TransactionContextValidator.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Common / AuthoringOM / Compiler / Validation / TransactionContextValidator.cs / 1305376 / TransactionContextValidator.cs
                        
                        
                            namespace System.Workflow.ComponentModel.Compiler 
{
    using System;
    using System.Reflection;
    using System.Globalization; 
    using System.Collections.Generic;
    using System.Workflow.ComponentModel.Design; 
 
    internal sealed class TransactionContextValidator : Validator
    { 
        #region Validate Method

        public override ValidationErrorCollection Validate(ValidationManager manager, object obj)
        { 
            ValidationErrorCollection validationErrors = base.Validate(manager, obj);
 
            Activity activity = obj as Activity; 
            if (activity == null)
                throw new ArgumentException(SR.GetString(SR.Error_UnexpectedArgumentType, typeof(Activity).FullName), "obj"); 

            WorkflowTransactionOptions atomicTransaction = TransactedContextFilter.GetTransactionOptions(activity);
            if (atomicTransaction != null)
            { 
                // Atomic scopes can't have exception handlers.
                CompositeActivity exceptionHandlers = FaultAndCancellationHandlingFilter.GetFaultHandlers(activity); 
                if (exceptionHandlers != null) 
                {
                    ValidationError error = new ValidationError(SR.GetString(SR.Error_AtomicScopeWithFaultHandlersActivityDecl, activity.Name), ErrorNumbers.Error_AtomicScopeWithFaultHandlersActivityDecl); 
                    validationErrors.Add(error);
                }

                // Atomic scopes can't have cancel handlers. 
                Activity cancellationHandler = FaultAndCancellationHandlingFilter.GetCancellationHandler(activity);
                if (cancellationHandler != null) 
                { 
                    ValidationError error = new ValidationError(SR.GetString(SR.Error_AtomicScopeWithCancellationHandlerActivity, activity.Name), ErrorNumbers.Error_AtomicScopeWithCancellationHandlerActivity);
                    validationErrors.Add(error); 
                }

                // check that this transaction scope is not nested inside another transaction scope
                Activity parent = activity.Parent; 
                while (parent != null)
                { 
                    if (parent.SupportsTransaction) 
                    {
                        validationErrors.Add(new ValidationError(SR.GetString(SR.Error_AtomicScopeNestedInNonLRT), ErrorNumbers.Error_AtomicScopeNestedInNonLRT)); 
                        break;
                    }
                    parent = parent.Parent;
                } 

                // check that an activity with PersistOnClose/SupportsTransaction/ICompensatableActivity attribute is not nested inside the transaction scope 
                Queue nestedEnabledActivities = new Queue(Helpers.GetAllEnabledActivities((CompositeActivity)activity)); 
                while (nestedEnabledActivities.Count > 0)
                { 
                    Activity nestedEnabledActivity = nestedEnabledActivities.Dequeue();
                    if (nestedEnabledActivity.PersistOnClose)
                    {
                        validationErrors.Add(new ValidationError(SR.GetString(SR.Error_LRTScopeNestedInNonLRT), ErrorNumbers.Error_LRTScopeNestedInNonLRT)); 
                        break;
                    } 
                    if (nestedEnabledActivity is ICompensatableActivity) 
                    {
                        validationErrors.Add(new ValidationError(SR.GetString(SR.Error_NestedCompensatableActivity, nestedEnabledActivity.QualifiedName), ErrorNumbers.Error_NestedCompensatableActivity)); 
                        break;
                    }

                    if (nestedEnabledActivity is CompositeActivity) 
                    {
                        foreach (Activity nestedEnabledActivity2 in Helpers.GetAllEnabledActivities((CompositeActivity)nestedEnabledActivity)) 
                            nestedEnabledActivities.Enqueue(nestedEnabledActivity2); 
                    }
                } 

                // check timeout property
                if (atomicTransaction.TimeoutDuration.Ticks < 0)
                { 
                    ValidationError timeoutError = new ValidationError(SR.GetString(SR.Error_NegativeValue, new object[] { atomicTransaction.TimeoutDuration.ToString(), "TimeoutDuration" }), ErrorNumbers.Error_NegativeValue);
                    timeoutError.PropertyName = "TimeoutDuration"; 
                    validationErrors.Add(timeoutError); 
                }
            } 
            return validationErrors;
        }

        public override ValidationError ValidateActivityChange(Activity activity, ActivityChangeAction action) 
        {
            if (activity == null) 
                throw new ArgumentNullException("activity"); 

            if (action == null) 
                throw new ArgumentNullException("action");

            AddedActivityAction addedAction = action as AddedActivityAction;
 
            if (addedAction != null)
            { 
                //Check existence of nested PersistOnClose/ICompensatable/SupportsTransaction nested anywhere 
                //in the added activity branch
                System.Collections.Generic.Queue childrenQueue = new System.Collections.Generic.Queue(); 
                childrenQueue.Enqueue(addedAction.AddedActivity);

                while (childrenQueue.Count != 0)
                { 
                    Activity childActivity = childrenQueue.Dequeue();
 
                    if (childActivity.SupportsTransaction) 
                        return new ValidationError(SR.GetString(SR.Error_AtomicScopeNestedInNonLRT), ErrorNumbers.Error_AtomicScopeNestedInNonLRT);
 
                    if (childActivity.PersistOnClose)
                        return new ValidationError(SR.GetString(SR.Error_NestedPersistOnClose, activity.QualifiedName), ErrorNumbers.Error_NestedPersistOnClose);

                    if (childActivity is ICompensatableActivity) 
                        return new ValidationError(SR.GetString(SR.Error_NestedCompensatableActivity, activity.QualifiedName), ErrorNumbers.Error_NestedCompensatableActivity);
 
                    CompositeActivity compositeActivity = childActivity as CompositeActivity; 

                    if (compositeActivity != null) 
                    {
                        foreach (Activity grandChild in compositeActivity.EnabledActivities)
                        {
                            childrenQueue.Enqueue(grandChild); 
                        }
                    } 
                } 
            }
            return base.ValidateActivityChange(activity, action); 
        }
        #endregion
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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TransactionContextValidator.cs source code in C# .NET

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