ProxyManager.cs source code in C# .NET

                        Code:
                         / WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / ComIntegration / ProxyManager.cs / 1 / ProxyManager.cs
                        
                        
                            //------------------------------------------------------------------------------ 
// Copyright (c) Microsoft Corporation.  All rights reserved.
//-----------------------------------------------------------------------------
namespace System.ServiceModel.ComIntegration
{ 
     using System;
     using System.ServiceModel.Channels; 
     using System.Runtime.InteropServices; 
     using System.Collections.Generic;
     using System.ServiceModel; 
     using System.Runtime.Remoting.Proxies;
     using System.Threading;

 

     internal class ProxyManager : IProxyManager 
     { 

          IProxyCreator proxyCreator; 
          internal ProxyManager (IProxyCreator proxyCreator)
          {
               this.proxyCreator = proxyCreator;
               InterfaceIDToComProxy = new Dictionary (); 
          }
          bool IsIntrinsic (ref Guid riid) 
          { 
               if ( (riid == typeof (IChannelOptions).GUID)
                    || 
                    (riid == typeof (IChannelCredentials).GUID)
                    )
                    return true;
               return false; 
          }
 
          void IProxyManager.TearDownChannels () 
          {
                lock (this) 
                {
                   IEnumerator  > enumeratorInterfaces = InterfaceIDToComProxy.GetEnumerator ();
                   while (enumeratorInterfaces.MoveNext ())
                   { 
                         KeyValuePair  current = enumeratorInterfaces.Current;
                         IDisposable comProxy = current.Value as IDisposable; 
                         if (comProxy == null) 
                             DiagnosticUtility.DebugAssert("comProxy should not be null");
                         else 
                            comProxy.Dispose ();
                   }
                   InterfaceIDToComProxy.Clear ();
                   proxyCreator.Dispose (); 
                   enumeratorInterfaces.Dispose ();
                   proxyCreator = null; 
               } 
           }
 
          Dictionary           InterfaceIDToComProxy ;


          ComProxy CreateServiceChannel  (IntPtr outerProxy, ref Guid riid) 
          {
                return proxyCreator.CreateProxy (outerProxy, ref riid); 
          } 

          ComProxy GenerateIntrinsic (IntPtr outerProxy, ref Guid riid) 
          {
               if (proxyCreator.SupportsIntrinsics ())
               {
                   if (riid == typeof (IChannelOptions).GUID) 
                       return ChannelOptions.Create (outerProxy, proxyCreator as IProvideChannelBuilderSettings) ;
                   else  if (riid == typeof (IChannelCredentials).GUID) 
                       return ChannelCredentials.Create (outerProxy, proxyCreator as IProvideChannelBuilderSettings) ; 
                   else
                   { 
                       DiagnosticUtility.DebugAssert("Given IID is not an intrinsic");

                       throw DiagnosticUtility.ExceptionUtility.ThrowHelperInternal(false);
                   } 
               }
               else 
               { 
                    DiagnosticUtility.DebugAssert("proxyCreator does not support intrinsic");
 
                    throw DiagnosticUtility.ExceptionUtility.ThrowHelperInternal(false);
               }
         }
 
         void FindOrCreateProxyInternal (IntPtr outerProxy, ref Guid riid, out ComProxy comProxy)
         { 
               comProxy = null; 
               lock (this)
               { 
                   InterfaceIDToComProxy.TryGetValue(riid, out comProxy);
                   if (comProxy == null)
                   {
                       if (IsIntrinsic(ref riid)) 
                           comProxy = GenerateIntrinsic(outerProxy, ref riid);
                       else 
                           comProxy = CreateServiceChannel(outerProxy, ref riid); 
                       InterfaceIDToComProxy[riid] = comProxy;
                   } 
               }
               if (comProxy == null)
               {
                   DiagnosticUtility.DebugAssert("comProxy should not be null at this point"); 

                   throw DiagnosticUtility.ExceptionUtility.ThrowHelperInternal(false); 
               } 
         }
 
         int IProxyManager.FindOrCreateProxy (IntPtr outerProxy, ref Guid riid, out IntPtr tearOff)
         {
              tearOff = IntPtr.Zero;
              try 
              {
                  ComProxy comProxy = null; 
                  FindOrCreateProxyInternal (outerProxy, ref riid, out comProxy); 
                  comProxy.QueryInterface (ref riid, out tearOff);
                  return HR.S_OK; 
              }
              catch (Exception e)
              {
                  if (DiagnosticUtility.IsFatal(e)) 
                      throw;
 
                  e = e.GetBaseException (); 
                  return Marshal.GetHRForException (e);
 
              }

         }
 
         int IProxyManager.InterfaceSupportsErrorInfo (ref Guid riid)
         { 
             if (IsIntrinsic (ref riid)) 
                return HR.S_OK;
             else 
                return proxyCreator.SupportsErrorInfo (ref riid) ? HR.S_OK : HR.S_FALSE;

         }
 
         void IProxyManager.GetIDsOfNames(
                         [MarshalAs(UnmanagedType.LPWStr)] string name, 
                         IntPtr  pDispID) 
         {
 
                Int32 dispID = -1;
                switch (name)
                {
                    case "ChannelOptions": 
                        dispID = 1;
                        break; 
                    case "ChannelCredentials": 
                        dispID = 2;
                        break; 
                }
                Marshal.WriteInt32 (pDispID, (int) dispID);
         }
         int IProxyManager.Invoke( 
                        UInt32 dispIdMember,
                        IntPtr outerProxy, 
                        IntPtr pVarResult, 
                        IntPtr pExcepInfo
 
                    )
         {

                try 
                {
 
                    ComProxy comProxy = null; 
                    Guid riid;
                    if ((dispIdMember == 1)) 
                        riid = typeof (IChannelOptions).GUID;
                    else if ((dispIdMember == 2))
                        riid = typeof (IChannelCredentials).GUID;
                    else 
                        return HR.DISP_E_MEMBERNOTFOUND;
                    FindOrCreateProxyInternal (outerProxy, ref riid, out comProxy); 
                    TagVariant variant = new  TagVariant (); 
                    variant.vt = (ushort)VarEnum.VT_DISPATCH;
                    IntPtr tearOffDispatch = IntPtr.Zero; 
                    comProxy.QueryInterface (ref riid, out tearOffDispatch);
                    variant.ptr = tearOffDispatch;
                    Marshal.StructureToPtr (variant, pVarResult, true);
                    return HR.S_OK; 
                }
                catch (Exception e) 
                { 
                    if (DiagnosticUtility.IsFatal(e))
                        throw; 

                    if (pExcepInfo != IntPtr.Zero)
                    {
                        System.Runtime.InteropServices.ComTypes.EXCEPINFO exceptionInfo = new System.Runtime.InteropServices.ComTypes.EXCEPINFO () ; 
                        e = e.GetBaseException ();
                        exceptionInfo.bstrDescription  = e.Message; 
                        exceptionInfo.bstrSource = e.Source; 
                        exceptionInfo.scode = Marshal.GetHRForException (e);
                        Marshal.StructureToPtr (exceptionInfo, pExcepInfo, false); 
                    }
                    return HR.DISP_E_EXCEPTION;
                }
         } 

         int IProxyManager.SupportsDispatch () 
         { 
            if (proxyCreator.SupportsDispatch ())
                return HR.S_OK; 
            else
                return HR.E_FAIL;
         }
 

     } 
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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