WorkflowInstanceId; } } public WorkflowDataContext DataContext { get { ThrowIfDisposed(); if (this.instance.DataContext == null) { this.instance.DataContext = new WorkflowDataContext(this.executor, this.instance); } return this.instance.DataContext; } } internal bool IsDisposed { get { return this.isDisposed; } } public T GetExtension() where T : class { ThrowIfDisposed(); return this.executor.GetExtension (); } internal void Reinitialize(ActivityInstance instance, ActivityExecutor executor) { this.isDisposed = false; this.instance = instance; this.executor = executor; this.Activity = this.instance.Activity; } // extra insurance against misuse (if someone stashes away the execution context to use later) internal void Dispose() { this.isDisposed = true; this.instance = null; this.executor = null; this.Activity = null; } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. public Location GetLocation (LocationReference locationReference) { ThrowIfDisposed(); if (locationReference == null) { throw FxTrace.Exception.ArgumentNull("locationReference"); } Location location = locationReference.GetLocation(this); Location typedLocation = location as Location ; if (typedLocation != null) { return typedLocation; } else { Fx.Assert(location != null, "The contract of LocationReference is that GetLocation never returns null."); if (locationReference.Type == typeof(T)) { return new TypedLocationWrapper (location); } else { throw FxTrace.Exception.AsError(new InvalidOperationException(SR.LocationTypeMismatch(locationReference.Name, typeof(T), locationReference.Type))); } } } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. public T GetValue (LocationReference locationReference) { ThrowIfDisposed(); if (locationReference == null) { throw FxTrace.Exception.ArgumentNull("locationReference"); } return GetValueCore (locationReference); } internal T GetValueCore (LocationReference locationReference) { Location location = locationReference.GetLocation(this); Location typedLocation = location as Location ; if (typedLocation != null) { // If we hit this path we can avoid boxing value types return typedLocation.Value; } else { Fx.Assert(location != null, "The contract of LocationReference is that GetLocation never returns null."); return TypeHelper.Convert (location.Value); } } public void SetValue (LocationReference locationReference, T value) { ThrowIfDisposed(); if (locationReference == null) { throw FxTrace.Exception.ArgumentNull("locationReference"); } SetValueCore (locationReference, value); } internal void SetValueCore (LocationReference locationReference, T value) { Location location = locationReference.GetLocation(this); Location typedLocation = location as Location ; if (typedLocation != null) { // If we hit this path we can avoid boxing value types typedLocation.Value = value; } else { if (!TypeHelper.AreTypesCompatible(value, locationReference.Type)) { throw FxTrace.Exception.AsError(new InvalidOperationException(SR.CannotSetValueToLocation(value != null ? value.GetType() : typeof(T), locationReference.Name, locationReference.Type))); } location.Value = value; } } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. [SuppressMessage(FxCop.Category.Design, FxCop.Rule.ConsiderPassingBaseTypesAsParameters, Justification = "Generic needed for type inference")] public T GetValue (OutArgument argument) { ThrowIfDisposed(); if (argument == null) { throw FxTrace.Exception.ArgumentNull("argument"); } argument.ThrowIfNotInTree(); return GetValueCore (argument.RuntimeArgument); } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. [SuppressMessage(FxCop.Category.Design, FxCop.Rule.ConsiderPassingBaseTypesAsParameters, Justification = "Generic needed for type inference")] public T GetValue (InOutArgument argument) { ThrowIfDisposed(); if (argument == null) { throw FxTrace.Exception.ArgumentNull("argument"); } argument.ThrowIfNotInTree(); return GetValueCore (argument.RuntimeArgument); } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. [SuppressMessage(FxCop.Category.Design, FxCop.Rule.ConsiderPassingBaseTypesAsParameters, Justification = "Generic needed for type inference")] public T GetValue (InArgument argument) { ThrowIfDisposed(); if (argument == null) { throw FxTrace.Exception.ArgumentNull("argument"); } argument.ThrowIfNotInTree(); return GetValueCore (argument.RuntimeArgument); } // Soft-Link: This method is referenced through reflection by // ExpressionUtilities.TryRewriteLambdaExpression. Update that // file if the signature changes. public object GetValue(Argument argument) { ThrowIfDisposed(); if (argument == null) { throw FxTrace.Exception.ArgumentNull("argument"); } argument.ThrowIfNotInTree(); return GetValueCore
Link Menu

This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- SemaphoreSecurity.cs
- CellRelation.cs
- GroupItemAutomationPeer.cs
- MailSettingsSection.cs
- HeaderedItemsControl.cs
- TransformedBitmap.cs
- xsdvalidator.cs
- XmlNodeChangedEventManager.cs
- CssTextWriter.cs
- InputBuffer.cs
- DefaultDialogButtons.cs
- TextServicesCompartment.cs
- XmlIncludeAttribute.cs
- DebugHandleTracker.cs
- PagesChangedEventArgs.cs
- listitem.cs
- DataGridViewToolTip.cs
- WebPartDisplayModeCollection.cs
- WarningException.cs
- ChtmlTextBoxAdapter.cs
- FillErrorEventArgs.cs
- MobileControlsSection.cs
- CloseCollectionAsyncResult.cs
- EntityRecordInfo.cs
- InfoCardRSAPKCS1SignatureDeformatter.cs
- DynamicDataManager.cs
- SapiInterop.cs
- RtfToXamlReader.cs
- Codec.cs
- DataSourceSelectArguments.cs
- ProcessInfo.cs
- ObjectAssociationEndMapping.cs
- UrlPropertyAttribute.cs
- ExpanderAutomationPeer.cs
- ChtmlLinkAdapter.cs
- FontWeight.cs
- RepeatButton.cs
- NameValueFileSectionHandler.cs
- QueryResponse.cs
- LeftCellWrapper.cs
- HttpDebugHandler.cs
- HttpPostProtocolImporter.cs
- SafeCertificateStore.cs
- StreamUpdate.cs
- PreservationFileReader.cs
- DrawingState.cs
- XmlSchemaAttribute.cs
- StateDesigner.CommentLayoutGlyph.cs
- MessageQueue.cs
- XmlWriter.cs
- AddInEnvironment.cs
- InheritanceUI.cs
- ChangePassword.cs
- SelectorItemAutomationPeer.cs
- ToolStripStatusLabel.cs
- VirtualDirectoryMapping.cs
- PropertyPathConverter.cs
- ObjectStateManager.cs
- HttpHandlerAction.cs
- CodeDomComponentSerializationService.cs
- EdmToObjectNamespaceMap.cs
- HMACSHA256.cs
- ComProxy.cs
- TextDecorations.cs
- DataGridViewRowStateChangedEventArgs.cs
- ReliableChannelBinder.cs
- DetailsView.cs
- SqlDataSourceCommandEventArgs.cs
- ConfigurationManagerInternalFactory.cs
- WebService.cs
- BufferedGraphicsContext.cs
- GetWinFXPath.cs
- PixelShader.cs
- Table.cs
- OleDbPropertySetGuid.cs
- ArcSegment.cs
- GenericIdentity.cs
- AssemblyAttributesGoHere.cs
- HwndKeyboardInputProvider.cs
- ThreadPool.cs
- GeometryHitTestResult.cs
- TextureBrush.cs
- NamedObject.cs
- HelloOperationAsyncResult.cs
- RowUpdatedEventArgs.cs
- XmlNode.cs
- HMACSHA384.cs
- SimpleTextLine.cs
- DurableInstanceManager.cs
- ResourcePool.cs
- XmlChildNodes.cs
- JoinCqlBlock.cs
- StateDesigner.LayoutSelectionGlyph.cs
- DynamicFilter.cs
- PageThemeParser.cs
- MissingFieldException.cs
- DataServiceQueryContinuation.cs
- GradientSpreadMethodValidation.cs
- XPathPatternParser.cs
- DataGridViewTextBoxEditingControl.cs