DefaultConfirmation.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / NetFx40 / System.Activities / System / Activities / Statements / DefaultConfirmation.cs / 1305376 / DefaultConfirmation.cs
                        

                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------
namespace System.Activities.Statements
{ 
    using System;
    using System.Collections.Generic; 
    using System.Collections.ObjectModel; 
    using System.Runtime;
 
    sealed class DefaultConfirmation : NativeActivity
    {
        Activity body;
        Variable toConfirmToken; 
        CompletionCallback onChildConfirmed;
 
        public DefaultConfirmation() 
            : base()
        { 
            this.toConfirmToken = new Variable();

            this.body = new InternalConfirm()
                { 
                    Target = new InArgument(toConfirmToken),
                }; 
        } 

        public InArgument Target 
        {
            get;
            set;
        } 

        Activity Body 
        { 
            get { return this.body; }
        } 

        protected override void CacheMetadata(NativeActivityMetadata metadata)
        {
            RuntimeArgument targetArgument = new RuntimeArgument("Target", typeof(CompensationToken), ArgumentDirection.In); 
            metadata.Bind(this.Target, targetArgument);
            metadata.SetArgumentsCollection(new Collection { targetArgument }); 
 
            metadata.SetImplementationVariablesCollection(new Collection { this.toConfirmToken });
 
            Fx.Assert(this.Body != null, "Body must be valid");
            metadata.SetImplementationChildrenCollection(new Collection { this.Body });
        }
 
        protected override void Execute(NativeActivityContext context)
        { 
            InternalExecute(context, null); 
        }
 
        void InternalExecute(NativeActivityContext context, ActivityInstance completedInstance)
        {
            CompensationExtension compensationExtension = context.GetExtension();
            if (compensationExtension == null) 
            {
                throw FxTrace.Exception.AsError(new InvalidOperationException(SR.ConfirmWithoutCompensableActivity(this.DisplayName))); 
            } 

            CompensationToken token = Target.Get(context); 
            CompensationTokenData tokenData = token == null ? null : compensationExtension.Get(token.CompensationId);

            Fx.Assert(tokenData != null, "CompensationTokenData must be valid");
 
            if (tokenData.ExecutionTracker.Count > 0)
            { 
                if (this.onChildConfirmed == null) 
                {
                    this.onChildConfirmed = new CompletionCallback(InternalExecute); 
                }

                this.toConfirmToken.Set(context, new CompensationToken(tokenData.ExecutionTracker.Get()));
 
                Fx.Assert(Body != null, "Body must be valid");
                context.ScheduleActivity(Body, this.onChildConfirmed); 
            } 
        }
 
        protected override void Cancel(NativeActivityContext context)
        {
            // Suppress Cancel
        } 
    }
 
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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