Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_store_map_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
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<h1>examples/SysLibs/Streams/StoreMap/StoreMap.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 "Eclipse Public License v1.0"</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 "http://www.eclipse.org/legal/epl-v10.html".</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 to demonstrate the streaming of a compound object to</span>
<a name="l00015"></a>00015 <span class="comment">// multiple streams with deferred loading.</span>
<a name="l00016"></a>00016 <span class="comment">// Also illustrates the use of a store map (CStoreMap) </span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#include "CommonStreamStore.h"</span>
<a name="l00020"></a>00020 <span class="preprocessor">#include <s32file.h></span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00023"></a>00023 <span class="comment">// Format types and the newline character</span>
<a name="l00024"></a>00024 <span class="comment">//</span>
<a name="l00025"></a>00025
<a name="l00026"></a>00026 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtNewLine,<span class="stringliteral">"\n"</span>);
<a name="l00027"></a>00027 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType1,<span class="stringliteral">"\n%d"</span>);
<a name="l00028"></a>00028 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType2,<span class="stringliteral">"\n%S"</span>);
<a name="l00029"></a>00029 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType3,<span class="stringliteral">"\n%u"</span>);
<a name="l00030"></a>00030 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFormatType4,<span class="stringliteral">"\n%f"</span>);
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="comment">// Constructs a CCompound object and externalizes</span>
<a name="l00033"></a>00033 <span class="comment">// it and its components to separate streams.</span>
<a name="l00034"></a>00034 <span class="keyword">static</span> <span class="keywordtype">void</span> doMakeAndExternalizeL(<span class="keyword">const</span> TDesC& aName);
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="comment">// Demonstrates deferred loading of</span>
<a name="l00037"></a>00037 <span class="comment">// component objects.</span>
<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keywordtype">void</span> doDeferredLoadingL(<span class="keyword">const</span> TDesC& aName);
<a name="l00039"></a>00039
<a name="l00040"></a>00040 <span class="comment">// Shows the content of the compound object </span>
<a name="l00041"></a>00041 <span class="keyword">class </span>CCompound;
<a name="l00042"></a>00042 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowAll(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> CCompound& aCompound);
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="comment">// Shows the content of the CLassA component</span>
<a name="l00045"></a>00045 <span class="comment">// of the compound object.</span>
<a name="l00046"></a>00046 <span class="keyword">class </span><a class="code" href="class_c_class_a.html">CClassA</a>;
<a name="l00047"></a>00047 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowComponent(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> <a class="code" href="class_c_class_a.html">CClassA</a>& aComponent);
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">// Shows the content of the CLassB component</span>
<a name="l00050"></a>00050 <span class="comment">// of the compound object.</span>
<a name="l00051"></a>00051 <span class="keyword">class </span>CClassB;
<a name="l00052"></a>00052 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowComponent(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> CClassB& aComponent);
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <span class="comment">// Shows the content of the CLassB component</span>
<a name="l00055"></a>00055 <span class="comment">// of the compound object.</span>
<a name="l00056"></a>00056 <span class="keyword">class </span>CClassC;
<a name="l00057"></a>00057 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowComponent(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> CClassC& aComponent);
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">// Defintion of classes used by the example</span>
<a name="l00060"></a>00060 <span class="keyword">class </span><a class="code" href="class_c_class_a.html">CClassA</a>
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 <span class="keyword">public</span> :
<a name="l00063"></a>00063 <span class="keywordtype">void</span> ExternalizeL(RWriteStream& aStream) <span class="keyword">const</span>;
<a name="l00064"></a>00064 <span class="keywordtype">void</span> InternalizeL(RReadStream& aStream);
<a name="l00065"></a>00065 TStreamId StoreL(CStreamStore& aStore) <span class="keyword">const</span>;
<a name="l00066"></a>00066 <span class="keywordtype">void</span> RestoreL(CStreamStore& aStore, TStreamId anId);
<a name="l00067"></a>00067 <span class="keyword">public</span> :
<a name="l00068"></a>00068 TBuf<32> iBufferA;
<a name="l00069"></a>00069 TInt iXA;
<a name="l00070"></a>00070 TUint iYA;
<a name="l00071"></a>00071 };
<a name="l00072"></a>00072
<a name="l00073"></a>00073
<a name="l00074"></a>00074 <span class="keyword">class </span>CClassB
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076 <span class="keyword">public</span> :
<a name="l00077"></a>00077 <span class="keywordtype">void</span> ExternalizeL(RWriteStream& aStream) <span class="keyword">const</span>;
<a name="l00078"></a>00078 <span class="keywordtype">void</span> InternalizeL(RReadStream& aStream);
<a name="l00079"></a>00079 TStreamId StoreL(CStreamStore& aStore) <span class="keyword">const</span>;
<a name="l00080"></a>00080 <span class="keywordtype">void</span> RestoreL(CStreamStore& aStore, TStreamId anId);
<a name="l00081"></a>00081 <span class="keyword">public</span> :
<a name="l00082"></a>00082 TBuf<32> iBufferB;
<a name="l00083"></a>00083 };
<a name="l00084"></a>00084
<a name="l00085"></a>00085
<a name="l00086"></a>00086 <span class="keyword">class </span>CClassC
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <span class="keyword">public</span> :
<a name="l00089"></a>00089 <span class="keywordtype">void</span> ExternalizeL(RWriteStream& aStream) <span class="keyword">const</span>;
<a name="l00090"></a>00090 <span class="keywordtype">void</span> InternalizeL(RReadStream& aStream);
<a name="l00091"></a>00091 TStreamId StoreL(CStreamStore& aStore) <span class="keyword">const</span>;
<a name="l00092"></a>00092 <span class="keywordtype">void</span> RestoreL(CStreamStore& aStore, TStreamId anId);
<a name="l00093"></a>00093 <span class="keyword">public</span> :
<a name="l00094"></a>00094 TReal iZC;
<a name="l00095"></a>00095 };
<a name="l00096"></a>00096
<a name="l00097"></a>00097
<a name="l00098"></a>00098 <span class="keyword">class </span>CCompound : <span class="keyword">public</span> CBase
<a name="l00099"></a>00099 {
<a name="l00100"></a>00100 <span class="keyword">public</span> :
<a name="l00101"></a>00101 <span class="keyword">static</span> CCompound* NewLC(CStreamStore& aStore);
<a name="l00102"></a>00102 <span class="keyword">static</span> CCompound* NewLC(CStreamStore& aStore,TStreamId anId);
<a name="l00103"></a>00103 <span class="keyword">public</span> :
<a name="l00104"></a>00104 CCompound(CStreamStore& aStore);
<a name="l00105"></a>00105 CCompound(CStreamStore& aStore,TStreamId anId);
<a name="l00106"></a>00106 ~CCompound();
<a name="l00107"></a>00107 <span class="keywordtype">void</span> InternalizeL(RReadStream& aStream);
<a name="l00108"></a>00108 <span class="keywordtype">void</span> ExternalizeL(RWriteStream& aStream) <span class="keyword">const</span>;
<a name="l00109"></a>00109 TStreamId StoreL() <span class="keyword">const</span>;
<a name="l00110"></a>00110 <span class="keywordtype">void</span> RestoreL();
<a name="l00111"></a>00111 <span class="keywordtype">void</span> StoreComponentsL(CStoreMap& aMap) <span class="keyword">const</span>;
<a name="l00112"></a>00112 <span class="keywordtype">void</span> DisplayAL(<span class="keyword">const</span> TDesC& aCommentary);
<a name="l00113"></a>00113 <span class="keyword">private</span>:
<a name="l00114"></a>00114 <span class="keywordtype">void</span> ConstructL();
<a name="l00115"></a>00115 <span class="keyword">public</span> :
<a name="l00116"></a>00116 TSwizzle<CClassA> iA;
<a name="l00117"></a>00117 TSwizzle<CClassB> iB;
<a name="l00118"></a>00118 TSwizzle<CClassC> iC;
<a name="l00119"></a>00119 CStreamStore& iStore; <span class="comment">// Store to/Restore from this store</span>
<a name="l00120"></a>00120 TStreamId iId; <span class="comment">// Restore from/replace this stream</span>
<a name="l00121"></a>00121 };
<a name="l00122"></a>00122
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <span class="comment">// The file name, extension and path for the file store</span>
<a name="l00125"></a>00125 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFullNameOfFileStore,<span class="stringliteral">"\\epoc32ex\\data\\StoreMapUse.dat"</span>);
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="comment">// Do the example</span>
<a name="l00128"></a>00128 <span class="keyword">static</span> <span class="keywordtype">void</span> doExampleL()
<a name="l00129"></a>00129 {
<a name="l00130"></a>00130 <span class="comment">// make sure directory exists</span>
<a name="l00131"></a>00131 fsSession.MkDirAll(KFullNameOfFileStore);
<a name="l00132"></a>00132 <span class="comment">// Construct a CCompound object and externalize</span>
<a name="l00133"></a>00133 <span class="comment">// it and its components to separate streams.</span>
<a name="l00134"></a>00134 doMakeAndExternalizeL(KFullNameOfFileStore);
<a name="l00135"></a>00135
<a name="l00136"></a>00136 <span class="comment">// Demonstrate deferred loading of component objects</span>
<a name="l00137"></a>00137 doDeferredLoadingL(KFullNameOfFileStore);
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139
<a name="l00140"></a>00140 <span class="keyword">static</span> <span class="keywordtype">void</span> doMakeAndExternalizeL(<span class="keyword">const</span> TDesC& aName)
<a name="l00141"></a>00141 {
<a name="l00142"></a>00142 TParse filestorename;
<a name="l00143"></a>00143 fsSession.Parse(aName,filestorename);
<a name="l00144"></a>00144 <span class="comment">// construct file store object - the file to contain the</span>
<a name="l00145"></a>00145 <span class="comment">// the store replaces any existing file of the same name.</span>
<a name="l00146"></a>00146 CFileStore* store = CPermanentFileStore::ReplaceLC(fsSession,filestorename.FullName(),EFileWrite);
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">// Must say what kind of file store</span>
<a name="l00149"></a>00149 store->SetTypeL(KPermanentFileStoreLayoutUid);
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="comment">// Construct an object of type CCompound ... </span>
<a name="l00152"></a>00152 CCompound* thecompound = CCompound::NewLC(*store);
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="comment">// ... and put some data into it.</span>
<a name="l00155"></a>00155 <span class="comment">// Note that "iA->" achieves the same</span>
<a name="l00156"></a>00156 <span class="comment">// as "iA->AsPtr()->"</span>
<a name="l00157"></a>00157 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassAText,<span class="stringliteral">"CClassA text"</span>);
<a name="l00158"></a>00158 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtClassBText,<span class="stringliteral">"CClassB text"</span>);
<a name="l00159"></a>00159 thecompound->iA.AsPtr()->iBufferA = KTxtClassAText;
<a name="l00160"></a>00160 thecompound->iA.AsPtr()->iXA = -1;
<a name="l00161"></a>00161 thecompound->iA->iYA = 2; <span class="comment">// see note above</span>
<a name="l00162"></a>00162 thecompound->iB.AsPtr()->iBufferB = KTxtClassBText;
<a name="l00163"></a>00163 thecompound->iC.AsPtr()->iZC = 3.456;
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="comment">// Show contents of the CCompound object (and its</span>
<a name="l00166"></a>00166 <span class="comment">// components).</span>
<a name="l00167"></a>00167 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtInitialContent,<span class="stringliteral">"... Initial content of CCompound"</span>);
<a name="l00168"></a>00168 doShowAll(KTxtInitialContent,*thecompound);
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="comment">// stores all components as separate streams and</span>
<a name="l00171"></a>00171 <span class="comment">// then streams the store map</span>
<a name="l00172"></a>00172 TStreamId <span class="keywordtype">id</span> = thecompound->StoreL();
<a name="l00173"></a>00173
<a name="l00174"></a>00174 <span class="comment">// Set the stream id as the root</span>
<a name="l00175"></a>00175 store->SetRootL(<span class="keywordtype">id</span>);
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="comment">// Commit changes to the store</span>
<a name="l00178"></a>00178 store->CommitL();
<a name="l00179"></a>00179
<a name="l00180"></a>00180 <span class="comment">// Destroy:</span>
<a name="l00181"></a>00181 <span class="comment">// 1. the CCompound object</span>
<a name="l00182"></a>00182 <span class="comment">// 2. the store object (this also closes </span>
<a name="l00183"></a>00183 <span class="comment">// the file containing the store)</span>
<a name="l00184"></a>00184 <span class="comment">// Remove both from the cleanup stack</span>
<a name="l00185"></a>00185 CleanupStack::PopAndDestroy(2);
<a name="l00186"></a>00186 }
<a name="l00187"></a>00187
<a name="l00188"></a>00188 <span class="keyword">static</span> <span class="keywordtype">void</span> doDeferredLoadingL(<span class="keyword">const</span> TDesC& aName)
<a name="l00189"></a>00189 {
<a name="l00190"></a>00190 TParse filestorename;
<a name="l00191"></a>00191 fsSession.Parse(aName,filestorename);
<a name="l00192"></a>00192 <span class="comment">// construct file store object - specifying the file</span>
<a name="l00193"></a>00193 <span class="comment">// containing the store.</span>
<a name="l00194"></a>00194 CFileStore* store = CPermanentFileStore::OpenLC(fsSession,filestorename.FullName(),EFileRead);
<a name="l00195"></a>00195
<a name="l00196"></a>00196 <span class="comment">// Construct an object of type CCompound.</span>
<a name="l00197"></a>00197 <span class="comment">// The loading of its components is deferred </span>
<a name="l00198"></a>00198 <span class="comment">// until needed.</span>
<a name="l00199"></a>00199 CCompound* thecompound = CCompound::NewLC(*store,store->Root());
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="comment">// Display component A.</span>
<a name="l00202"></a>00202 <span class="comment">// The component is loaded in from the </span>
<a name="l00203"></a>00203 <span class="comment">// stream if not already loaded.</span>
<a name="l00204"></a>00204 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtFirstDisplay,<span class="stringliteral">" (first display)"</span>);
<a name="l00205"></a>00205 thecompound->DisplayAL(KTxtFirstDisplay);
<a name="l00206"></a>00206
<a name="l00207"></a>00207 <span class="comment">// Re-Display component A</span>
<a name="l00208"></a>00208 <span class="comment">// The component should now be in memory.</span>
<a name="l00209"></a>00209 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtSecondDisplay,<span class="stringliteral">" (second display)"</span>);
<a name="l00210"></a>00210 thecompound->DisplayAL(KTxtSecondDisplay);
<a name="l00211"></a>00211
<a name="l00212"></a>00212 console->Printf(KTxtNewLine);
<a name="l00213"></a>00213
<a name="l00214"></a>00214 <span class="comment">// Destroy:</span>
<a name="l00215"></a>00215 <span class="comment">// 1. the CCompound object</span>
<a name="l00216"></a>00216 <span class="comment">// 2. the store object (this also closes </span>
<a name="l00217"></a>00217 <span class="comment">// the file containing the store)</span>
<a name="l00218"></a>00218 <span class="comment">// Remove both from the cleanup stack</span>
<a name="l00219"></a>00219 CleanupStack::PopAndDestroy(2);
<a name="l00220"></a>00220 }
<a name="l00221"></a>00221
<a name="l00222"></a>00222 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtComponentA,<span class="stringliteral">"... Component A"</span>);
<a name="l00223"></a>00223 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtComponentB,<span class="stringliteral">"... Component B"</span>);
<a name="l00224"></a>00224 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtComponentC,<span class="stringliteral">"... Component C"</span>);
<a name="l00225"></a>00225 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtPressKey,<span class="stringliteral">"\n (press any key to continue)"</span>);
<a name="l00226"></a>00226
<a name="l00227"></a>00227 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowAll(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> CCompound& aCompound)
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 console->Printf(KTxtNewLine);
<a name="l00230"></a>00230 console->Printf(aHeading);
<a name="l00231"></a>00231 <span class="keywordflow">if</span> (aCompound.iA.IsPtr())
<a name="l00232"></a>00232 doShowComponent(KTxtComponentA,*aCompound.iA.AsPtr());
<a name="l00233"></a>00233 <span class="keywordflow">if</span> (aCompound.iB.IsPtr())
<a name="l00234"></a>00234 doShowComponent(KTxtComponentB,*aCompound.iB.AsPtr());
<a name="l00235"></a>00235 <span class="keywordflow">if</span> (aCompound.iB.IsPtr())
<a name="l00236"></a>00236 doShowComponent(KTxtComponentC,*aCompound.iC.AsPtr());
<a name="l00237"></a>00237 console->Printf(KTxtPressKey);
<a name="l00238"></a>00238 console->Getch();
<a name="l00239"></a>00239 }
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowComponent(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> <a class="code" href="class_c_class_a.html">CClassA</a>& aComponent)
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243 console->Printf(KTxtNewLine);
<a name="l00244"></a>00244 console->Printf(aHeading);
<a name="l00245"></a>00245 console->Printf(KFormatType2,&aComponent.iBufferA);
<a name="l00246"></a>00246 console->Printf(KFormatType1,aComponent.iXA);
<a name="l00247"></a>00247 console->Printf(KFormatType3,aComponent.iYA);
<a name="l00248"></a>00248 }
<a name="l00249"></a>00249
<a name="l00250"></a>00250 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowComponent(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> CClassB& aComponent)
<a name="l00251"></a>00251 {
<a name="l00252"></a>00252 console->Printf(KTxtNewLine);
<a name="l00253"></a>00253 console->Printf(aHeading);
<a name="l00254"></a>00254 console->Printf(KFormatType2,&aComponent.iBufferB);
<a name="l00255"></a>00255 }
<a name="l00256"></a>00256
<a name="l00257"></a>00257 <span class="keyword">static</span> <span class="keywordtype">void</span> doShowComponent(<span class="keyword">const</span> TDesC& aHeading,<span class="keyword">const</span> CClassC& aComponent)
<a name="l00258"></a>00258 {
<a name="l00259"></a>00259 console->Printf(KTxtNewLine);
<a name="l00260"></a>00260 console->Printf(aHeading);
<a name="l00261"></a>00261 console->Printf(KFormatType4,aComponent.iZC);
<a name="l00262"></a>00262 }
<a name="l00263"></a>00263
<a name="l00264"></a>00264 <span class="comment">//***************************************************************</span>
<a name="l00265"></a>00265 <span class="comment">//***************************************************************</span>
<a name="l00266"></a>00266 CCompound::CCompound(CStreamStore& aStore)
<a name="l00267"></a>00267 : iStore(aStore)
<a name="l00268"></a>00268 {}
<a name="l00269"></a>00269
<a name="l00270"></a>00270 CCompound::CCompound(CStreamStore& aStore,TStreamId anId)
<a name="l00271"></a>00271 : iStore(aStore), iId(anId)
<a name="l00272"></a>00272 {}
<a name="l00273"></a>00273
<a name="l00274"></a>00274
<a name="l00275"></a>00275 <span class="comment">// Construct a plain CCompound object and</span>
<a name="l00276"></a>00276 <span class="comment">// place on the cleanup stack.</span>
<a name="l00277"></a>00277 CCompound* CCompound::NewLC(CStreamStore& aStore)
<a name="l00278"></a>00278 {
<a name="l00279"></a>00279 CCompound* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CCompound(aStore);
<a name="l00280"></a>00280 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00281"></a>00281 <span class="keyword">self</span>->ConstructL();
<a name="l00282"></a>00282 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00283"></a>00283 }
<a name="l00284"></a>00284
<a name="l00285"></a>00285
<a name="l00286"></a>00286 <span class="comment">// Construct a CCompound object. The</span>
<a name="l00287"></a>00287 <span class="comment">// components are restored when needed; however</span>
<a name="l00288"></a>00288 <span class="comment">// the streamids of the component streams</span>
<a name="l00289"></a>00289 <span class="comment">// ARE restored.</span>
<a name="l00290"></a>00290 CCompound* CCompound::NewLC(CStreamStore& aStore,TStreamId anId)
<a name="l00291"></a>00291 {
<a name="l00292"></a>00292 CCompound* <span class="keyword">self</span>=<span class="keyword">new</span> (ELeave) CCompound(aStore,anId);
<a name="l00293"></a>00293 CleanupStack::PushL(<span class="keyword">self</span>);
<a name="l00294"></a>00294 <span class="keyword">self</span>->RestoreL();
<a name="l00295"></a>00295 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00296"></a>00296 }
<a name="l00297"></a>00297
<a name="l00298"></a>00298 <span class="comment">// Complete the construction of the </span>
<a name="l00299"></a>00299 <span class="comment">// plain CCompound object. Makes implicit </span>
<a name="l00300"></a>00300 <span class="comment">// use of TSwizzle operators.</span>
<a name="l00301"></a>00301 <span class="keywordtype">void</span> CCompound::ConstructL()
<a name="l00302"></a>00302 {
<a name="l00303"></a>00303 iA = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_class_a.html">CClassA</a>;
<a name="l00304"></a>00304 iB = <span class="keyword">new</span> (ELeave) CClassB;
<a name="l00305"></a>00305 iC = <span class="keyword">new</span> (ELeave) CClassC;
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307
<a name="l00308"></a>00308 <span class="comment">// The CCompound destructor. Destroy the swizzled</span>
<a name="l00309"></a>00309 <span class="comment">// contained objects only if they are in memory</span>
<a name="l00310"></a>00310 CCompound::~CCompound()
<a name="l00311"></a>00311 {
<a name="l00312"></a>00312 <span class="keywordflow">if</span> (iA.IsPtr())
<a name="l00313"></a>00313 <span class="keyword">delete</span> iA.AsPtr();
<a name="l00314"></a>00314 <span class="keywordflow">if</span> (iB.IsPtr())
<a name="l00315"></a>00315 <span class="keyword">delete</span> iB.AsPtr();
<a name="l00316"></a>00316 <span class="keywordflow">if</span> (iC.IsPtr())
<a name="l00317"></a>00317 <span class="keyword">delete</span> iC.AsPtr();
<a name="l00318"></a>00318 }
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="keywordtype">void</span> CCompound::RestoreL()
<a name="l00321"></a>00321 {
<a name="l00322"></a>00322 RStoreReadStream stream;
<a name="l00323"></a>00323 stream.OpenLC(iStore,iId);
<a name="l00324"></a>00324 InternalizeL(stream);
<a name="l00325"></a>00325 CleanupStack::PopAndDestroy();
<a name="l00326"></a>00326 }
<a name="l00327"></a>00327
<a name="l00328"></a>00328 <span class="keywordtype">void</span> CCompound::InternalizeL(RReadStream& aStream)
<a name="l00329"></a>00329 {
<a name="l00330"></a>00330 aStream >> iA;
<a name="l00331"></a>00331 aStream >> iB;
<a name="l00332"></a>00332 aStream >> iC;
<a name="l00333"></a>00333 }
<a name="l00334"></a>00334 <span class="comment">// Display the content of the "A" component</span>
<a name="l00335"></a>00335 <span class="comment">// object. The component is fully restored </span>
<a name="l00336"></a>00336 <span class="comment">// from the appropriate stream, if it has not</span>
<a name="l00337"></a>00337 <span class="comment">// already been restored. </span>
<a name="l00338"></a>00338 <span class="keywordtype">void</span> CCompound::DisplayAL(<span class="keyword">const</span> TDesC& aCommentary)
<a name="l00339"></a>00339 {
<a name="l00340"></a>00340 <span class="keywordflow">if</span> (iA.IsId())
<a name="l00341"></a>00341 {
<a name="l00342"></a>00342 <a class="code" href="class_c_class_a.html">CClassA</a>* ptrA = <span class="keyword">new</span> (ELeave) <a class="code" href="class_c_class_a.html">CClassA</a>;
<a name="l00343"></a>00343 CleanupStack::PushL(ptrA);
<a name="l00344"></a>00344 ptrA->RestoreL(iStore,iA.AsId());
<a name="l00345"></a>00345 iA = ptrA;
<a name="l00346"></a>00346 CleanupStack::Pop();
<a name="l00347"></a>00347 }
<a name="l00348"></a>00348 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KTxtRestoredComponent,<span class="stringliteral">"... Displaying restored component A"</span>);
<a name="l00349"></a>00349 TBuf<96> heading(KTxtRestoredComponent);
<a name="l00350"></a>00350 heading.Append(aCommentary);
<a name="l00351"></a>00351 doShowComponent(heading,*iA.AsPtr());
<a name="l00352"></a>00352 }
<a name="l00353"></a>00353
<a name="l00354"></a>00354
<a name="l00355"></a>00355
<a name="l00356"></a>00356 <span class="keywordtype">void</span> CCompound::ExternalizeL(RWriteStream& aStream)<span class="keyword"> const</span>
<a name="l00357"></a>00357 <span class="keyword"> </span>{
<a name="l00358"></a>00358 aStream << iA; <span class="comment">// these are swizzles</span>
<a name="l00359"></a>00359 aStream << iB;
<a name="l00360"></a>00360 aStream << iC;
<a name="l00361"></a>00361 }
<a name="l00362"></a>00362
<a name="l00363"></a>00363 TStreamId CCompound::StoreL()<span class="keyword"> const</span>
<a name="l00364"></a>00364 <span class="keyword"> </span>{
<a name="l00365"></a>00365 CStoreMap* map=<a class="code" href="class_c_sql_example.html#a8b115210a3fbfa19de5c7f6a0abf3e43">CStoreMap::NewLC</a>(iStore);
<a name="l00366"></a>00366 StoreComponentsL(*map);
<a name="l00367"></a>00367 <span class="comment">//</span>
<a name="l00368"></a>00368 RStoreWriteStream stream(*map);
<a name="l00369"></a>00369 TStreamId <span class="keywordtype">id</span>=stream.CreateLC(iStore);
<a name="l00370"></a>00370 ExternalizeL(stream);
<a name="l00371"></a>00371 stream.CommitL();
<a name="l00372"></a>00372 <span class="comment">//</span>
<a name="l00373"></a>00373 map->Reset();
<a name="l00374"></a>00374 CleanupStack::PopAndDestroy(2);
<a name="l00375"></a>00375 <span class="keywordflow">return</span> id;
<a name="l00376"></a>00376 }
<a name="l00377"></a>00377
<a name="l00378"></a>00378 <span class="keywordtype">void</span> CCompound::StoreComponentsL(CStoreMap& aMap)<span class="keyword"> const</span>
<a name="l00379"></a>00379 <span class="keyword"> </span>{
<a name="l00380"></a>00380 TStreamId id;
<a name="l00381"></a>00381
<a name="l00382"></a>00382 <span class="keywordflow">if</span> (iA)
<a name="l00383"></a>00383 {
<a name="l00384"></a>00384 <span class="keywordtype">id</span> = iA->StoreL(iStore);
<a name="l00385"></a>00385 aMap.BindL(iA,<span class="keywordtype">id</span>);
<a name="l00386"></a>00386 }
<a name="l00387"></a>00387
<a name="l00388"></a>00388 <span class="keywordflow">if</span> (iB)
<a name="l00389"></a>00389 {
<a name="l00390"></a>00390 <span class="keywordtype">id</span> = iB->StoreL(iStore);
<a name="l00391"></a>00391 aMap.BindL(iB,<span class="keywordtype">id</span>);
<a name="l00392"></a>00392 }
<a name="l00393"></a>00393
<a name="l00394"></a>00394 <span class="keywordflow">if</span> (iC)
<a name="l00395"></a>00395 {
<a name="l00396"></a>00396 <span class="keywordtype">id</span> = iC->StoreL(iStore);
<a name="l00397"></a>00397 aMap.BindL(iC,<span class="keywordtype">id</span>);
<a name="l00398"></a>00398 }
<a name="l00399"></a>00399 }
<a name="l00400"></a>00400
<a name="l00401"></a>00401 <span class="comment">//***************************************************************</span>
<a name="l00402"></a>00402 <span class="comment">//***************************************************************</span>
<a name="l00403"></a>00403
<a name="l00404"></a>00404 <span class="comment">// Read the data members of the CClassA </span>
<a name="l00405"></a>00405 <span class="comment">// object from the stream.</span>
<a name="l00406"></a>00406 <span class="keywordtype">void</span> CClassA::InternalizeL(RReadStream& aStream)
<a name="l00407"></a>00407 {
<a name="l00408"></a>00408 aStream >> iBufferA;
<a name="l00409"></a>00409 iXA = aStream.ReadInt32L();
<a name="l00410"></a>00410 iYA = aStream.ReadUint32L();
<a name="l00411"></a>00411 }
<a name="l00412"></a>00412 <span class="comment">// Write the data members of the CClassA </span>
<a name="l00413"></a>00413 <span class="comment">// object to the stream.</span>
<a name="l00414"></a>00414 <span class="keywordtype">void</span> CClassA::ExternalizeL(RWriteStream& aStream)<span class="keyword"> const</span>
<a name="l00415"></a>00415 <span class="keyword"> </span>{
<a name="l00416"></a>00416 aStream << iBufferA;
<a name="l00417"></a>00417 aStream.WriteInt32L(iXA);
<a name="l00418"></a>00418 aStream.WriteUint32L(iYA);
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420
<a name="l00421"></a>00421 TStreamId CClassA::StoreL(CStreamStore& aStore)<span class="keyword"> const</span>
<a name="l00422"></a>00422 <span class="keyword"> </span>{
<a name="l00423"></a>00423 RStoreWriteStream stream;
<a name="l00424"></a>00424 TStreamId <span class="keywordtype">id</span>=stream.CreateLC(aStore);
<a name="l00425"></a>00425 ExternalizeL(stream);
<a name="l00426"></a>00426 stream.CommitL();
<a name="l00427"></a>00427 CleanupStack::PopAndDestroy();
<a name="l00428"></a>00428 <span class="keywordflow">return</span> id;
<a name="l00429"></a>00429 }
<a name="l00430"></a>00430
<a name="l00431"></a>00431 <span class="keywordtype">void</span> CClassA::RestoreL(CStreamStore& aStore, TStreamId anId)
<a name="l00432"></a>00432 {
<a name="l00433"></a>00433 RStoreReadStream stream;
<a name="l00434"></a>00434 stream.OpenLC(aStore,anId);
<a name="l00435"></a>00435 InternalizeL(stream);
<a name="l00436"></a>00436 CleanupStack::PopAndDestroy();
<a name="l00437"></a>00437 }
<a name="l00438"></a>00438
<a name="l00439"></a>00439 <span class="comment">//***************************************************************</span>
<a name="l00440"></a>00440 <span class="comment">//***************************************************************</span>
<a name="l00441"></a>00441
<a name="l00442"></a>00442 <span class="comment">// Read the data member(s) of the CClassB </span>
<a name="l00443"></a>00443 <span class="comment">// object from the stream.</span>
<a name="l00444"></a>00444 <span class="keywordtype">void</span> CClassB::InternalizeL(RReadStream& aStream)
<a name="l00445"></a>00445 {
<a name="l00446"></a>00446 aStream >> iBufferB;
<a name="l00447"></a>00447 }
<a name="l00448"></a>00448 <span class="comment">// Write the data member(s) of the CClassB </span>
<a name="l00449"></a>00449 <span class="comment">// object to the stream.</span>
<a name="l00450"></a>00450 <span class="keywordtype">void</span> CClassB::ExternalizeL(RWriteStream& aStream)<span class="keyword"> const</span>
<a name="l00451"></a>00451 <span class="keyword"> </span>{
<a name="l00452"></a>00452 aStream << iBufferB;
<a name="l00453"></a>00453 }
<a name="l00454"></a>00454
<a name="l00455"></a>00455 TStreamId CClassB::StoreL(CStreamStore& aStore)<span class="keyword"> const</span>
<a name="l00456"></a>00456 <span class="keyword"> </span>{
<a name="l00457"></a>00457 RStoreWriteStream stream;
<a name="l00458"></a>00458 TStreamId <span class="keywordtype">id</span>=stream.CreateLC(aStore);
<a name="l00459"></a>00459 ExternalizeL(stream);
<a name="l00460"></a>00460 stream.CommitL();
<a name="l00461"></a>00461 CleanupStack::PopAndDestroy();
<a name="l00462"></a>00462 <span class="keywordflow">return</span> id;
<a name="l00463"></a>00463 }
<a name="l00464"></a>00464
<a name="l00465"></a>00465 <span class="keywordtype">void</span> CClassB::RestoreL(CStreamStore& aStore, TStreamId anId)
<a name="l00466"></a>00466 {
<a name="l00467"></a>00467 RStoreReadStream stream;
<a name="l00468"></a>00468 stream.OpenLC(aStore,anId);
<a name="l00469"></a>00469 InternalizeL(stream);
<a name="l00470"></a>00470 CleanupStack::PopAndDestroy();
<a name="l00471"></a>00471 }
<a name="l00472"></a>00472
<a name="l00473"></a>00473
<a name="l00474"></a>00474 <span class="comment">//***************************************************************</span>
<a name="l00475"></a>00475 <span class="comment">//***************************************************************</span>
<a name="l00476"></a>00476
<a name="l00477"></a>00477 <span class="comment">// Write the data member(s) of the CClassC </span>
<a name="l00478"></a>00478 <span class="comment">// ob ject to the stream.</span>
<a name="l00479"></a>00479 <span class="keywordtype">void</span> CClassC::ExternalizeL(RWriteStream& aStream)<span class="keyword"> const</span>
<a name="l00480"></a>00480 <span class="keyword"> </span>{
<a name="l00481"></a>00481 aStream.WriteReal64L(iZC);
<a name="l00482"></a>00482 }
<a name="l00483"></a>00483 <span class="comment">// Read the data member(s) of the CClassC </span>
<a name="l00484"></a>00484 <span class="comment">// object from the stream.</span>
<a name="l00485"></a>00485 <span class="keywordtype">void</span> CClassC::InternalizeL(RReadStream& aStream)
<a name="l00486"></a>00486 {
<a name="l00487"></a>00487 iZC = aStream.ReadReal64L();
<a name="l00488"></a>00488 }
<a name="l00489"></a>00489
<a name="l00490"></a>00490 TStreamId CClassC::StoreL(CStreamStore& aStore)<span class="keyword"> const</span>
<a name="l00491"></a>00491 <span class="keyword"> </span>{
<a name="l00492"></a>00492 RStoreWriteStream stream;
<a name="l00493"></a>00493 TStreamId <span class="keywordtype">id</span>=stream.CreateLC(aStore);
<a name="l00494"></a>00494 ExternalizeL(stream);
<a name="l00495"></a>00495 stream.CommitL();
<a name="l00496"></a>00496 CleanupStack::PopAndDestroy();
<a name="l00497"></a>00497 <span class="keywordflow">return</span> id;
<a name="l00498"></a>00498 }
<a name="l00499"></a>00499
<a name="l00500"></a>00500
<a name="l00501"></a>00501 <span class="keywordtype">void</span> CClassC::RestoreL(CStreamStore& aStore, TStreamId anId)
<a name="l00502"></a>00502 {
<a name="l00503"></a>00503 RStoreReadStream stream;
<a name="l00504"></a>00504 stream.OpenLC(aStore,anId);
<a name="l00505"></a>00505 InternalizeL(stream);
<a name="l00506"></a>00506 CleanupStack::PopAndDestroy();
<a name="l00507"></a>00507 }
<a name="l00508"></a>00508
<a name="l00509"></a>00509
<a name="l00510"></a>00510
<a name="l00511"></a>00511
<a name="l00512"></a>00512
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