InstancePersistence.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 / System.Runtime.DurableInstancing / System / Runtime / DurableInstancing / InstancePersistence.cs / 1305376 / InstancePersistence.cs
                        

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

namespace System.Runtime.DurableInstancing 
{
    using System; 
    using System.Collections.Generic; 
    using System.Runtime;
    using System.Xml.Linq; 

    static class InstancePersistence
    {
        static readonly XNamespace activitiesCommandNamespace = XNamespace.Get("urn:schemas-microsoft-com:System.Activities.Persistence/command"); 
        static readonly XNamespace activitiesEventNamespace = XNamespace.Get("urn:schemas-microsoft-com:System.Activities.Persistence/event");
 
        internal static XNamespace ActivitiesCommandNamespace 
        {
            get 
            {
                return InstancePersistence.activitiesCommandNamespace;
            }
        } 

        internal static XNamespace ActivitiesEventNamespace 
        { 
            get
            { 
                return InstancePersistence.activitiesEventNamespace;
            }
        }
 
        public static void ValidatePropertyBag(this IDictionary bag)
        { 
            bag.ValidatePropertyBag(false); 
        }
 
        public static void ValidatePropertyBag(this IDictionary bag, bool allowDelete)
        {
            if (bag != null)
            { 
                foreach (KeyValuePair property in bag)
                { 
                    property.ValidateProperty(allowDelete); 
                }
            } 
        }

        public static void ValidateProperty(this KeyValuePair property)
        { 
            property.ValidateProperty(false);
        } 
 
        public static void ValidateProperty(this KeyValuePair property, bool allowDelete)
        { 
            if (property.Key == null)
            {
                throw Fx.Exception.AsError(new InvalidOperationException(SRCore.MetadataCannotContainNullKey));
            } 
            if (property.Value == null)
            { 
                throw Fx.Exception.AsError(new InvalidOperationException(SRCore.MetadataCannotContainNullValue(property.Key))); 
            }
            if (!allowDelete && property.Value.IsDeletedValue) 
            {
                throw Fx.Exception.AsError(new InvalidOperationException(SRCore.InitialMetadataCannotBeDeleted(property.Key)));
            }
        } 

        public static bool IsOptional(this InstanceValue value) 
        { 
            return (value.Options & InstanceValueOptions.Optional) != 0;
        } 

        public static bool IsWriteOnly(this InstanceValue value)
        {
            return (value.Options & InstanceValueOptions.WriteOnly) != 0; 
        }
 
        public static ReadOnlyDictionary ReadOnlyCopy(this IDictionary bag, bool allowWriteOnly) 
        {
            if (bag != null && bag.Count > 0) 
            {
                Dictionary copy = new Dictionary(bag.Count);
                foreach (KeyValuePair value in bag)
                { 
                    value.ValidateProperty();
                    if (!value.Value.IsWriteOnly()) 
                    { 
                        copy.Add(value.Key, value.Value);
                    } 
                    else if (!allowWriteOnly)
                    {
                        throw Fx.Exception.AsError(new InvalidOperationException(SRCore.LoadedWriteOnlyValue));
                    } 
                }
                return new ReadOnlyDictionary(copy, false); 
            } 
            else
            { 
                return null;
            }
        }
 
        public static ReadOnlyDictionary ReadOnlyMergeInto(this IDictionary bag, IDictionary existing, bool allowWriteOnly)
        { 
            Fx.Assert(existing == null || existing is ReadOnlyDictionary, "Should only be merging into other read-only dictionaries."); 

            if (bag != null && bag.Count > 0) 
            {
                Dictionary copy = existing == null ? new Dictionary(bag.Count) : new Dictionary(existing);
                foreach (KeyValuePair value in bag)
                { 
                    value.ValidateProperty(true);
                    if (value.Value.IsDeletedValue) 
                    { 
                        copy.Remove(value.Key);
                    } 
                    else if (!value.Value.IsWriteOnly())
                    {
                        copy[value.Key] = value.Value;
                    } 
                    else if (!allowWriteOnly)
                    { 
                        throw Fx.Exception.AsError(new InvalidOperationException(SRCore.LoadedWriteOnlyValue)); 
                    }
                    else 
                    {
                        copy.Remove(value.Key);
                    }
                } 
                return new ReadOnlyDictionary(copy, false);
            } 
            else 
            {
                return (ReadOnlyDictionary) existing; 
            }
        }
    }
} 

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

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