1 <?xml version="1.0" encoding="utf-8"?>

     2 <!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->

     3 <!-- This component and the accompanying materials are made available under the terms of the License 

     4 "Eclipse Public License v1.0" which accompanies this distribution, 

     5 and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->

     6 <!-- Initial Contributors:

     7     Nokia Corporation - initial contribution.

     8 Contributors: 

     9 -->

    10 <!DOCTYPE task

    11   PUBLIC "-//OASIS//DTD DITA Task//EN" "task.dtd">

    12 <task id="GUID-7F4692A0-1801-5D91-8F28-06075AC45DE2" xml:lang="en"><title>Filtering

    13 Implementations by Vendor ID </title><shortdesc>The Plug-in framework clients can be restricted to use plug-ins

    14 supplied by a particular company. This enables to enhance security and improve

    15 functionality of the framework. </shortdesc><prolog><metadata><keywords/></metadata></prolog><taskbody>

    16 <context><p>Platform security provides a mechanism to mark the plug-ins with

    17 a vendor identifier by using the <codeph>vendorid</codeph> keyword in the <xref href="GUID-641A276D-F618-50CE-BA5A-658DCC26BAB5.dita">project file</xref>. This

    18 information is used for plug-in selection. </p><p>To filter implementations

    19 by vendor id there is no need to use the <codeph>TEComResolverParams</codeph> object.

    20 Instead, follow the steps described below: </p> </context>

    21 <steps id="GUID-C7923C51-397D-5E3B-B47C-F19AD21743FF">

    22 <step id="GUID-7E2CAE34-C937-50E7-BA83-44CB02E95A1A"><cmd/>

    23 <info>Retrieve the list of available implementations of an interface using <xref href="GUID-1344F049-81C4-3D17-AF46-8B5584680ADB.dita#GUID-1344F049-81C4-3D17-AF46-8B5584680ADB/GUID-AE9D4F24-8554-3151-AAF3-D63F400821C4"><apiname>REComSession::ListImplementationsL()</apiname></xref>. </info>

    24 </step>

    25 <step id="GUID-82D683A5-7BE6-5E4D-9686-30869F71E617"><cmd/>

    26 <info>Retrieve the vendor ID of the implementation, using <xref href="GUID-3107B19B-0607-3E9E-AEA5-BAD07EEC59D0.dita#GUID-3107B19B-0607-3E9E-AEA5-BAD07EEC59D0/GUID-372E7F18-EAA3-3B85-950D-72E3C09072C8"><apiname>      

    27           CImplementationInformation::VendorId()</apiname></xref>. </info>

    28 <info>If the matching vendor ID is returned, use the plug-in as required. </info>

    29 </step>

    30 </steps>

    31 <example id="GUID-F6140DF5-515F-5C42-B905-E8BC64380410"><title>Filtering implementations

    32 by vendor ID example</title> <codeblock id="GUID-21D942BD-CDC5-5976-A760-2607A1D88F7F" xml:space="preserve">// Specify interface for which to get implementations

    33 TUid interfaceUid={0111111111};

    34 RImplInfoPtrArray implArray;

    35 // get list of implementations into the array

    36 REComSession::ListImplementationsL(interfaceUid, implArray);

    37 

    38 // loop through implementations

    39 TInt implCount = implArray.Count();

    40 for(TInt count = 0; count < implCount; count++)

    41   {

    42   // read vendor ID

    43   const CImplementationInformation* implInfo = implArray[count];

    44   TVendorId vid = implInfo->VendorId();

    45 

    46    . . .

    47 

    48   }

    49 

    50    . . .

    51 

    52 implArray.ResetAndDestroy();

    53 REComSession::FinalClose();</codeblock> </example>

    54 </taskbody></task>