shared source/wpf/src/host/shimimpl/versionfactory.hxx

   1 //------------------------------------------------------------------------
   2 //
   3 //  Copyright (c) Microsoft Corporation.  All rights reserved.
   4 //
   5 //  Description:
   6 //     Defines a factory for CVersion objects
   7 //
   8 // History:
   9 //      2005/06/20 - [....]
  10 //          Created
  11 //      2007/09/20-[....]
  12 //          Ported Windows->DevDiv. See SourcesHistory.txt.
  13 //
  14 //------------------------------------------------------------------------
  15
  16 #pragma once
  17
  18 /*
  19
  20 This is where our Avalon policy is implemented. Given a requested version
  21 of Avalon, we need to decide which version of Avalon we are actually going
  22 to run.
  23
  24 The currently implemented policy is as follows:
  25
  26 For applications:
  27
  28     if the requested version is available, use it
  29     else return the latest version
  30
  31 For containers
  32
  33     always run the latest version
  34
  35 Note that this is just the Avalon version; the CLR version will be exactly
  36 specified by PresentationHostDLL.dll
  37
  38 */
  39
  40 #include "Precompiled.hxx"
  41 #include "..\shared\StringMap.hxx"
  42
  43 class CVersionFactory
  44 {
  45 public:
  46     static int GetCount();
  47     static CVersion* GetVersion(__in_ecount(1) LPCWSTR pwzRequestedVersion, BOOL bDefaultToLatest = TRUE);
  48     static CVersion* GetLatestVersion();
  49
  50 private:
  51     static HRESULT EnsureVersionList();
  52
  53 private:
  54     static CStringMap<CVersion*>*   m_pVersions;
  55     static CVersion*                m_pLatestVersion;
  56 };