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<concept id="GUID-D72A47FE-23D2-4AD1-92B9-53DD9B64733F-GENID-1-12-1-19-1-1-7-1-6-1-5-1-5-1-4-1-5-1" xml:lang="en"><title>Creating

a Notifier ECOM Plug-in</title><shortdesc>To use the Privacy Query and Notification API to create a notifier

a licensee must secondly create a notifier ECOM plug-in.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>

<section>       <title>Exporting a factory method </title>       <p>The notifier

is implemented as an ECOM plug-in and has typical ECOM entry point methods.

The following code example shows how the <xref href="GUID-56C8D5AB-7D9A-3B20-B699-07F17A87A61C.dita#GUID-56C8D5AB-7D9A-3B20-B699-07F17A87A61C/GUID-38E7BBCF-8F4C-3398-B322-2D3427E4CAC1"><apiname>CPosPrivacyNotifier::NotifierBase(</apiname></xref>)

method is used to return the <codeph>MEikSrvNotifierBase2</codeph> pointer

required by the Extended Notifier Framework.     </p><p>The UID specified

in <codeph>IMPLEMENTATION_PROXY_ENTRY</codeph> is the constant <codeph>KPosPrivacyNotifierImplUid</codeph> as

defined in <filepath>EPos_PrivacyNotifier.hrh</filepath>.  </p>     <codeblock xml:space="preserve">#include &lt;e32base.h&gt;

#include <eiknotapi.h>

#include <ImplementationProxy.h>

#include <EPos_PrivacyNotifier.hrh>

#include "CMyPrivacyNotifier.h"

// Creates the notifier. Used by the NotifierArray() factory method.

LOCAL_C void CreateNotifiersL(CArrayPtrFlat<MEikSrvNotifierBase2>* aNotifiers)

    {

    CMyPrivacyNotifier* notifier = CMyPrivacyNotifier::NewLC();

    aNotifiers->AppendL(notifier->NotifierBase());

    CleanupStack::Pop(notifier); // Do not destroy

    }

// Notifier entry point. Note that the factory method must not leave

LOCAL_C CArrayPtr<MEikSrvNotifierBase2>* NotifierArray()

    {

    CArrayPtrFlat<MEikSrvNotifierBase2>* notifiers =

        new CArrayPtrFlat<MEikSrvNotifierBase2>(1);

    if (notifiers)

        {

        TRAPD(err, CreateNotifiersL(notifiers));

        if (err)

            { // release any notifiers we have created

            TInt count = notifiers->Count();

            while (--count >= 0)

                {

                (*notifiers)[count]->Release();

                }

            delete notifiers;

            notifiers = NULL;

            }

        }

    return notifiers;

    }

const TImplementationProxy KPosImplTable[] =

    {

    IMPLEMENTATION_PROXY_ENTRY(KPosPrivacyNotifierImplUid, NotifierArray)

    };

EXPORT_C const TImplementationProxy* ImplementationGroupProxy(TInt& aTableCount)

    {

    aTableCount = sizeof(KPosImplTable) / sizeof(TImplementationProxy);

    return KPosImplTable;

    }</codeblock></section>

<section><title>Defining the ECOM resource file</title><p>The following is

an example ECOM resource file for a Privacy Q&amp;N Notifier: </p><codeblock xml:space="preserve">#include &lt;RegistryInfo.rh&gt;

#include <Uikon.hrh>

#include <EPos_PrivacyNotifier.hrh>

// RESOURCE DEFINITIONS

// -----------------------------------------------------------------------------

//

// r_registry

// ECOM registry information for Privacy UI

//

// -----------------------------------------------------------------------------

//

RESOURCE REGISTRY_INFO r_registry

    {

    dll_uid = 0x01234123;

    interfaces =

        {

        INTERFACE_INFO

            {

            interface_uid = KUikonUidPluginInterfaceNotifiers;

            implementations =

                {

                IMPLEMENTATION_INFO

                    {

                    implementation_uid = KPosPrivacyNotifierImplUid;

                    version_no = 1;

                    display_name = "Privacy UI";

                    }

                };

            }

        };

    }</codeblock><p>The most important points about this file are: </p><ul>

<li><p>dll_uid is the UID of the notifier DLL. This should be the same as

specified in the MMP file (see below). </p></li>

<li><p>interface_uid is the UID of the <codeph>MEikSrvNotifierBase2</codeph> interface.

This should be set to the constant <codeph>KUikonUidPluginInterfaceNotifiers</codeph> defined

in <filepath>Uikon.hrh</filepath>. </p></li>

<li><p>implementation_uid is the notifier implementation UID. This UID is

defined as the constant <codeph>KPosPrivacyNotifierImplUid</codeph> in <filepath>EPos_PrivacyNotifier.hrh</filepath>.</p></li>

</ul></section>

<section><title>Defining the MMP file </title><p>The following is an example

MMP file for a Privacy Q&amp;N Notifier:</p><codeblock xml:space="preserve">TARGET          myprivnot.dll

TARGETTYPE      PLUGIN

UID             0x10009D8D 0x01234123 // Notifier type uid = 0x10009D8D

VENDORID        VID_DEFAULTCAPABILITY      ProtServ TrustedUI

SOURCEPATH      ..\src

SOURCE          MyPrivacyNotifierMain.cpp

SOURCE          CMyPrivacyNotifier.cpp

START RESOURCE  PrivacyNotifier.rss

TARGET          myprivnot.rsc

END

SYSTEMINCLUDE   \Epoc32\Include

SYSTEMINCLUDE   \Epoc32\Include\ECom

SYSTEMINCLUDE   \Epoc32\Include\lbs

LIBRARY         euser.lib

LIBRARY         eposprvqnif.lib

LIBRARY         eposprvtyp.lib

LIBRARY         bafl.lib

</codeblock><p>The most important points about this file are:</p><ul>

<li><p>The target type is <codeph>PLUGIN</codeph> because the notifier is

implemented as an ECOM plug-in.</p></li>

<li><p>The second UID is <codeph>0x10009D8D</codeph> to identify the DLL as

an ECOM plug-in.</p></li>

<li><p>The third UID is the DLL UID and is allocated by Symbian. Note that

this is not the same as the implementation UID specified in the ECOM resource

file. </p></li>

<li><p><filepath>\epoc32\include\lbs</filepath> is included in order to find

the Privacy Query and Notification API header files. </p></li>

<li><p><filepath>eposprvqnif.lib</filepath> is included to link against the

Privacy Query and Notification API library. </p></li>

<li><p>The notifier must have the <codeph>ProtServ</codeph> and <codeph>TrustedUI</codeph> capabilities

as required by the Extended Notifier Framework. </p></li>

</ul></section>

</conbody></concept>