mDNSWindows/Applications/ExplorerPlugin/ClassFactory.cpp

   1 /*
   2  * Copyright (c) 2003-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24
  25     Change History (most recent first):
  26
  27 $Log: ClassFactory.cpp,v $
  28 Revision 1.1  2004/01/30 03:01:56  bradley
  29 Explorer Plugin to browse for Rendezvous-enabled Web and FTP servers from within Internet Explorer.
  30
  31 */
  32
  33 #include        "StdAfx.h"
  34
  35 #include        "DebugServices.h"
  36
  37 #include        "ExplorerBar.h"
  38 #include        "ExplorerPlugin.h"
  39
  40 #include        "ClassFactory.h"
  41
  42 // MFC Debugging
  43
  44 #ifdef _DEBUG
  45 #define new DEBUG_NEW
  46 #undef THIS_FILE
  47 static char THIS_FILE[] = __FILE__;
  48 #endif
  49
  50 //===========================================================================================================================
  51 //      ClassFactory
  52 //===========================================================================================================================
  53
  54 ClassFactory::ClassFactory( CLSID inCLSID )
  55 {
  56         mCLSIDObject    = inCLSID;
  57         mRefCount               = 1;
  58         ++gDLLRefCount;
  59 }
  60
  61 //===========================================================================================================================
  62 //      ~ClassFactory
  63 //===========================================================================================================================
  64
  65 ClassFactory::~ClassFactory( void )
  66 {
  67         check( gDLLRefCount > 0 );
  68
  69         --gDLLRefCount;
  70 }
  71
  72 #if 0
  73 #pragma mark -
  74 #pragma mark == IUnknown methods ==
  75 #endif
  76
  77 //===========================================================================================================================
  78 //      QueryInterface
  79 //===========================================================================================================================
  80
  81 STDMETHODIMP    ClassFactory::QueryInterface( REFIID inID, LPVOID *outResult )
  82 {
  83         HRESULT         err;
  84
  85         check( outResult );
  86
  87         if( IsEqualIID( inID, IID_IUnknown ) )
  88         {
  89                 *outResult = this;
  90         }
  91         else if( IsEqualIID( inID, IID_IClassFactory ) )
  92         {
  93                 *outResult = (IClassFactory *) this;
  94         }
  95         else
  96         {
  97                 *outResult = NULL;
  98                 err = E_NOINTERFACE;
  99                 goto exit;
 100         }
 101
 102         ( *( (LPUNKNOWN *) outResult ) )->AddRef();
 103         err = S_OK;
 104
 105 exit:
 106         return( err );
 107 }
 108
 109 //===========================================================================================================================
 110 //      AddRef
 111 //===========================================================================================================================
 112
 113 STDMETHODIMP_( DWORD )  ClassFactory::AddRef( void )
 114 {
 115         return( ++mRefCount );
 116 }
 117
 118 //===========================================================================================================================
 119 //      Release
 120 //===========================================================================================================================
 121
 122 STDMETHODIMP_( DWORD )  ClassFactory::Release( void )
 123 {
 124         DWORD           count;
 125
 126         count = --mRefCount;
 127         if( count == 0 )
 128         {
 129                 delete this;
 130         }
 131         return( count );
 132 }
 133
 134 #if 0
 135 #pragma mark -
 136 #pragma mark == IClassFactory methods ==
 137 #endif
 138
 139 //===========================================================================================================================
 140 //      CreateInstance
 141 //===========================================================================================================================
 142
 143 STDMETHODIMP    ClassFactory::CreateInstance( LPUNKNOWN inUnknown, REFIID inID, LPVOID *outObject )
 144 {
 145         HRESULT         err;
 146         LPVOID          obj;
 147
 148         check( outObject );
 149
 150         obj             = NULL;
 151         *outObject      = NULL;
 152         require_action( !inUnknown, exit, err = CLASS_E_NOAGGREGATION );
 153
 154         // Create the object based on the CLSID.
 155
 156         if( IsEqualCLSID( mCLSIDObject, CLSID_ExplorerBar ) )
 157         {
 158                 try
 159                 {
 160                         obj = new ExplorerBar();
 161                 }
 162                 catch( ... )
 163                 {
 164                         // Don't let exception escape.
 165                 }
 166                 require_action( obj, exit, err = E_OUTOFMEMORY );
 167         }
 168         else
 169         {
 170                 err = E_FAIL;
 171                 goto exit;
 172         }
 173
 174         // Query for the specified interface. Release the factory since QueryInterface retains it.
 175
 176         err = ( (LPUNKNOWN ) obj )->QueryInterface( inID, outObject );
 177         ( (LPUNKNOWN ) obj )->Release();
 178
 179 exit:
 180         return( err );
 181 }
 182
 183 //===========================================================================================================================
 184 //      LockServer
 185 //===========================================================================================================================
 186
 187 STDMETHODIMP    ClassFactory::LockServer( BOOL inLock )
 188 {
 189         DEBUG_UNUSED( inLock );
 190
 191         return( E_NOTIMPL );
 192 }