author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 25 Aug 2010 15:52:14 +0300 | |
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/* |
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* Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* @file |
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* This contains CDataDictionary |
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* |
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*/ |
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/** |
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@prototype |
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@test |
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*/ |
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#include <e32std.h> |
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#include "datadictionary.h" |
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#include "datawrapper.h" |
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TUint32 CDataDictionary::Hash(const TDataDictionaryName& aName) |
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{ |
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return DefaultHash::Des16(aName); |
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} |
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|
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TBool CDataDictionary::Identity(const TDataDictionaryName& aName1, const TDataDictionaryName& aName2) |
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{ |
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return aName1.Compare(aName2)==0; |
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} |
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|
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CDataDictionary::CDataDictionary() |
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/** |
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* Constructor |
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*/ |
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: iStore(Hash, Identity) |
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, iCurrentObject(NULL) |
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{ |
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} |
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|
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CDataDictionary::~CDataDictionary() |
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/** |
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* Destructor |
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*/ |
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{ |
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Empty(); |
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} |
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void CDataDictionary::AddDataL(const TDataDictionaryName& aName, CDataWrapper* aData) |
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/** |
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* Add a data entry to the dictionary |
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* |
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* @param aName - name of the dictionary entry |
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* @param aData - the data to add. The dictionary becomes owner of the object |
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* and is responsble for it's deletion |
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* |
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* @see TDataDictionaryName |
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* @see CDataWrapper |
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* |
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* @leave KErrAlreadyExists if the dictionary entry aName, or aData already exists. |
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* @leave KErrNoMemory if memory could not be allocated to store the copies of aName and aData. |
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* @leave system wide errors |
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*/ |
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{ |
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// Ensure name does not already exist |
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if ( iStore.Find(aName) != NULL ) |
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{ |
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User::Leave(KErrAlreadyExists); |
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} |
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// Ensure data does not already exist |
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TDataIter iter(iStore); |
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iter.Reset(); |
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for ( CDataWrapper*const * data=iter.NextValue(); data!=NULL; data=iter.NextValue() ) |
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{ |
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if ( aData == *data ) |
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{ |
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User::Leave(KErrAlreadyExists); |
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} |
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} |
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iStore.InsertL(aName, aData); |
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if ( iCurrentObject == NULL ) |
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{ |
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iCurrentObject=aData; |
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} |
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} |
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void CDataDictionary::DeleteDataL(const TDataDictionaryName& aName) |
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/** |
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* Delete a data entry from the dictionary |
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* |
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* @param aName - name of the dictionary entry |
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* |
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* @see TDataDictionaryName |
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* |
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* @leave KErrNotFound if the dictionary entry aName is not found |
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*/ |
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110 |
{ |
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// Ensure name already exist |
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CDataWrapper** wrapper=iStore.Find(aName); |
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113 |
|
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if ( wrapper != NULL ) |
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115 |
{ |
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delete* wrapper; |
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iStore.Remove(aName); |
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} |
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119 |
else |
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120 |
{ |
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User::Leave(KErrNotFound); |
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122 |
} |
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123 |
} |
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124 |
|
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void CDataDictionary::SetCurrentDataL(const TDataDictionaryName& aName) |
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/** |
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* Set the current active dictionary entry |
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* |
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* @param aName - name of the dictionary entry |
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130 |
* |
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* @see TDataDictionaryName |
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132 |
* |
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* @leave KErrNotFound if the dictionary entry aName is not found |
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134 |
*/ |
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135 |
{ |
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// Ensure name already exist |
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CDataWrapper** wrapper=iStore.Find(aName); |
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138 |
|
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if ( wrapper != NULL ) |
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140 |
{ |
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iCurrentObject=*wrapper; |
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142 |
} |
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143 |
else |
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144 |
{ |
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User::Leave(KErrNotFound); |
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146 |
} |
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147 |
} |
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148 |
|
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149 |
CDataWrapper* CDataDictionary::GetDataL(const TDataDictionaryName& aName) |
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150 |
/** |
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151 |
* Get an object in the dictionary |
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152 |
* |
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153 |
* @param aName - name of the dictionary entry |
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154 |
* |
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155 |
* @see TDataDictionaryName |
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156 |
* |
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157 |
* @leave KErrNotFound if the dictionary entry aName is not found |
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158 |
* |
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159 |
* @return The data object found |
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160 |
*/ |
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161 |
{ |
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162 |
// Ensure name already exist |
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163 |
CDataWrapper** ret=iStore.Find(aName); |
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164 |
|
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165 |
if ( ret == NULL ) |
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166 |
{ |
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167 |
User::Leave(KErrNotFound); |
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168 |
} |
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169 |
|
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170 |
return *ret; |
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171 |
} |
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172 |
|
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TAny* CDataDictionary::GetObjectL(const TDesC& aName) |
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174 |
/** |
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175 |
* Get an object in the dictionary |
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176 |
* |
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177 |
* @param aName - name of the dictionary entry |
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178 |
* |
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179 |
* @return The object found |
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180 |
* |
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181 |
* @leave KErrNotFound if the dictionary entry aName is not found |
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182 |
*/ |
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183 |
{ |
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184 |
// Ensure name already exist |
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185 |
CDataWrapper** wrapper=iStore.Find(aName); |
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186 |
TAny* ret=NULL; |
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187 |
|
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188 |
if ( wrapper != NULL ) |
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189 |
{ |
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190 |
ret=(*wrapper)->GetObject(); |
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191 |
} |
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192 |
else |
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193 |
{ |
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194 |
User::Leave(KErrNotFound); |
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195 |
} |
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196 |
|
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197 |
return ret; |
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198 |
} |
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199 |
|
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200 |
void CDataDictionary::Empty() |
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201 |
/** |
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202 |
* Empty the object dictionary |
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203 |
*/ |
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204 |
{ |
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205 |
TDataIter iter(iStore); |
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206 |
iter.Reset(); |
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for ( CDataWrapper*const * data=iter.NextValue(); data!=NULL; data=iter.NextValue() ) |
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208 |
{ |
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209 |
delete *data; |
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210 |
} |
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211 |
iStore.Close(); |
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212 |
|
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iCurrentObject=NULL; |
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214 |
} |
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215 |
|
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216 |
TInt CDataDictionary::Outstanding(const TDesC& aName, TBool& aMoreToDo) |
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217 |
/** |
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218 |
* Delegates to a data object to see if |
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219 |
* it has any outstanding requests |
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* |
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* @param aName - Name of the dictionary entry |
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* |
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* @leave KErrNotFound if the dictionary entry aName is not found |
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* |
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* @return ETrue if there are any outstanding requests |
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*/ |
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{ |
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TInt retCode=KErrNone; |
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aMoreToDo=EFalse; |
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if ( aName.Compare(KTEFNull)==0 ) |
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{ |
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TDataIter iter(iStore); |
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iter.Reset(); |
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for ( CDataWrapper*const * data=iter.NextValue(); (data!=NULL) && (!aMoreToDo); data=iter.NextValue() ) |
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{ |
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aMoreToDo = (*data)->Outstanding(); |
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} |
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} |
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else |
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{ |
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// Ensure name already exist |
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CDataWrapper** wrapper=iStore.Find(aName); |
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|
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if ( wrapper != NULL ) |
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{ |
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aMoreToDo = (*wrapper)->Outstanding(); |
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} |
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else |
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{ |
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retCode=KErrNotFound; |
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} |
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} |
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|
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return retCode; |
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} |
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|
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TAny* CDataDictionary::CurrentObject() |
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/** |
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* Get the object of the current active dictionary entry |
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* |
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* @return The object that the current data wraps |
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*/ |
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{ |
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return iCurrentObject ? iCurrentObject->GetObject() : NULL; |
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} |
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/** |
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* Set an object in the dictionary |
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* |
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* @param aName - name of the dictionary entry |
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* @param aObject - object that the wrapper is testing |
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* |
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* @see TDataDictionaryName |
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* |
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* @leave KErrNotFound if the dictionary entry aName is not found |
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* @leave KErrNotSupported if the the function is not supported |
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*/ |
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void CDataDictionary::SetObjectL(const TDataDictionaryName& aName, TAny* aObject) |
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{ |
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GetDataL(aName)->SetObjectL(aObject); |
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} |