91 lines
3.1 KiB
C#
91 lines
3.1 KiB
C#
//---------------------------------------------------------------------
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// <copyright file="KnownAssembliesSet.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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//
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// @owner [....]
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// @backupOwner [....]
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//---------------------------------------------------------------------
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using System;
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using System.Linq;
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using System.Reflection;
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using System.Collections.Generic;
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using System.Diagnostics;
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namespace System.Data.Metadata.Edm
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{
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/// <summary>
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/// This class is responsible for keeping track of which assemblies we have already
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/// considered so we don't reconsider them again.
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///
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/// The current rules for an assembly to be "seen" is
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/// 1. It is already in our dictionary
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/// AND
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/// 1. We are in attribute loading mode
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/// OR
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/// 2. We have seen it already with a non null EdmItemCollection
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/// OR
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/// 3. We are seeing it with a null EdmItemCollection this time
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/// </summary>
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internal class KnownAssembliesSet
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{
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private Dictionary<Assembly, KnownAssemblyEntry> _assemblies;
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internal KnownAssembliesSet()
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{
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_assemblies = new Dictionary<Assembly, KnownAssemblyEntry>();
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}
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internal KnownAssembliesSet(KnownAssembliesSet set)
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{
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_assemblies = new Dictionary<Assembly, KnownAssemblyEntry>(set._assemblies);
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}
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internal bool TryGetKnownAssembly(Assembly assembly, object loaderCookie, EdmItemCollection itemCollection, out KnownAssemblyEntry entry)
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{
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if (!_assemblies.TryGetValue(assembly, out entry))
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{
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return false;
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}
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if (!entry.HaveSeenInCompatibleContext(loaderCookie, itemCollection))
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{
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return false;
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}
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return true;
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}
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internal IEnumerable<Assembly> Assemblies
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{
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get { return _assemblies.Keys; }
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}
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public IEnumerable<KnownAssemblyEntry> GetEntries(object loaderCookie, EdmItemCollection itemCollection)
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{
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return _assemblies.Values.Where(e => e.HaveSeenInCompatibleContext(loaderCookie, itemCollection));
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}
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internal bool Contains(Assembly assembly, object loaderCookie, EdmItemCollection itemCollection)
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{
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KnownAssemblyEntry entry;
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return TryGetKnownAssembly(assembly, loaderCookie, itemCollection, out entry);
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}
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internal void Add(Assembly assembly, KnownAssemblyEntry knownAssemblyEntry)
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{
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KnownAssemblyEntry current;
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if (_assemblies.TryGetValue(assembly, out current))
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{
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Debug.Assert(current.SeenWithEdmItemCollection != knownAssemblyEntry.SeenWithEdmItemCollection &&
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knownAssemblyEntry.SeenWithEdmItemCollection, "should only be updating if we haven't seen it with an edmItemCollection yet.");
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_assemblies[assembly] = knownAssemblyEntry;
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}
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else
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{
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_assemblies.Add(assembly, knownAssemblyEntry);
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}
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}
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}
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}
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