ObjectItemLoadingSessionData.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Metadata / ObjectLayer / ObjectItemLoadingSessionData.cs / 1305376 / ObjectItemLoadingSessionData.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 
using System.Reflection;
using System.Linq; 
using System.Collections.Generic;
using System.Diagnostics;

namespace System.Data.Metadata.Edm 
{
    internal sealed class ObjectItemLoadingSessionData 
    { 
        private Func _loaderFactory;
 
        // all the types that we encountered while loading - this may contain types from various assemblies
        private readonly Dictionary _typesInLoading;

        // 

        private bool _conventionBasedRelationshipsAreLoaded = false; 
 
        private LoadMessageLogger _loadMessageLogger;
 
        // list of errors encountered during loading
        private readonly List _errors;

        // keep the list of new assemblies that got loaded in this load assembly call. The reason why we need to keep a seperate 
        // list of assemblies is that we keep track of errors, and if there are no errors, only then do we add the list of assemblies
        // to the global cache. Hence global cache is never polluted with invalid assemblies 
        private readonly Dictionary _listOfAssembliesLoaded = new Dictionary(); 

        // List of known assemblies - this list is initially passed by the caller and we keep adding to it, as and when we load 
        // an assembly
        private readonly KnownAssembliesSet _knownAssemblies;
        private readonly LockedAssemblyCache _lockedAssemblyCache;
        private readonly HashSet _loadersThatNeedLevel1PostSessionProcessing; 
        private readonly HashSet _loadersThatNeedLevel2PostSessionProcessing;
 
        private readonly EdmItemCollection _edmItemCollection; 
        private Dictionary> _conventionCSpaceTypeNames;
        private Dictionary _cspaceToOspace; 
        private object _originalLoaderCookie;
        internal Dictionary TypesInLoading { get { return _typesInLoading; } }
        internal Dictionary AssembliesLoaded { get { return _listOfAssembliesLoaded; } }
        internal List EdmItemErrors { get { return _errors; } } 
        internal KnownAssembliesSet KnownAssemblies { get { return _knownAssemblies; } }
        internal LockedAssemblyCache LockedAssemblyCache { get { return _lockedAssemblyCache; } } 
        internal EdmItemCollection EdmItemCollection { get { return _edmItemCollection; } } 
        internal Dictionary CspaceToOspace{ get { return _cspaceToOspace; } }
        internal bool ConventionBasedRelationshipsAreLoaded 
        {
            get { return _conventionBasedRelationshipsAreLoaded;  }
            set { _conventionBasedRelationshipsAreLoaded = value; }
        } 

        internal LoadMessageLogger LoadMessageLogger 
        { 
            get
            { 
                return this._loadMessageLogger;
            }
        }
 
        // dictionary of types by name (not including namespace), we also track duplicate names
        // so if one of those types is used we can log an error 
        internal Dictionary> ConventionCSpaceTypeNames 
        {
            get 
            {
                if (_edmItemCollection != null && _conventionCSpaceTypeNames == null)
                {
                    _conventionCSpaceTypeNames = new Dictionary>(); 

                    // create the map and cache it 
                    foreach (var structuralType in _edmItemCollection.GetItems().Where(item => item.BuiltInTypeKind != BuiltInTypeKind.AssociationType)) 
                    {
                        KeyValuePair pair; 
                        if (_conventionCSpaceTypeNames.TryGetValue(structuralType.Name, out pair))
                        {
                            _conventionCSpaceTypeNames[structuralType.Name] = new KeyValuePair(pair.Key, pair.Value + 1);
                        } 
                        else
                        { 
                            pair = new KeyValuePair(structuralType, 1); 
                            _conventionCSpaceTypeNames.Add(structuralType.Name, pair);
                        } 
                    }
                }
                return _conventionCSpaceTypeNames;
            } 
        }
 
        internal Func ObjectItemAssemblyLoaderFactory 
        {
            get { return _loaderFactory; } 
            set
            {
                if (_loaderFactory != value)
                { 
                    Debug.Assert(_loaderFactory == null || _typesInLoading.Count == 0, "Only reset the factory after types have not been loaded or load from the cache");
                    _loaderFactory = value; 
                } 
            }
        } 

        internal object LoaderCookie
        {
            get 
            {
                // be sure we get the same factory/cookie as we had before... if we had one 
                if (_originalLoaderCookie != null) 
                {
                    Debug.Assert(_loaderFactory == null || 
                                 (object)_loaderFactory == _originalLoaderCookie, "The loader factory should determine the next loader, so we should always have the same loader factory");
                    return _originalLoaderCookie;
                }
 
                return _loaderFactory;
            } 
        } 
        internal ObjectItemLoadingSessionData(KnownAssembliesSet knownAssemblies, LockedAssemblyCache lockedAssemblyCache, EdmItemCollection edmItemCollection, Action logLoadMessage, object loaderCookie)
        { 
            Debug.Assert(loaderCookie == null || loaderCookie is Func, "This is a bad loader cookie");

            _typesInLoading = new Dictionary(StringComparer.Ordinal);
            _errors = new List(); 
            _knownAssemblies = knownAssemblies;
            _lockedAssemblyCache = lockedAssemblyCache; 
            _loadersThatNeedLevel1PostSessionProcessing = new HashSet(); 
            _loadersThatNeedLevel2PostSessionProcessing = new HashSet();
            _edmItemCollection = edmItemCollection; 
            _loadMessageLogger = new LoadMessageLogger(logLoadMessage);
            _cspaceToOspace = new Dictionary();
            _loaderFactory = (Func)loaderCookie;
            _originalLoaderCookie = loaderCookie; 
            if (_loaderFactory == ObjectItemConventionAssemblyLoader.Create && _edmItemCollection != null)
            { 
                foreach (KnownAssemblyEntry entry in _knownAssemblies.GetEntries(_loaderFactory, edmItemCollection)) 
                {
                    foreach (StructuralType type in entry.CacheEntry.TypesInAssembly.OfType()) 
                    {
                        if (Helper.IsEntityType(type))
                        {
                            ClrEntityType entityType = (ClrEntityType)type; 
                            _cspaceToOspace.Add(_edmItemCollection.GetItem(entityType.CSpaceTypeName), entityType);
                        } 
                        else if (Helper.IsComplexType(type)) 
                        {
                            ClrComplexType complexType = (ClrComplexType)type; 
                            _cspaceToOspace.Add(_edmItemCollection.GetItem(complexType.CSpaceTypeName), complexType);
                        }
                        else
                        { 
                            Debug.Assert(Helper.IsAssociationType(type));
                            _cspaceToOspace.Add(_edmItemCollection.GetItem(type.FullName), type); 
                        } 
                    }
                } 
            }

        }
 
        internal void RegisterForLevel1PostSessionProcessing(ObjectItemAssemblyLoader loader)
        { 
            _loadersThatNeedLevel1PostSessionProcessing.Add(loader); 
        }
 
        internal void RegisterForLevel2PostSessionProcessing(ObjectItemAssemblyLoader loader)
        {
            _loadersThatNeedLevel2PostSessionProcessing.Add(loader);
        } 

        internal void CompleteSession() 
        { 
            foreach (ObjectItemAssemblyLoader loader in _loadersThatNeedLevel1PostSessionProcessing)
            { 
                loader.OnLevel1SessionProcessing();
            }

            foreach (ObjectItemAssemblyLoader loader in _loadersThatNeedLevel2PostSessionProcessing) 
            {
                loader.OnLevel2SessionProcessing(); 
            } 
        }
    } 
}

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