KnownAssembliesSet.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 / fx / src / DataEntity / System / Data / Metadata / ObjectLayer / KnownAssembliesSet.cs / 1305376 / KnownAssembliesSet.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner       [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

using System; 
using System.Linq;
using System.Reflection;
using System.Collections.Generic;
using System.Diagnostics; 

namespace System.Data.Metadata.Edm 
{ 
    /// 
    /// This class is responsible for keeping track of which assemblies we have already 
    /// considered so we don't reconsider them again.
    ///
    /// The current rules for an assembly to be "seen" is
    ///     1. It is already in our dictionary 
    ///     AND
    ///         1.  We are in attribute loading mode 
    ///         OR 
    ///         2. We have seen it already with a non null EdmItemCollection
    ///         OR 
    ///         3. We are seeing it with a null EdmItemCollection this time
    /// 
    internal class KnownAssembliesSet
    { 
        private Dictionary _assemblies;
        internal KnownAssembliesSet() 
        { 
            _assemblies = new Dictionary();
        } 

        internal KnownAssembliesSet(KnownAssembliesSet set)
        {
            _assemblies = new Dictionary(set._assemblies); 
        }
 
        internal bool TryGetKnownAssembly(Assembly assembly, object loaderCookie, EdmItemCollection itemCollection, out KnownAssemblyEntry entry) 
        {
            if (!_assemblies.TryGetValue(assembly, out entry)) 
            {
                return false;
            }
 
            if (!entry.HaveSeenInCompatibleContext(loaderCookie, itemCollection))
            { 
                return false; 
            }
 
            return true;
        }

        internal IEnumerable Assemblies 
        {
            get { return _assemblies.Keys; } 
        } 

        public IEnumerable GetEntries(object loaderCookie, EdmItemCollection itemCollection) 
        {
            return _assemblies.Values.Where(e => e.HaveSeenInCompatibleContext(loaderCookie, itemCollection));
        }
 
        internal bool Contains(Assembly assembly, object loaderCookie, EdmItemCollection itemCollection)
        { 
            KnownAssemblyEntry entry; 
            return TryGetKnownAssembly(assembly, loaderCookie, itemCollection, out entry);
        } 

        internal void Add(Assembly assembly, KnownAssemblyEntry knownAssemblyEntry)
        {
            KnownAssemblyEntry current; 
            if (_assemblies.TryGetValue(assembly, out current))
            { 
                Debug.Assert(current.SeenWithEdmItemCollection != knownAssemblyEntry.SeenWithEdmItemCollection && 
                    knownAssemblyEntry.SeenWithEdmItemCollection, "should only be updating if we haven't seen it with an edmItemCollection yet.");
                _assemblies[assembly] = knownAssemblyEntry; 
            }
            else
            {
                _assemblies.Add(assembly, knownAssemblyEntry); 
            }
        } 
    } 
}

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

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