86 lines
3.5 KiB
C#
86 lines
3.5 KiB
C#
//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.Activities.Runtime
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{
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using System;
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using System.Collections.Generic;
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using System.Runtime;
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using System.Runtime.Serialization;
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using System.Security;
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[DataContract]
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class DelegateCompletionCallbackWrapper : CompletionCallbackWrapper
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{
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static readonly Type callbackType = typeof(DelegateCompletionCallback);
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static readonly Type[] callbackParameterTypes = new Type[] { typeof(NativeActivityContext), typeof(ActivityInstance), typeof(IDictionary<string, object>) };
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Dictionary<string, object> results;
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public DelegateCompletionCallbackWrapper(DelegateCompletionCallback callback, ActivityInstance owningInstance)
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: base(callback, owningInstance)
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{
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this.NeedsToGatherOutputs = true;
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}
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[DataMember(EmitDefaultValue = false, Name = "results")]
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internal Dictionary<string, object> SerializedResults
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{
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get { return this.results; }
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set { this.results = value; }
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}
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protected override void GatherOutputs(ActivityInstance completedInstance)
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{
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if (completedInstance.Activity.HandlerOf != null)
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{
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IList<RuntimeDelegateArgument> runtimeArguments = completedInstance.Activity.HandlerOf.RuntimeDelegateArguments;
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LocationEnvironment environment = completedInstance.Environment;
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for (int i = 0; i < runtimeArguments.Count; i++)
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{
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RuntimeDelegateArgument runtimeArgument = runtimeArguments[i];
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if (runtimeArgument.BoundArgument != null)
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{
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if (ArgumentDirectionHelper.IsOut(runtimeArgument.Direction))
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{
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Location parameterLocation = environment.GetSpecificLocation(runtimeArgument.BoundArgument.Id);
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if (parameterLocation != null)
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{
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if (this.results == null)
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{
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this.results = new Dictionary<string, object>();
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}
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this.results.Add(runtimeArgument.Name, parameterLocation.Value);
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}
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}
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}
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}
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}
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}
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[Fx.Tag.SecurityNote(Critical = "Because we are calling EnsureCallback",
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Safe = "Safe because the method needs to be part of an Activity and we are casting to the callback type and it has a very specific signature. The author of the callback is buying into being invoked from PT.")]
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[SecuritySafeCritical]
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protected internal override void Invoke(NativeActivityContext context, ActivityInstance completedInstance)
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{
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EnsureCallback(callbackType, callbackParameterTypes);
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DelegateCompletionCallback completionCallback = (DelegateCompletionCallback)this.Callback;
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IDictionary<string, object> returnValue = this.results;
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if (returnValue == null)
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{
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returnValue = ActivityUtilities.EmptyParameters;
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}
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completionCallback(context, completedInstance, returnValue);
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}
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}
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}
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