ActivityBuilderHelper.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 / Tools / System.Activities.Presentation / System / Activities / Presentation / Xaml / ActivityBuilderHelper.cs / 1407647 / ActivityBuilderHelper.cs
                        

                        
                            //---------------------------------------------------------------- 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//---------------------------------------------------------------

namespace System.Activities.Presentation.Xaml 
{
    using System.Activities.Debugger; 
    using System.Activities.Presentation.Model; 
    using System.Collections.Generic;
    using System.ComponentModel; 
    using System.Runtime;
    using System.Windows.Markup;

 
    internal class ActivityBuilderHelper
    { 
        internal static bool IsActivityBuilderType(ModelItem modelItem) 
        {
            if (null == modelItem) 
            {
                throw FxTrace.Exception.AsError(new ArgumentNullException("modelItem"));
            }
            return modelItem.ItemType.IsAssignableFrom(typeof(ActivityBuilder)); 
        }
 
        internal static List GetVariables(object input) 
        {
            if (null == input) 
            {
                throw FxTrace.Exception.AsError(new ArgumentNullException("input"));
            }
            ModelItem astAsModelItem = input as ModelItem; 
            ActivityBuilder instance = input as ActivityBuilder;
            if (null != astAsModelItem) 
            { 
                if (!astAsModelItem.ItemType.IsAssignableFrom(typeof(ActivityBuilder)))
                { 
                    throw FxTrace.Exception.AsError(new InvalidCastException(astAsModelItem.ItemType.FullName));
                }
                instance = (ActivityBuilder)astAsModelItem.GetCurrentValue();
            } 
            else if (null == instance)
            { 
                throw FxTrace.Exception.AsError(new InvalidCastException(input.GetType().FullName)); 
            }
 
            List variables = new List();
            foreach (DynamicActivityProperty property in instance.Properties)
            {
                if (property != null) 
                {
                    Variable autoVariable = GetVariableFromProperty(property); 
                    if (autoVariable != null) 
                    {
                        variables.Add(autoVariable); 
                    }
                }
            }
            return variables; 
        }
 
        internal static Variable GetVariableFromProperty(DynamicActivityProperty property) 
        {
            Type variableType = null; 
            Variable autoVariable = null;

            if (property.Type != null)
            { 
                Type propertyType = property.Type;
 
                // if the property is an Argument create a variable of type T 
                if (propertyType != null && typeof(Argument).IsAssignableFrom(propertyType))
                { 
                    if (propertyType.IsGenericType)
                    {
                        variableType = propertyType.GetGenericArguments()[0];
                    } 
                    else
                    { 
                        variableType = typeof(object); 
                    }
                } 
            }
            if (variableType != null)
            {
                autoVariable = Variable.Create(property.Name, variableType, VariableModifiers.None); 
                Argument argument = property.Value as Argument;
                if (argument != null) 
                { 
                    autoVariable.Default = argument.Expression;
                } 
            }
            return autoVariable;
        }
    } 
}

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

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