DefaultWorkflowLoaderService.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 / WF / RunTime / Hosting / DefaultWorkflowLoaderService.cs / 1305376 / DefaultWorkflowLoaderService.cs
                        

                        
                            #region Imports 

using System;
using System.Diagnostics;
using System.Collections; 
using System.Collections.Generic;
using System.Xml; 
using System.Text; 
using System.IO;
using System.ComponentModel.Design; 
using System.ComponentModel.Design.Serialization;
using System.Workflow.ComponentModel;
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Serialization; 
using System.Workflow.ComponentModel.Design;
using System.Workflow.Runtime; 
 
#endregion
 

namespace System.Workflow.Runtime.Hosting
{
 
    public class DefaultWorkflowLoaderService : WorkflowLoaderService
    { 
        protected internal override Activity CreateInstance(Type workflowType) 
        {
            if (workflowType == null) 
                throw new ArgumentNullException("workflowType");

            if (!typeof(Activity).IsAssignableFrom(workflowType))
                throw new ArgumentException(ExecutionStringManager.TypeMustImplementRootActivity); 

            if (workflowType.GetConstructor(System.Type.EmptyTypes) == null) 
                throw new ArgumentException(ExecutionStringManager.TypeMustHavePublicDefaultConstructor); 

            return Activator.CreateInstance(workflowType) as Activity; 
        }

        // This function will create a new root activity definition tree by deserializing the xoml and the rules file.
        protected internal override Activity CreateInstance(XmlReader workflowDefinitionReader, XmlReader rulesReader) 
        {
            if (workflowDefinitionReader == null) 
                throw new ArgumentNullException("workflowDefinitionReader"); 

            Activity root = null; 
            ValidationErrorCollection errors = new ValidationErrorCollection();
            ServiceContainer serviceContainer = new ServiceContainer();
            ITypeProvider typeProvider = this.Runtime.GetService();
            if (typeProvider != null) 
                serviceContainer.AddService(typeof(ITypeProvider), typeProvider);
 
            DesignerSerializationManager manager = new DesignerSerializationManager(serviceContainer); 
            try
            { 
                using (manager.CreateSession())
                {
                    WorkflowMarkupSerializationManager xomlSerializationManager = new WorkflowMarkupSerializationManager(manager);
                    root = new WorkflowMarkupSerializer().Deserialize(xomlSerializationManager, workflowDefinitionReader) as Activity; 
                    if (root != null && rulesReader != null)
                    { 
                        object rules = new WorkflowMarkupSerializer().Deserialize(xomlSerializationManager, rulesReader); 
                        root.SetValue(ConditionTypeConverter.DeclarativeConditionDynamicProp, rules);
                    } 

                    foreach (object error in manager.Errors)
                    {
                        if (error is WorkflowMarkupSerializationException) 
                            errors.Add(new ValidationError(((WorkflowMarkupSerializationException)error).Message, ErrorNumbers.Error_SerializationError));
                        else 
                            errors.Add(new ValidationError(error.ToString(), ErrorNumbers.Error_SerializationError)); 
                    }
                } 
            }
            catch (Exception e)
            {
                errors.Add(new ValidationError(e.Message, ErrorNumbers.Error_SerializationError)); 
            }
 
            if (errors.HasErrors) 
                throw new WorkflowValidationFailedException(ExecutionStringManager.WorkflowValidationFailure, errors);
 
            return root;
        }
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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