Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_write_to_embedded_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582

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<h1>examples/SysLibs/Streams/WriteToEmbedded/WriteToEmbedded.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2000-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
<a name="l00004"></a>00004 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
<a name="l00006"></a>00006 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Description:</span>
<a name="l00014"></a>00014 <span class="comment">// Example uses an embedded store.</span>
<a name="l00015"></a>00015 <span class="comment">// This example uses a permanent file store. It constructs a CMainClass object</span>
<a name="l00016"></a>00016 <span class="comment">// which has a CClassABC object as a component. The CClassABC object itself</span>
<a name="l00017"></a>00017 <span class="comment">// has other components and its structure is the same as found in the</span>
<a name="l00018"></a>00018 <span class="comment">// WriteToMany example.</span>
<a name="l00019"></a>00019 <span class="comment">// Here, the CClassABC component object network is stored in an embedded store.</span>
<a name="l00020"></a>00020 <span class="comment">// The example:</span>
<a name="l00021"></a>00021 <span class="comment">// creates a permanent file store</span>
<a name="l00022"></a>00022 <span class="comment">// constructs a CMainClass object. This results in the construction</span>
<a name="l00023"></a>00023 <span class="comment">// of a CClassABC objet network which is stored in its own embedded</span>
<a name="l00024"></a>00024 <span class="comment">// store (within the main store). </span>
<a name="l00025"></a>00025 <span class="comment">// stores the CMainClass object in its own stream in the main store</span>
<a name="l00026"></a>00026 <span class="comment">// and makes that stream the root stream.</span>
<a name="l00027"></a>00027 <span class="comment">// closes the store and deletes the CMainClass object from memory</span>
<a name="l00028"></a>00028 <span class="comment">// re-opens the permanent file store</span>
<a name="l00029"></a>00029 <span class="comment">// restores the CMainClass object and opens the embedded store. As the </span>
<a name="l00030"></a>00030 <span class="comment">// the contained CClassABC object itself has components which are only </span>
<a name="l00031"></a>00031 <span class="comment">// loaded in when needed, then the embedded store is kept open.</span>
<a name="l00032"></a>00032 <span class="comment">// Displays the content of the CClassA, CClassB and CClassC objects.</span>
<a name="l00033"></a>00033 <span class="comment">// Deletes the CClassABC object from CMainClass and deletes its representation</span>
<a name="l00034"></a>00034 <span class="comment">// from the permanent file store. Note that knowledge of the detailed</span>
<a name="l00035"></a>00035 <span class="comment">// structure of the CClassABC object network is not needed. </span>
<a name="l00036"></a>00036 <span class="comment">// Attempts to redisplay the content of the CClassA, CClassB and CClassC </span>
<a name="l00037"></a>00037 <span class="comment">// objects; this should fail as they have been deleted.</span>
<a name="l00038"></a>00038 <span class="comment">// closes the store and deletes the CMainClass object from memory.</span>
<a name="l00039"></a>00039 <span class="comment">// Notes:</span>
<a name="l00040"></a>00040 <span class="comment">// The file name and extension of the direct file store is &quot;WriteToEmbedded.dat&quot;.</span>
<a name="l00041"></a>00041 <span class="comment">// and will be created in the &quot;\data\&quot; folder of the writable drive.</span>
<a name="l00042"></a>00042 <span class="comment">//</span>
<a name="l00043"></a>00043 
<a name="l00044"></a>00044 <span class="preprocessor">#include &quot;WriteToEmbedded.h&quot;</span>
<a name="l00045"></a>00045 <span class="comment">//***************************************************************</span>
<a name="l00046"></a>00046 <span class="comment">//</span>
<a name="l00047"></a>00047 <span class="comment">// Implementations</span>
<a name="l00048"></a>00048 <span class="comment">//***************************************************************</span>
<a name="l00049"></a>00049 
<a name="l00050"></a>00050 <span class="comment">// The file name, extension and path for the file store</span>
<a name="l00051"></a>00051 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFullNameOfFileStore,<span class="stringliteral">&quot;\\epoc32ex\\data\\WriteToEmbedded.dat&quot;</span>);
<a name="l00052"></a>00052 
<a name="l00053"></a>00053                                 <span class="comment">//  Do the example</span>
<a name="l00054"></a>00054 LOCAL_C <span class="keywordtype">void</span> doExampleL()
<a name="l00055"></a>00055     {
<a name="l00056"></a>00056                             <span class="comment">// make sure directory exists</span>
<a name="l00057"></a>00057         fsSession.MkDirAll(KFullNameOfFileStore);
<a name="l00058"></a>00058         doMakeAndStoreL(KFullNameOfFileStore);
<a name="l00059"></a>00059         doDeleteComponentL(KFullNameOfFileStore);
<a name="l00060"></a>00060         }
<a name="l00061"></a>00061  
<a name="l00062"></a>00062 LOCAL_C <span class="keywordtype">void</span> doMakeAndStoreL(<span class="keyword">const</span> TDesC&amp; aName)
<a name="l00063"></a>00063         {
<a name="l00064"></a>00064                                 <span class="comment">// Create (replace, if it exists) the permanent file store</span>
<a name="l00065"></a>00065         TParse  filestorename;
<a name="l00066"></a>00066         fsSession.Parse(aName,filestorename);
<a name="l00067"></a>00067         CFileStore* store = CPermanentFileStore::ReplaceLC(fsSession,filestorename.FullName(),EFileWrite);
<a name="l00068"></a>00068 
<a name="l00069"></a>00069                                 <span class="comment">// Must say what kind of file store.</span>
<a name="l00070"></a>00070         store-&gt;SetTypeL(KPermanentFileStoreLayoutUid);
<a name="l00071"></a>00071         
<a name="l00072"></a>00072                                 <span class="comment">// Construct a main object and its component</span>
<a name="l00073"></a>00073                                 <span class="comment">// CClassABC object; the CClassABC component object</span>
<a name="l00074"></a>00074                                 <span class="comment">// and its components are stored in an embedded store</span>
<a name="l00075"></a>00075                                 <span class="comment">// within the main store.  </span>
<a name="l00076"></a>00076         <a class="code" href="class_c_main_class.html">CMainClass</a>* theMain = CMainClass::NewLC(*store);
<a name="l00077"></a>00077 
<a name="l00078"></a>00078                                 <span class="comment">// Store the CMainClass object in its own stream </span>
<a name="l00079"></a>00079                                 <span class="comment">// in the top level store</span>
<a name="l00080"></a>00080         TStreamId theId = theMain-&gt;StoreL();
<a name="l00081"></a>00081 
<a name="l00082"></a>00082                                 <span class="comment">// Set this stream id as the root stream</span>
<a name="l00083"></a>00083         store-&gt;SetRootL(theId);
<a name="l00084"></a>00084 
<a name="l00085"></a>00085                                 <span class="comment">// Commit theses changes to the top level store</span>
<a name="l00086"></a>00086         store-&gt;CommitL();
<a name="l00087"></a>00087 
<a name="l00088"></a>00088                                 <span class="comment">// Destroy:</span>
<a name="l00089"></a>00089                                 <span class="comment">//              the CMainClass object,</span>
<a name="l00090"></a>00090                                 <span class="comment">//              the permanent file store object (closes the file)</span>
<a name="l00091"></a>00091         CleanupStack::PopAndDestroy(2); 
<a name="l00092"></a>00092         }
<a name="l00093"></a>00093 
<a name="l00094"></a>00094 LOCAL_C <span class="keywordtype">void</span> doDeleteComponentL(<span class="keyword">const</span> TDesC&amp; aName)
<a name="l00095"></a>00095         {
<a name="l00096"></a>00096                                 <span class="comment">// Open the permanent file store</span>
<a name="l00097"></a>00097         TParse  filestorename;
<a name="l00098"></a>00098         fsSession.Parse(aName,filestorename);
<a name="l00099"></a>00099         CFileStore* store = CPermanentFileStore::OpenLC(fsSession,filestorename.FullName(),EFileRead|EFileWrite);
<a name="l00100"></a>00100                                 
<a name="l00101"></a>00101                                 <span class="comment">// Restore the main object</span>
<a name="l00102"></a>00102         <a class="code" href="class_c_main_class.html">CMainClass</a>* theMain = CMainClass::NewLC(*store,store-&gt;Root());
<a name="l00103"></a>00103         
<a name="l00104"></a>00104                                 <span class="comment">// Show the content of the classes contained by CClassABC,</span>
<a name="l00105"></a>00105                                 <span class="comment">// loading as needed</span>
<a name="l00106"></a>00106         <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* abc = theMain-&gt;PtrAbc();
<a name="l00107"></a>00107         
<a name="l00108"></a>00108         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassAContent,<span class="stringliteral">&quot;CClassA content ...&quot;</span>);
<a name="l00109"></a>00109         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassBContent,<span class="stringliteral">&quot;CClassB content ...&quot;</span>);
<a name="l00110"></a>00110         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassCContent,<span class="stringliteral">&quot;CClassC content ...&quot;</span>);
<a name="l00111"></a>00111         <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassABCDeleted,<span class="stringliteral">&quot;CClassABC component deleted&quot;</span>);
<a name="l00112"></a>00112 
<a name="l00113"></a>00113         <span class="keywordflow">if</span> (abc)
<a name="l00114"></a>00114                 {
<a name="l00115"></a>00115                 doShow(KTxtClassAContent,*abc-&gt;PtrA());
<a name="l00116"></a>00116                 doShow(KTxtClassBContent,*abc-&gt;PtrBL());                                        
<a name="l00117"></a>00117                 doShow(KTxtClassCContent,*abc-&gt;PtrC());
<a name="l00118"></a>00118                 }
<a name="l00119"></a>00119         <span class="keywordflow">else</span>
<a name="l00120"></a>00120                 doShow(KTxtClassABCDeleted);
<a name="l00121"></a>00121                 
<a name="l00122"></a>00122                                 <span class="comment">// remove the CClassABC component from CMainClass and</span>
<a name="l00123"></a>00123                                 <span class="comment">// and remove its representation from the store</span>
<a name="l00124"></a>00124         theMain-&gt;RemoveAbcL();
<a name="l00125"></a>00125 
<a name="l00126"></a>00126                                 <span class="comment">// Try and show the contents again; the pointer</span>
<a name="l00127"></a>00127                                 <span class="comment">// abc should now be NULL</span>
<a name="l00128"></a>00128         abc = theMain-&gt;PtrAbc();
<a name="l00129"></a>00129         <span class="keywordflow">if</span> (abc)
<a name="l00130"></a>00130                 {
<a name="l00131"></a>00131                 doShow(KTxtClassAContent,*abc-&gt;PtrA());
<a name="l00132"></a>00132                 doShow(KTxtClassBContent,*abc-&gt;PtrBL());                                        
<a name="l00133"></a>00133                 doShow(KTxtClassCContent,*abc-&gt;PtrC());
<a name="l00134"></a>00134                 }
<a name="l00135"></a>00135         <span class="keywordflow">else</span>
<a name="l00136"></a>00136                 doShow(KTxtClassABCDeleted);
<a name="l00137"></a>00137 
<a name="l00138"></a>00138                                 <span class="comment">// Destroy:</span>
<a name="l00139"></a>00139                                 <span class="comment">//              the CMainClass object, </span>
<a name="l00140"></a>00140                                 <span class="comment">//      the permanent file store object (closes the file) </span>
<a name="l00141"></a>00141         CleanupStack::PopAndDestroy(2);
<a name="l00142"></a>00142         }
<a name="l00143"></a>00143 
<a name="l00144"></a>00144 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtNewLine,<span class="stringliteral">&quot;\n&quot;</span>);
<a name="l00145"></a>00145 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType1,<span class="stringliteral">&quot;\n%S, &quot;</span>);
<a name="l00146"></a>00146 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType2,<span class="stringliteral">&quot;%d, &quot;</span>);
<a name="l00147"></a>00147 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType3,<span class="stringliteral">&quot;%u  &quot;</span>);
<a name="l00148"></a>00148 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType4,<span class="stringliteral">&quot;%u, &quot;</span>);
<a name="l00149"></a>00149 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType5,<span class="stringliteral">&quot;%f  &quot;</span>);
<a name="l00150"></a>00150  
<a name="l00151"></a>00151 LOCAL_C <span class="keywordtype">void</span> doShow(<span class="keyword">const</span> TDesC&amp; aComment)
<a name="l00152"></a>00152         {
<a name="l00153"></a>00153         console-&gt;Printf(KTxtNewLine);
<a name="l00154"></a>00154         console-&gt;Printf(aComment);
<a name="l00155"></a>00155         console-&gt;Printf(KTxtNewLine);
<a name="l00156"></a>00156         }
<a name="l00157"></a>00157         
<a name="l00158"></a>00158 LOCAL_C <span class="keywordtype">void</span> doShow(<span class="keyword">const</span> TDesC&amp; aHeading,<span class="keyword">const</span> <a class="code" href="class_c_class_a.html">CClassA</a>&amp; anA)
<a name="l00159"></a>00159         {
<a name="l00160"></a>00160         console-&gt;Printf(KTxtNewLine);
<a name="l00161"></a>00161         console-&gt;Printf(aHeading);
<a name="l00162"></a>00162         console-&gt;Printf(KFormatType1,anA.iVarBuf);
<a name="l00163"></a>00163         console-&gt;Printf(KFormatType2,anA.iIntValue);
<a name="l00164"></a>00164         console-&gt;Printf(KFormatType3,anA.iUintValue);
<a name="l00165"></a>00165         console-&gt;Printf(KTxtNewLine);
<a name="l00166"></a>00166         }
<a name="l00167"></a>00167 
<a name="l00168"></a>00168 LOCAL_C <span class="keywordtype">void</span> doShow(<span class="keyword">const</span> TDesC&amp; aHeading,<span class="keyword">const</span> CClassB&amp; aB)
<a name="l00169"></a>00169         {
<a name="l00170"></a>00170         console-&gt;Printf(KTxtNewLine);
<a name="l00171"></a>00171         console-&gt;Printf(aHeading);
<a name="l00172"></a>00172         console-&gt;Printf(KFormatType1,&amp;aB.iFixBuf);
<a name="l00173"></a>00173         console-&gt;Printf(KFormatType2,aB.iIntValue);
<a name="l00174"></a>00174         console-&gt;Printf(KFormatType4,aB.iUintValue);
<a name="l00175"></a>00175         console-&gt;Printf(KFormatType5,aB.iRealValue);
<a name="l00176"></a>00176         console-&gt;Printf(KTxtNewLine);
<a name="l00177"></a>00177         }
<a name="l00178"></a>00178 
<a name="l00179"></a>00179 LOCAL_C <span class="keywordtype">void</span> doShow(<span class="keyword">const</span> TDesC&amp; aHeading,<span class="keyword">const</span> CClassC&amp; aC)
<a name="l00180"></a>00180         {
<a name="l00181"></a>00181         console-&gt;Printf(KTxtNewLine);
<a name="l00182"></a>00182         console-&gt;Printf(aHeading);
<a name="l00183"></a>00183         console-&gt;Printf(KFormatType1,&amp;aC.iFixBuf);
<a name="l00184"></a>00184         console-&gt;Printf(KTxtNewLine);
<a name="l00185"></a>00185         }
<a name="l00186"></a>00186 
<a name="l00187"></a>00187 <span class="comment">//***************************************************************</span>
<a name="l00188"></a>00188 <span class="comment">//</span>
<a name="l00189"></a>00189 <span class="comment">// CMainClass Implementation</span>
<a name="l00190"></a>00190 <span class="comment">//</span>
<a name="l00191"></a>00191 <span class="comment">//***************************************************************</span>
<a name="l00192"></a>00192 <a class="code" href="class_c_main_class.html">CMainClass</a>* CMainClass::NewLC(CStreamStore&amp; aStore)
<a name="l00193"></a>00193         {
<a name="l00194"></a>00194         <a class="code" href="class_c_main_class.html">CMainClass</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_main_class.html">CMainClass</a>(aStore);
<a name="l00195"></a>00195         CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00196"></a>00196         <span class="keyword">self</span>-&gt;ConstructL();
<a name="l00197"></a>00197         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00198"></a>00198         }
<a name="l00199"></a>00199 
<a name="l00200"></a>00200 <a class="code" href="class_c_main_class.html">CMainClass</a>* CMainClass::NewLC(CStreamStore&amp; aStore,TStreamId anId)
<a name="l00201"></a>00201         {
<a name="l00202"></a>00202         <a class="code" href="class_c_main_class.html">CMainClass</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_main_class.html">CMainClass</a>(aStore,anId);
<a name="l00203"></a>00203         CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00204"></a>00204         <span class="keyword">self</span>-&gt;RestoreL();
<a name="l00205"></a>00205         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00206"></a>00206         }
<a name="l00207"></a>00207 
<a name="l00208"></a>00208 CMainClass::CMainClass(CStreamStore&amp; aStore)
<a name="l00209"></a>00209         : iStore(aStore)
<a name="l00210"></a>00210         {}
<a name="l00211"></a>00211 
<a name="l00212"></a>00212 CMainClass::CMainClass(CStreamStore&amp; aStore,TStreamId anId)
<a name="l00213"></a>00213         : iStore(aStore), iId(anId)
<a name="l00214"></a>00214         {}
<a name="l00215"></a>00215 
<a name="l00216"></a>00216 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtMainData,<span class="stringliteral">&quot;Main data&quot;</span>);
<a name="l00217"></a>00217 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassAData,<span class="stringliteral">&quot;Data for the CClassA - AAAAA&quot;</span>);
<a name="l00218"></a>00218 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassBData,<span class="stringliteral">&quot;Data for the CClassB - BBBBB&quot;</span>);
<a name="l00219"></a>00219 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassCData,<span class="stringliteral">&quot;Data for the CClassC - CCCCC&quot;</span>);
<a name="l00220"></a>00220 
<a name="l00221"></a>00221 <span class="keywordtype">void</span> CMainClass::ConstructL()
<a name="l00222"></a>00222         {
<a name="l00223"></a>00223         iSomeData = KTxtMainData;
<a name="l00224"></a>00224                                 <span class="comment">// create the stream to contain the embedded store</span>
<a name="l00225"></a>00225         RStoreWriteStream childStream;
<a name="l00226"></a>00226                                 <span class="comment">// we need to keep track of this stream id</span>
<a name="l00227"></a>00227         iEmbeddedStoreId = childStream.CreateLC(iStore);
<a name="l00228"></a>00228                                 <span class="comment">// construct the embedded store</span>
<a name="l00229"></a>00229         CPersistentStore* embeddedStore = CEmbeddedStore::NewLC(childStream);
<a name="l00230"></a>00230                                 <span class="comment">// construct the CClassABC and its containees. Note that</span>
<a name="l00231"></a>00231                                 <span class="comment">// the store it uses is the embedded store.</span>
<a name="l00232"></a>00232         iAbc = CClassABC::NewL(*embeddedStore); 
<a name="l00233"></a>00233         iAbc-&gt;ConstructAL(KTxtClassAData,-1,2);
<a name="l00234"></a>00234         iAbc-&gt;ConstructB(KTxtClassBData,-3,4,5.6);
<a name="l00235"></a>00235         iAbc-&gt;ConstructC(KTxtClassCData);
<a name="l00236"></a>00236                                 <span class="comment">// store the CClassABC and its containees in the</span>
<a name="l00237"></a>00237                                 <span class="comment">// embedded store ...</span>
<a name="l00238"></a>00238         TStreamId idForAbc = iAbc-&gt;StoreL();
<a name="l00239"></a>00239                                 <span class="comment">// ... and set this stream id as the root </span>
<a name="l00240"></a>00240                                 <span class="comment">// stream of the embedded store</span>
<a name="l00241"></a>00241         embeddedStore-&gt;SetRootL(idForAbc);      
<a name="l00242"></a>00242                                 <span class="comment">// Commit changes to the embedded store</span>
<a name="l00243"></a>00243         embeddedStore-&gt;CommitL();
<a name="l00244"></a>00244                                 <span class="comment">// Commit changes to the stream containing the </span>
<a name="l00245"></a>00245                                 <span class="comment">// embedded store.</span>
<a name="l00246"></a>00246         childStream.CommitL();
<a name="l00247"></a>00247                                 <span class="comment">// Destroy the embedded store object</span>
<a name="l00248"></a>00248                                 <span class="comment">// Cleanup the stream containing the emmbedded store </span>
<a name="l00249"></a>00249         CleanupStack::PopAndDestroy(2);
<a name="l00250"></a>00250         }
<a name="l00251"></a>00251 
<a name="l00252"></a>00252 CMainClass::~CMainClass()
<a name="l00253"></a>00253         {
<a name="l00254"></a>00254         <span class="keyword">delete</span> iEmbeddedStore;
<a name="l00255"></a>00255         iChildStream.Release(); <span class="comment">//stream cleanup</span>
<a name="l00256"></a>00256         <span class="keyword">delete</span> iAbc;
<a name="l00257"></a>00257         }
<a name="l00258"></a>00258 
<a name="l00259"></a>00259 TStreamId CMainClass::StoreL()
<a name="l00260"></a>00260         {
<a name="l00261"></a>00261         RStoreWriteStream stream;
<a name="l00262"></a>00262         TStreamId <span class="keywordtype">id</span> = stream.CreateLC(iStore);
<a name="l00263"></a>00263         ExternalizeL(stream);
<a name="l00264"></a>00264         stream.CommitL();
<a name="l00265"></a>00265         CleanupStack::PopAndDestroy();
<a name="l00266"></a>00266         <span class="keywordflow">return</span> id;
<a name="l00267"></a>00267         }
<a name="l00268"></a>00268         
<a name="l00269"></a>00269 <span class="keywordtype">void</span> CMainClass::ExternalizeL(RWriteStream&amp; aStream)
<a name="l00270"></a>00270         {
<a name="l00271"></a>00271         aStream &lt;&lt; iSomeData; 
<a name="l00272"></a>00272         aStream &lt;&lt; iEmbeddedStoreId;
<a name="l00273"></a>00273         }
<a name="l00274"></a>00274 
<a name="l00275"></a>00275 <span class="keywordtype">void</span> CMainClass::RestoreL()
<a name="l00276"></a>00276         {
<a name="l00277"></a>00277         RStoreReadStream stream;
<a name="l00278"></a>00278         stream.OpenLC(iStore,iId);
<a name="l00279"></a>00279                                 <span class="comment">// restore the CMainClass object</span>
<a name="l00280"></a>00280         InternalizeL(stream);
<a name="l00281"></a>00281                                 <span class="comment">// clean up the stream</span>
<a name="l00282"></a>00282         CleanupStack::PopAndDestroy();
<a name="l00283"></a>00283                                 <span class="comment">// open stream containing the embedded store</span>
<a name="l00284"></a>00284                                 <span class="comment">// (and keep it open)</span>
<a name="l00285"></a>00285         <span class="keywordflow">if</span> (iEmbeddedStoreId != KNullStreamId)
<a name="l00286"></a>00286                 {
<a name="l00287"></a>00287                 iChildStream.OpenL(iStore,iEmbeddedStoreId);
<a name="l00288"></a>00288                                 <span class="comment">// construct the embedded store </span>
<a name="l00289"></a>00289                                 <span class="comment">// (and keep it open)</span>
<a name="l00290"></a>00290                 iEmbeddedStore = CEmbeddedStore::FromL(iChildStream);
<a name="l00291"></a>00291                                 <span class="comment">// restore the CClassABC object network from the</span>
<a name="l00292"></a>00292                                 <span class="comment">// embedded store. Note that not all of CClassABC&#39;s</span>
<a name="l00293"></a>00293                                 <span class="comment">// containees are loaded in, hence the need to keep</span>
<a name="l00294"></a>00294                                 <span class="comment">// the embedded store open </span>
<a name="l00295"></a>00295                 iAbc = CClassABC::NewL(*iEmbeddedStore,iEmbeddedStore-&gt;Root());
<a name="l00296"></a>00296                 }
<a name="l00297"></a>00297         }
<a name="l00298"></a>00298 
<a name="l00299"></a>00299 <span class="keywordtype">void</span> CMainClass::InternalizeL(RReadStream&amp; aStream)
<a name="l00300"></a>00300         {
<a name="l00301"></a>00301         aStream &gt;&gt; iSomeData; 
<a name="l00302"></a>00302         aStream &gt;&gt; iEmbeddedStoreId;
<a name="l00303"></a>00303         }
<a name="l00304"></a>00304 
<a name="l00305"></a>00305 <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* CMainClass::PtrAbc()
<a name="l00306"></a>00306         {
<a name="l00307"></a>00307         <span class="keywordflow">return</span> iAbc;
<a name="l00308"></a>00308         }
<a name="l00309"></a>00309 
<a name="l00310"></a>00310 <span class="keywordtype">void</span> CMainClass::RemoveAbcL()
<a name="l00311"></a>00311         {
<a name="l00312"></a>00312                                 <span class="comment">// Remove the CClassABC component from memory an</span>
<a name="l00313"></a>00313                                 <span class="comment">// from the store. </span>
<a name="l00314"></a>00314                                 <span class="comment">// To remove the CClassABC representation from the </span>
<a name="l00315"></a>00315                                 <span class="comment">// store, just delete the stream containing the</span>
<a name="l00316"></a>00316                                 <span class="comment">// embedded store which contains the representation of</span>
<a name="l00317"></a>00317                                 <span class="comment">// the CClassABC object network.</span>
<a name="l00318"></a>00318         <span class="keywordflow">if</span> (!iAbc)
<a name="l00319"></a>00319                 <span class="keywordflow">return</span>;
<a name="l00320"></a>00320         <span class="keyword">delete</span> iAbc;
<a name="l00321"></a>00321         iAbc = NULL;
<a name="l00322"></a>00322                                 <span class="comment">// close the embedded store</span>
<a name="l00323"></a>00323         <span class="keyword">delete</span> iEmbeddedStore;
<a name="l00324"></a>00324         iEmbeddedStore = NULL;
<a name="l00325"></a>00325                                 <span class="comment">// cleanup the stream (this is in the top </span>
<a name="l00326"></a>00326                                 <span class="comment">// level store) containing the embedded store</span>
<a name="l00327"></a>00327         iChildStream.Release();
<a name="l00328"></a>00328                                 <span class="comment">// delete the stream from the top level store ...</span>
<a name="l00329"></a>00329         iStore.DeleteL(iEmbeddedStoreId);
<a name="l00330"></a>00330                                 <span class="comment">// ... and commit these changes to the top</span>
<a name="l00331"></a>00331                                 <span class="comment">// level store</span>
<a name="l00332"></a>00332         iStore.CommitL();                       
<a name="l00333"></a>00333         iEmbeddedStoreId = KNullStreamId;
<a name="l00334"></a>00334         }
<a name="l00335"></a>00335 
<a name="l00336"></a>00336 <span class="comment">//***************************************************************</span>
<a name="l00337"></a>00337 <span class="comment">//</span>
<a name="l00338"></a>00338 <span class="comment">// CClassABC Implementation</span>
<a name="l00339"></a>00339 <span class="comment">//</span>
<a name="l00340"></a>00340 <span class="comment">//***************************************************************</span>
<a name="l00341"></a>00341 CClassABC::CClassABC(CStreamStore&amp; aStore)
<a name="l00342"></a>00342         : iStore(aStore)
<a name="l00343"></a>00343         {}
<a name="l00344"></a>00344 
<a name="l00345"></a>00345 CClassABC::CClassABC(CStreamStore&amp; aStore,TStreamId anId)
<a name="l00346"></a>00346         : iStore(aStore), iId(anId)
<a name="l00347"></a>00347         {}
<a name="l00348"></a>00348 
<a name="l00349"></a>00349 <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* CClassABC::NewLC(CStreamStore&amp; aStore)
<a name="l00350"></a>00350         {
<a name="l00351"></a>00351         <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>(aStore);
<a name="l00352"></a>00352         CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00353"></a>00353         <span class="keyword">self</span>-&gt;ConstructL();
<a name="l00354"></a>00354         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00355"></a>00355         }
<a name="l00356"></a>00356 
<a name="l00357"></a>00357 <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* CClassABC::NewL(CStreamStore&amp; aStore)
<a name="l00358"></a>00358         {
<a name="l00359"></a>00359         <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* <span class="keyword">self</span> = CClassABC::NewLC(aStore);
<a name="l00360"></a>00360         CleanupStack::Pop();
<a name="l00361"></a>00361         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00362"></a>00362         }
<a name="l00363"></a>00363 
<a name="l00364"></a>00364 <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* CClassABC::NewLC(CStreamStore&amp; aStore, TStreamId anId)
<a name="l00365"></a>00365         {                                                                                                                       
<a name="l00366"></a>00366         <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>(aStore,anId);
<a name="l00367"></a>00367         CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00368"></a>00368         <span class="keyword">self</span>-&gt;RestoreL();
<a name="l00369"></a>00369         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00370"></a>00370         }
<a name="l00371"></a>00371 
<a name="l00372"></a>00372 <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* CClassABC::NewL(CStreamStore&amp; aStore, TStreamId anId)
<a name="l00373"></a>00373         {
<a name="l00374"></a>00374         <a class="code" href="class_c_class_a_b_c.html">CClassABC</a>* <span class="keyword">self</span> = CClassABC::NewLC(aStore,anId);
<a name="l00375"></a>00375         CleanupStack::Pop();
<a name="l00376"></a>00376         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00377"></a>00377         }
<a name="l00378"></a>00378                 
<a name="l00379"></a>00379 <span class="keywordtype">void</span> CClassABC::ConstructL()
<a name="l00380"></a>00380         {
<a name="l00381"></a>00381         iA = CClassA::NewL();
<a name="l00382"></a>00382         iB = CClassB::NewL();
<a name="l00383"></a>00383         iC = CClassC::NewL();
<a name="l00384"></a>00384         }
<a name="l00385"></a>00385 
<a name="l00386"></a>00386 <span class="keywordtype">void</span> CClassABC::ConstructAL(<span class="keyword">const</span> TDesC&amp; aData,TInt anInt,TUint aUint)
<a name="l00387"></a>00387         {
<a name="l00388"></a>00388         iA-&gt;iVarBuf    = aData.AllocL();        
<a name="l00389"></a>00389         iA-&gt;iIntValue  = anInt;
<a name="l00390"></a>00390         iA-&gt;iUintValue = aUint;
<a name="l00391"></a>00391         }
<a name="l00392"></a>00392                         
<a name="l00393"></a>00393 <span class="keywordtype">void</span> CClassABC::ConstructB(<span class="keyword">const</span> TDesC&amp; aData,TInt anInt,TUint aUint,TReal aReal)
<a name="l00394"></a>00394         {
<a name="l00395"></a>00395         iB-&gt;iFixBuf    = aData;
<a name="l00396"></a>00396         iB-&gt;iIntValue  = anInt; 
<a name="l00397"></a>00397         iB-&gt;iUintValue = aUint;
<a name="l00398"></a>00398         iB-&gt;iRealValue = aReal;
<a name="l00399"></a>00399         }
<a name="l00400"></a>00400                         
<a name="l00401"></a>00401 <span class="keywordtype">void</span> CClassABC::ConstructC(<span class="keyword">const</span> TDesC&amp; aData)
<a name="l00402"></a>00402         {
<a name="l00403"></a>00403         iC-&gt;iFixBuf = aData;
<a name="l00404"></a>00404         }
<a name="l00405"></a>00405 
<a name="l00406"></a>00406 
<a name="l00407"></a>00407                         <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00408"></a>00408                         <span class="comment">// Destructor deletes the CClassB object only if it is in memory.</span>
<a name="l00409"></a>00409                         <span class="comment">// The IsPtr() function can be used to determine whether the </span>
<a name="l00410"></a>00410                         <span class="comment">// CClassB object is memory. </span>
<a name="l00411"></a>00411                         <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00412"></a>00412 CClassABC::~CClassABC()
<a name="l00413"></a>00413         {
<a name="l00414"></a>00414         <span class="keyword">delete</span> iA;
<a name="l00415"></a>00415         <span class="keyword">delete</span> iC;
<a name="l00416"></a>00416         <span class="keywordflow">if</span> (iB.IsPtr())
<a name="l00417"></a>00417                 <span class="keyword">delete</span> iB.AsPtr(); <span class="comment">// can also &quot;delete iB;&quot; makes implicit call to &quot;operator T*()&quot;</span>
<a name="l00418"></a>00418         }
<a name="l00419"></a>00419 
<a name="l00420"></a>00420         
<a name="l00421"></a>00421                                 <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00422"></a>00422                                 <span class="comment">// Stores the CClassB object in its own stream and</span>
<a name="l00423"></a>00423                                 <span class="comment">// then stores:</span>
<a name="l00424"></a>00424                                 <span class="comment">//              the CClassA object,</span>
<a name="l00425"></a>00425                                 <span class="comment">//              the streamid of the CClassB object,</span>
<a name="l00426"></a>00426                                 <span class="comment">//              the CClassC object</span>
<a name="l00427"></a>00427                                 <span class="comment">// in a separate stream.</span>
<a name="l00428"></a>00428                                 <span class="comment">// Returns the streamid of this last stream</span>
<a name="l00429"></a>00429                                 <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00430"></a>00430 TStreamId CClassABC::StoreL()
<a name="l00431"></a>00431         {
<a name="l00432"></a>00432                                 <span class="comment">// Construct the output stream which is intended</span>
<a name="l00433"></a>00433                                 <span class="comment">// to hold the CClassB object only.</span>
<a name="l00434"></a>00434         RStoreWriteStream outstream;
<a name="l00435"></a>00435         TStreamId idForB = outstream.CreateLC(iStore);
<a name="l00436"></a>00436                                 <span class="comment">// Stream out the CClassB object.</span>
<a name="l00437"></a>00437                                 <span class="comment">// Note that the right hand side returns a reference</span>
<a name="l00438"></a>00438                                 <span class="comment">// to CClassB</span>
<a name="l00439"></a>00439         outstream  &lt;&lt; *iB; 
<a name="l00440"></a>00440                                 <span class="comment">// Commit changes to the stream</span>
<a name="l00441"></a>00441         outstream.CommitL();
<a name="l00442"></a>00442                                 <span class="comment">// Cleanup the stream object</span>
<a name="l00443"></a>00443         CleanupStack::PopAndDestroy();  
<a name="l00444"></a>00444                                 <span class="comment">// Now construct the output stream which is intended</span>
<a name="l00445"></a>00445                                 <span class="comment">// to hold:</span>
<a name="l00446"></a>00446                                 <span class="comment">//              the CClassA object,</span>
<a name="l00447"></a>00447                                 <span class="comment">//              the streamid of the CClassB object,</span>
<a name="l00448"></a>00448                                 <span class="comment">//              the CClassC object</span>
<a name="l00449"></a>00449         TStreamId <span class="keywordtype">id</span> = outstream.CreateLC(iStore);
<a name="l00450"></a>00450                                 <span class="comment">// Write out the CClassA object.</span>
<a name="l00451"></a>00451         outstream  &lt;&lt; *iA; 
<a name="l00452"></a>00452                                 <span class="comment">// Write out the stream id of the CClassB object</span>
<a name="l00453"></a>00453         outstream  &lt;&lt; idForB;
<a name="l00454"></a>00454                                 <span class="comment">// Write out the CClassC object.</span>
<a name="l00455"></a>00455         outstream  &lt;&lt; *iC;
<a name="l00456"></a>00456                                 <span class="comment">// Commit changes to the stream</span>
<a name="l00457"></a>00457         outstream.CommitL();
<a name="l00458"></a>00458                                 <span class="comment">// Cleanup the stream object,</span>
<a name="l00459"></a>00459         CleanupStack::PopAndDestroy();  
<a name="l00460"></a>00460                                 <span class="comment">// Return this stream id</span>
<a name="l00461"></a>00461         <span class="keywordflow">return</span> id;
<a name="l00462"></a>00462         }
<a name="l00463"></a>00463 
<a name="l00464"></a>00464                                 
<a name="l00465"></a>00465 <span class="keyword">const</span> <a class="code" href="class_c_class_a.html">CClassA</a>* CClassABC::PtrA()
<a name="l00466"></a>00466         {
<a name="l00467"></a>00467         <span class="keywordflow">return</span> iA;      <span class="comment">// Return a pointer to the contained CClassA object</span>
<a name="l00468"></a>00468         }
<a name="l00469"></a>00469 
<a name="l00470"></a>00470                                 
<a name="l00471"></a>00471 <span class="keyword">const</span> CClassB* CClassABC::PtrBL()
<a name="l00472"></a>00472         {
<a name="l00473"></a>00473         <span class="keywordflow">if</span> (iB.IsId())          <span class="comment">// If the contained CClassB object is not in memory, it must</span>
<a name="l00474"></a>00474                 RestoreBL();    <span class="comment">// be loaded in before a pointer can be returned to the caller</span>
<a name="l00475"></a>00475         <span class="keywordflow">return</span> iB.AsPtr();
<a name="l00476"></a>00476         }
<a name="l00477"></a>00477 
<a name="l00478"></a>00478                                 
<a name="l00479"></a>00479 <span class="keyword">const</span> CClassC* CClassABC::PtrC()
<a name="l00480"></a>00480         {
<a name="l00481"></a>00481         <span class="keywordflow">return</span> iC;      <span class="comment">//Returns a pointer to the contained CClassC object</span>
<a name="l00482"></a>00482         }
<a name="l00483"></a>00483                                 
<a name="l00484"></a>00484                                 <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00485"></a>00485                                 <span class="comment">// Restores the CClassA and CClassC objects and the streamid for the</span>
<a name="l00486"></a>00486                                 <span class="comment">// CClassB object.</span>
<a name="l00487"></a>00487                                 <span class="comment">// The swizzle for the CClassB object is constructed from the</span>
<a name="l00488"></a>00488                                 <span class="comment">// streamid but the CClassB object itself is NOT restored at </span>
<a name="l00489"></a>00489                                 <span class="comment">// this time.</span>
<a name="l00490"></a>00490                                 <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00491"></a>00491 <span class="keywordtype">void</span> CClassABC::RestoreL()
<a name="l00492"></a>00492         {
<a name="l00493"></a>00493                                 <span class="comment">// Construct the input stream.</span>
<a name="l00494"></a>00494         RStoreReadStream instream;
<a name="l00495"></a>00495         instream.OpenLC(iStore,iId);
<a name="l00496"></a>00496                                 <span class="comment">// Construct a CClassA object and restore from the stream</span>
<a name="l00497"></a>00497         iA = CClassA::NewL();
<a name="l00498"></a>00498         instream &gt;&gt; *iA;
<a name="l00499"></a>00499                                 <span class="comment">// Construct the swizzle for the CClassB object. This</span>
<a name="l00500"></a>00500                                 <span class="comment">// stream contains the id of the stream which </span>
<a name="l00501"></a>00501                                 <span class="comment">// actually contains the full CClassB object. The loading of</span>
<a name="l00502"></a>00502                                 <span class="comment">// the CClassB object into memory is deferred until later.</span>
<a name="l00503"></a>00503                                 <span class="comment">// The resulting swizzle represents the CClassB object as </span>
<a name="l00504"></a>00504                                 <span class="comment">// a streamid </span>
<a name="l00505"></a>00505         instream &gt;&gt; iB;
<a name="l00506"></a>00506                                 <span class="comment">// Construct a CClassC object and restrore from the stream</span>
<a name="l00507"></a>00507         iC = CClassC::NewL();
<a name="l00508"></a>00508         instream &gt;&gt; *iC;
<a name="l00509"></a>00509                                 <span class="comment">// Cleanup the stream object</span>
<a name="l00510"></a>00510         CleanupStack::PopAndDestroy();
<a name="l00511"></a>00511         }
<a name="l00512"></a>00512 
<a name="l00513"></a>00513 
<a name="l00514"></a>00514                                 <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00515"></a>00515                                 <span class="comment">// Loads the CClassB object into memory and changes the swizzle&#39;s</span>
<a name="l00516"></a>00516                                 <span class="comment">// representation from &quot;streamid&quot; to &quot;pointer&quot;.</span>
<a name="l00517"></a>00517                                 <span class="comment">// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * </span>
<a name="l00518"></a>00518 <span class="keywordtype">void</span> CClassABC::RestoreBL()
<a name="l00519"></a>00519         {
<a name="l00520"></a>00520                                 <span class="comment">// Construct the input stream. Assumes we have the correct store (this</span>
<a name="l00521"></a>00521                                 <span class="comment">// emphasizes the need to ensure that the store remain open)</span>
<a name="l00522"></a>00522         RStoreReadStream instream;
<a name="l00523"></a>00523         instream.OpenLC(iStore,iB.AsId());
<a name="l00524"></a>00524                                 <span class="comment">// Construct a CClassB object and restore from the stream. The </span>
<a name="l00525"></a>00525                                 <span class="comment">// assignment: CClassB* to TSwizzle&lt;CClassB&gt; changes the</span>
<a name="l00526"></a>00526                                 <span class="comment">// swizzle&#39;s representation of the CClassB object </span>
<a name="l00527"></a>00527                                 <span class="comment">// from &quot;streamid&quot; to &quot;pointer&quot;</span>
<a name="l00528"></a>00528         CClassB* ptrB = CClassB::NewLC();
<a name="l00529"></a>00529         instream &gt;&gt; *ptrB;
<a name="l00530"></a>00530         CleanupStack::Pop();
<a name="l00531"></a>00531         iB = ptrB;
<a name="l00532"></a>00532                                 <span class="comment">// Cleanup the stream object                    </span>
<a name="l00533"></a>00533         CleanupStack::PopAndDestroy();
<a name="l00534"></a>00534         }       
<a name="l00535"></a>00535 
<a name="l00536"></a>00536 <span class="comment">//***************************************************************</span>
<a name="l00537"></a>00537 <span class="comment">//</span>
<a name="l00538"></a>00538 <span class="comment">// CClassA Implementation</span>
<a name="l00539"></a>00539 <span class="comment">//</span>
<a name="l00540"></a>00540 <span class="comment">//***************************************************************</span>
<a name="l00541"></a>00541 <a class="code" href="class_c_class_a.html">CClassA</a>* CClassA::NewL()
<a name="l00542"></a>00542         {
<a name="l00543"></a>00543         <a class="code" href="class_c_class_a.html">CClassA</a>* <span class="keyword">self</span> = CClassA::NewLC();
<a name="l00544"></a>00544         CleanupStack::Pop();
<a name="l00545"></a>00545         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00546"></a>00546         }
<a name="l00547"></a>00547 
<a name="l00548"></a>00548 <a class="code" href="class_c_class_a.html">CClassA</a>* CClassA::NewLC()
<a name="l00549"></a>00549         {
<a name="l00550"></a>00550         <a class="code" href="class_c_class_a.html">CClassA</a>* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_class_a.html">CClassA</a>;
<a name="l00551"></a>00551         CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00552"></a>00552         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00553"></a>00553         }
<a name="l00554"></a>00554 
<a name="l00555"></a>00555 CClassA::~CClassA()
<a name="l00556"></a>00556         {
<a name="l00557"></a>00557         <span class="keyword">delete</span> iVarBuf;
<a name="l00558"></a>00558         }
<a name="l00559"></a>00559 
<a name="l00560"></a>00560 <span class="keywordtype">void</span> CClassA::ExternalizeL(RWriteStream&amp; aStream)<span class="keyword"> const</span>
<a name="l00561"></a>00561 <span class="keyword">        </span>{
<a name="l00562"></a>00562         aStream.WriteInt32L(iVarBuf-&gt;Des().MaxLength());
<a name="l00563"></a>00563         aStream &lt;&lt; *iVarBuf;
<a name="l00564"></a>00564         aStream.WriteInt32L(iIntValue);
<a name="l00565"></a>00565         aStream.WriteUint32L(iUintValue);
<a name="l00566"></a>00566         }  
<a name="l00567"></a>00567  
<a name="l00568"></a>00568 <span class="keywordtype">void</span> CClassA::InternalizeL(RReadStream&amp; aStream)
<a name="l00569"></a>00569         {
<a name="l00570"></a>00570         TInt maxlen;
<a name="l00571"></a>00571         maxlen     = aStream.ReadInt32L();
<a name="l00572"></a>00572         iVarBuf    = HBufC::NewL(aStream,maxlen);
<a name="l00573"></a>00573         iIntValue  = aStream.ReadInt32L();
<a name="l00574"></a>00574         iUintValue = aStream.ReadUint32L();
<a name="l00575"></a>00575         }  
<a name="l00576"></a>00576                 
<a name="l00577"></a>00577 
<a name="l00578"></a>00578 <span class="comment">//***************************************************************</span>
<a name="l00579"></a>00579 <span class="comment">//</span>
<a name="l00580"></a>00580 <span class="comment">// CClassB Implementation</span>
<a name="l00581"></a>00581 <span class="comment">//</span>
<a name="l00582"></a>00582 <span class="comment">//***************************************************************</span>
<a name="l00583"></a>00583 CClassB* CClassB::NewLC()
<a name="l00584"></a>00584         {
<a name="l00585"></a>00585         CClassB* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) CClassB;
<a name="l00586"></a>00586         CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00587"></a>00587         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00588"></a>00588         }
<a name="l00589"></a>00589 
<a name="l00590"></a>00590 CClassB* CClassB::NewL()        
<a name="l00591"></a>00591         {
<a name="l00592"></a>00592         CClassB* <span class="keyword">self</span> = <a class="code" href="class_c_sql_example.html#a8b115210a3fbfa19de5c7f6a0abf3e43">CClassB::NewLC</a>();
<a name="l00593"></a>00593         CleanupStack::Pop();    
<a name="l00594"></a>00594         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00595"></a>00595         }
<a name="l00596"></a>00596 
<a name="l00597"></a>00597 <span class="keywordtype">void</span> CClassB::ExternalizeL(RWriteStream&amp; aStream)<span class="keyword"> const</span>
<a name="l00598"></a>00598 <span class="keyword">        </span>{
<a name="l00599"></a>00599         aStream &lt;&lt; iFixBuf;
<a name="l00600"></a>00600         aStream.WriteInt32L(iIntValue);
<a name="l00601"></a>00601         aStream.WriteUint32L(iUintValue);
<a name="l00602"></a>00602         aStream.WriteReal64L(iRealValue);
<a name="l00603"></a>00603         }  
<a name="l00604"></a>00604  
<a name="l00605"></a>00605 <span class="keywordtype">void</span> CClassB::InternalizeL(RReadStream&amp; aStream)
<a name="l00606"></a>00606         {
<a name="l00607"></a>00607         aStream &gt;&gt; iFixBuf;
<a name="l00608"></a>00608         iIntValue  = aStream.ReadInt32L();
<a name="l00609"></a>00609         iUintValue = aStream.ReadUint32L();
<a name="l00610"></a>00610         iRealValue = aStream.ReadReal64L();
<a name="l00611"></a>00611         }  
<a name="l00612"></a>00612 
<a name="l00613"></a>00613 <span class="comment">//***************************************************************</span>
<a name="l00614"></a>00614 <span class="comment">//</span>
<a name="l00615"></a>00615 <span class="comment">// CClassC Implementation</span>
<a name="l00616"></a>00616 <span class="comment">//</span>
<a name="l00617"></a>00617 <span class="comment">//***************************************************************</span>
<a name="l00618"></a>00618 CClassC* CClassC::NewL()
<a name="l00619"></a>00619         {
<a name="l00620"></a>00620         CClassC* <span class="keyword">self</span> = <a class="code" href="class_c_sql_example.html#a8b115210a3fbfa19de5c7f6a0abf3e43">CClassC::NewLC</a>();
<a name="l00621"></a>00621         CleanupStack::Pop();
<a name="l00622"></a>00622         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00623"></a>00623         }
<a name="l00624"></a>00624 
<a name="l00625"></a>00625 CClassC* CClassC::NewLC()
<a name="l00626"></a>00626         {
<a name="l00627"></a>00627         CClassC* <span class="keyword">self</span> = <span class="keyword">new</span> (ELeave) CClassC;
<a name="l00628"></a>00628         CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00629"></a>00629         <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00630"></a>00630         }
<a name="l00631"></a>00631 
<a name="l00632"></a>00632 <span class="keywordtype">void</span> CClassC::ExternalizeL(RWriteStream&amp; aStream)<span class="keyword"> const</span>
<a name="l00633"></a>00633 <span class="keyword">        </span>{
<a name="l00634"></a>00634         aStream &lt;&lt; iFixBuf;
<a name="l00635"></a>00635         }  
<a name="l00636"></a>00636  
<a name="l00637"></a>00637 <span class="keywordtype">void</span> CClassC::InternalizeL(RReadStream&amp; aStream)
<a name="l00638"></a>00638         {
<a name="l00639"></a>00639         aStream &gt;&gt; iFixBuf;
<a name="l00640"></a>00640         }  
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