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//---------------------------------------------------------------------
// <copyright file="ObjectItemLoadingSessionData.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
using System.Reflection;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;
namespace System.Data.Metadata.Edm
{
internal sealed class ObjectItemLoadingSessionData
{
private Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader> _loaderFactory;
// all the types that we encountered while loading - this may contain types from various assemblies
private readonly Dictionary<string, EdmType> _typesInLoading;
//
private bool _conventionBasedRelationshipsAreLoaded = false;
private LoadMessageLogger _loadMessageLogger;
// list of errors encountered during loading
private readonly List<EdmItemError> _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<Assembly, MutableAssemblyCacheEntry> _listOfAssembliesLoaded = new Dictionary<Assembly, MutableAssemblyCacheEntry>();
// 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<ObjectItemAssemblyLoader> _loadersThatNeedLevel1PostSessionProcessing;
private readonly HashSet<ObjectItemAssemblyLoader> _loadersThatNeedLevel2PostSessionProcessing;
private readonly EdmItemCollection _edmItemCollection;
private Dictionary<string, KeyValuePair<EdmType, int>> _conventionCSpaceTypeNames;
private Dictionary<EdmType, EdmType> _cspaceToOspace;
private object _originalLoaderCookie;
internal Dictionary<string, EdmType> TypesInLoading { get { return _typesInLoading; } }
internal Dictionary<Assembly, MutableAssemblyCacheEntry> AssembliesLoaded { get { return _listOfAssembliesLoaded; } }
internal List<EdmItemError> EdmItemErrors { get { return _errors; } }
internal KnownAssembliesSet KnownAssemblies { get { return _knownAssemblies; } }
internal LockedAssemblyCache LockedAssemblyCache { get { return _lockedAssemblyCache; } }
internal EdmItemCollection EdmItemCollection { get { return _edmItemCollection; } }
internal Dictionary<EdmType, EdmType> 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<string, KeyValuePair<EdmType, int>> ConventionCSpaceTypeNames
{
get
{
if (_edmItemCollection != null && _conventionCSpaceTypeNames == null)
{
_conventionCSpaceTypeNames = new Dictionary<string, KeyValuePair<EdmType, int>>();
// create the map and cache it
foreach (var edmType in _edmItemCollection.GetItems<EdmType>())
{
if ((edmType is StructuralType && edmType.BuiltInTypeKind != BuiltInTypeKind.AssociationType) || Helper.IsEnumType(edmType))
{
KeyValuePair<EdmType, int> pair;
if (_conventionCSpaceTypeNames.TryGetValue(edmType.Name, out pair))
{
_conventionCSpaceTypeNames[edmType.Name] = new KeyValuePair<EdmType, int>(pair.Key, pair.Value + 1);
}
else
{
pair = new KeyValuePair<EdmType, int>(edmType, 1);
_conventionCSpaceTypeNames.Add(edmType.Name, pair);
}
}
}
}
return _conventionCSpaceTypeNames;
}
}
internal Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader> 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<String> logLoadMessage, object loaderCookie)
{
Debug.Assert(loaderCookie == null || loaderCookie is Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader>, "This is a bad loader cookie");
_typesInLoading = new Dictionary<string, EdmType>(StringComparer.Ordinal);
_errors = new List<EdmItemError>();
_knownAssemblies = knownAssemblies;
_lockedAssemblyCache = lockedAssemblyCache;
_loadersThatNeedLevel1PostSessionProcessing = new HashSet<ObjectItemAssemblyLoader>();
_loadersThatNeedLevel2PostSessionProcessing = new HashSet<ObjectItemAssemblyLoader>();
_edmItemCollection = edmItemCollection;
_loadMessageLogger = new LoadMessageLogger(logLoadMessage);
_cspaceToOspace = new Dictionary<EdmType, EdmType>();
_loaderFactory = (Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader>)loaderCookie;
_originalLoaderCookie = loaderCookie;
if (_loaderFactory == ObjectItemConventionAssemblyLoader.Create && _edmItemCollection != null)
{
foreach (KnownAssemblyEntry entry in _knownAssemblies.GetEntries(_loaderFactory, edmItemCollection))
{
foreach (EdmType type in entry.CacheEntry.TypesInAssembly.OfType<EdmType>())
{
if (Helper.IsEntityType(type))
{
ClrEntityType entityType = (ClrEntityType)type;
_cspaceToOspace.Add(_edmItemCollection.GetItem<StructuralType>(entityType.CSpaceTypeName), entityType);
}
else if (Helper.IsComplexType(type))
{
ClrComplexType complexType = (ClrComplexType)type;
_cspaceToOspace.Add(_edmItemCollection.GetItem<StructuralType>(complexType.CSpaceTypeName), complexType);
}
else if(Helper.IsEnumType(type))
{
ClrEnumType enumType = (ClrEnumType)type;
_cspaceToOspace.Add(_edmItemCollection.GetItem<EnumType>(enumType.CSpaceTypeName), enumType);
}
else
{
Debug.Assert(Helper.IsAssociationType(type));
_cspaceToOspace.Add(_edmItemCollection.GetItem<StructuralType>(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();
}
}
}
}
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