ModelServiceImpl.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 / Model / ModelServiceImpl.cs / 1305376 / ModelServiceImpl.cs
                        

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

namespace System.Activities.Presentation.Model 
{
    using System.Collections.Generic; 
    using System.Diagnostics; 
    using System.Activities.Presentation.Services;
    using System.Runtime; 

    // This is the implementaion of the ModelService, this is published by the ModelTreeManager
    // on the editingContext. This is just a facade to the modelTreemanager methods.
 
    class ModelServiceImpl : ModelService
    { 
        ModelTreeManager modelTreeManager; 

        public ModelServiceImpl(ModelTreeManager modelTreeManager) 
        {
            if (modelTreeManager == null)
            {
                throw FxTrace.Exception.AsError( new ArgumentNullException("modelTreeManager")); 
            }
            this.modelTreeManager = modelTreeManager; 
        } 

        public override event EventHandler ModelChanged; 

        public override ModelItem Root
        {
            get 
            {
                return modelTreeManager.Root; 
            } 
        }
 
        public override IEnumerable Find(ModelItem startingItem, Predicate match)
        {
            return modelTreeManager.Find(startingItem, match, false);
        } 

        public override IEnumerable Find(ModelItem startingItem, Type type) 
        { 
            if (startingItem == null)
            { 
                throw FxTrace.Exception.AsError( new ArgumentNullException("startingItem"));
            }

            if (type == null) 
            {
                throw FxTrace.Exception.AsError( new ArgumentNullException("type")); 
            } 
            Fx.Assert(!type.IsValueType, "hmm why would some one search for modelitems for value types?");
            return modelTreeManager.Find(startingItem, delegate(Type modelItemType) 
            {
                return type.IsAssignableFrom(modelItemType);
            }, false);
        } 

        public override ModelItem FromName(ModelItem scope, string name, StringComparison comparison) 
        { 
            // The workflow component model does not implement a unique named activity object right now
            // so we cannot support this feature. 
            throw FxTrace.Exception.AsError( new NotSupportedException());
        }

        internal void OnModelItemAdded(ModelItem modelItem) 
        {
            Fx.Assert(modelItem != null, "modelItem should not be null"); 
            if (ModelChanged != null) 
            {
                Fx.Assert(modelItem != null, "trying to add empty model item"); 
                List modelItemsAdded = new List(1);
                modelItemsAdded.Add(modelItem);
                ModelChanged.Invoke(this, new ModelChangedEventArgsImpl(modelItemsAdded, null, null));
                modelTreeManager.SyncModelAndText(); 
            }
        } 
 
        internal void OnModelItemRemoved(ModelItem modelItem)
        { 
            Fx.Assert(modelItem != null, "modelItem should not be null");
            if (ModelChanged != null)
            {
                List modelItemsRemoved = new List(1); 
                modelItemsRemoved.Add(modelItem);
                ModelChanged.Invoke(this, new ModelChangedEventArgsImpl(null, modelItemsRemoved, null)); 
                modelTreeManager.SyncModelAndText(); 
            }
        } 

        internal void OnModelItemsRemoved(IEnumerable modelItems)
        {
            Fx.Assert(modelItems != null, "modelItem should not be null"); 
            if (ModelChanged != null)
            { 
                List modelItemsRemoved = new List(); 
                modelItemsRemoved.AddRange(modelItems);
                ModelChanged.Invoke(this, new ModelChangedEventArgsImpl(null, modelItemsRemoved, null)); 
                modelTreeManager.SyncModelAndText();
            }
        }
 
        internal void OnModelPropertyChanged(ModelProperty property)
        { 
            Fx.Assert(property != null,"property cannot be null"); 
            if (ModelChanged != null)
            { 
                List propertiesChanged = new List(1);
                propertiesChanged.Add(property);
                ModelChanged.Invoke(this, new ModelChangedEventArgsImpl(null, null, propertiesChanged));
                modelTreeManager.SyncModelAndText(); 
            }
        } 
 
        protected override ModelItem CreateItem(object instance)
        { 
            return modelTreeManager.CreateModelItem(null, instance);
        }

        protected override ModelItem CreateItem(Type itemType, CreateOptions options, params object[] arguments) 
        {
            Object instance = Activator.CreateInstance(itemType, arguments); 
            return modelTreeManager.CreateModelItem(null, instance); 
        }
 
        protected override ModelItem CreateStaticMemberItem(Type type, string memberName)
        {
            throw FxTrace.Exception.AsError( new NotSupportedException());
        } 

        internal ModelItem WrapAsModelItem(object instance) 
        { 
            return CreateItem(instance);
        } 
    }
}

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

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