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//---------------------------------------------------------------------
// <copyright file="ObjectItemAssemblyLoader.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//
// @owner Microsoft
// @backupOwner Microsoft
//---------------------------------------------------------------------
namespace System.Data.Metadata.Edm
{
using System.Collections.Generic;
using System.Data.Entity;
using System.Diagnostics;
using System.Reflection;
internal abstract class ObjectItemAssemblyLoader
{
protected const BindingFlags PropertyReflectionBindingFlags = BindingFlags.DeclaredOnly |
BindingFlags.Instance |
BindingFlags.Public |
BindingFlags.NonPublic;
private readonly ObjectItemLoadingSessionData _sessionData;
private Assembly _assembly;
private AssemblyCacheEntry _cacheEntry;
protected ObjectItemAssemblyLoader(Assembly assembly, AssemblyCacheEntry cacheEntry, ObjectItemLoadingSessionData sessionData)
{
_assembly = assembly;
_cacheEntry = cacheEntry;
_sessionData = sessionData;
}
internal virtual void Load()
{
AddToAssembliesLoaded();
LoadTypesFromAssembly();
AddToKnownAssemblies();
LoadClosureAssemblies();
}
protected abstract void AddToAssembliesLoaded();
protected abstract void LoadTypesFromAssembly();
protected virtual void LoadClosureAssemblies()
{
LoadAssemblies(CacheEntry.ClosureAssemblies, SessionData);
}
internal virtual void OnLevel1SessionProcessing() { }
internal virtual void OnLevel2SessionProcessing() { }
internal static ObjectItemAssemblyLoader CreateLoader(Assembly assembly, ObjectItemLoadingSessionData sessionData)
{
ImmutableAssemblyCacheEntry cacheEntry;
// KnownAssembly -> NoOp
// Inside the LockedAssemblyCache means it is an attribute based assembly -> Cachedassembly
// Inside the OcCache on EdmItemCollection -> cachedassembly
// If none of above, setup the LoaderFactory based on the current assembly and EdmItemCollection
if (sessionData.KnownAssemblies.Contains(assembly, sessionData.ObjectItemAssemblyLoaderFactory, sessionData.EdmItemCollection))
{
return new ObjectItemNoOpAssemblyLoader(assembly, sessionData);
}
else if (sessionData.LockedAssemblyCache.TryGetValue(assembly, out cacheEntry))
{
if (sessionData.ObjectItemAssemblyLoaderFactory == null)
{
if (cacheEntry.TypesInAssembly.Count != 0)
{
// we are loading based on attributes now
sessionData.ObjectItemAssemblyLoaderFactory = ObjectItemAttributeAssemblyLoader.Create;
}
// if types in assembly are 0, don't commit to any loader yet
}
else if (sessionData.ObjectItemAssemblyLoaderFactory != ObjectItemAttributeAssemblyLoader.Create)
{
// we were loading in convention mode, and ran into an assembly that can't be loaded by convention
// we know this because all cached assemblies are attribute based at the moment.
sessionData.EdmItemErrors.Add(new EdmItemError(Strings.Validator_OSpace_Convention_AttributeAssemblyReferenced(assembly.FullName), null));
}
return new ObjectItemCachedAssemblyLoader(assembly, cacheEntry, sessionData);
}
else if (sessionData.EdmItemCollection != null &&
sessionData.EdmItemCollection.ConventionalOcCache.TryGetConventionalOcCacheFromAssemblyCache(
assembly, out cacheEntry))
{
sessionData.ObjectItemAssemblyLoaderFactory = ObjectItemConventionAssemblyLoader.Create;
return new ObjectItemCachedAssemblyLoader(assembly, cacheEntry, sessionData);
}
else if (sessionData.ObjectItemAssemblyLoaderFactory == null)
{
if (ObjectItemAttributeAssemblyLoader.IsSchemaAttributePresent(assembly))
{
sessionData.ObjectItemAssemblyLoaderFactory = ObjectItemAttributeAssemblyLoader.Create;
}
else if (ObjectItemConventionAssemblyLoader.SessionContainsConventionParameters(sessionData))
{
sessionData.ObjectItemAssemblyLoaderFactory = ObjectItemConventionAssemblyLoader.Create;
}
}
if (sessionData.ObjectItemAssemblyLoaderFactory != null)
{
return sessionData.ObjectItemAssemblyLoaderFactory(assembly, sessionData);
}
return new ObjectItemNoOpAssemblyLoader(assembly, sessionData);
}
internal static bool IsAttributeLoader(object loaderCookie)
{
Debug.Assert(loaderCookie == null || loaderCookie is Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader>, "Non loader cookie passed in");
return IsAttributeLoader(loaderCookie as Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader>);
}
internal static bool IsAttributeLoader(Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader> loaderFactory)
{
if (loaderFactory == null)
{
return false;
}
return loaderFactory == ObjectItemAttributeAssemblyLoader.Create;
}
internal static bool IsConventionLoader(Func<Assembly, ObjectItemLoadingSessionData, ObjectItemAssemblyLoader> loaderFactory)
{
if (loaderFactory == null)
{
return false;
}
return loaderFactory == ObjectItemConventionAssemblyLoader.Create;
}
protected virtual void AddToKnownAssemblies()
{
Debug.Assert(!_sessionData.KnownAssemblies.Contains(_assembly, SessionData.ObjectItemAssemblyLoaderFactory, _sessionData.EdmItemCollection), "This assembly must not be present in the list of known assemblies");
_sessionData.KnownAssemblies.Add(_assembly, new KnownAssemblyEntry(CacheEntry, SessionData.EdmItemCollection != null));
}
protected static void LoadAssemblies(IEnumerable<Assembly> assemblies, ObjectItemLoadingSessionData sessionData)
{
foreach (Assembly assembly in assemblies)
{
ObjectItemAssemblyLoader loader = ObjectItemAssemblyLoader.CreateLoader(assembly, sessionData);
loader.Load();
}
}
protected bool TryGetPrimitiveType(Type type, out PrimitiveType primitiveType)
{
return ClrProviderManifest.Instance.TryGetPrimitiveType(Nullable.GetUnderlyingType(type) ?? type, out primitiveType);
}
protected ObjectItemLoadingSessionData SessionData { get { return _sessionData; } }
protected Assembly SourceAssembly { get { return _assembly; } }
protected AssemblyCacheEntry CacheEntry { get { return _cacheEntry; } }
}
}
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