1 /* |
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2 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Definition of CGlxtnVolumeDatabase |
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15 * |
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16 */ |
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17 |
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18 |
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19 |
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20 /** |
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21 * @internal reviewed 30/07/2007 by Simon Brooks |
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22 */ |
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23 |
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24 #ifndef GLXTNVOLUMEDATABASE_H |
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25 #define GLXTNVOLUMEDATABASE_H |
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26 |
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27 #include <e32base.h> |
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28 #include <d32dbms.h> // For RDbStoreDatabase |
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29 #include <f32file.h> // For TDriveName |
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30 |
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31 #include <glxmediaid.h> |
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32 #include "glxtnstd.h" // For TGlxImageDataFormat |
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33 #include "mglxtnvolumedatabaseobserver.h" // For TGlxtnThumbnailId |
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34 |
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35 class CFileStore; |
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36 class CGlxtnFileInfo; |
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37 class MGlxtnVolumeDatabaseObserver; |
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38 |
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39 /** |
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40 * CGlxtnVolumeDatabase implements the database for a single volume. |
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41 * |
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42 * @author Dan Rhodes |
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43 * @ingroup glx_thumbnail_creator |
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44 */ |
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45 NONSHARABLE_CLASS(CGlxtnVolumeDatabase) : public CActive |
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46 { |
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47 public: |
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48 /** |
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49 * Static constructor. |
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50 * @param aObserver Observer of database operations. |
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51 * @param aFs File server handle. |
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52 * @param aPath Full path to the database file to use. |
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53 */ |
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54 static CGlxtnVolumeDatabase* NewLC(MGlxtnVolumeDatabaseObserver& aObserver, |
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55 RFs& aFs, |
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56 const TDesC& aPath); |
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57 |
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58 /** |
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59 * Destructor |
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60 */ |
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61 ~CGlxtnVolumeDatabase(); |
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62 |
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63 /** |
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64 * Get the drive this database is stored on |
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65 */ |
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66 const TDesC& Drive() const; |
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67 |
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68 /** |
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69 * Look up thumbnail ID from Ids table |
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70 * @param aMediaId Media item ID. |
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71 */ |
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72 void GetThumbnailIdL( const TGlxMediaId& aMediaId ); |
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73 /** |
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74 * Look up thumbnail ID from Items table. If not found, add new record. |
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75 * @param aInfo File info for media item. |
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76 */ |
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77 void GetThumbnailIdL(const CGlxtnFileInfo* aInfo); |
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78 /** |
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79 * Add record to Ids table |
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80 * @param aMediaId Media item ID. |
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81 * @param aThumbId Thumbnail ID. |
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82 */ |
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83 void StoreThumbnailIdL( const TGlxMediaId& aMediaId, |
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84 const TGlxtnThumbnailId& aThumbId ); |
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85 /** |
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86 * Look up thumbnail from Thumbnails table |
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87 * @param aThumbId Thumbnail ID. |
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88 * @param aSize Thumbnail size. |
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89 */ |
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90 void GetThumbnailL( const TGlxtnThumbnailId& aThumbId, const TSize& aSize ); |
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91 /** |
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92 * Check if a particular thumbnail is in Thumbnails table |
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93 * @param aThumbId Thumbnail ID. |
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94 * @param aSize Thumbnail size. |
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95 */ |
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96 void CheckAvailableL( const TGlxtnThumbnailId& aThumbId, const TSize& aSize ); |
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97 /** |
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98 * Add record to Thumbnails table |
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99 * @param aThumbId Thumbnail ID. |
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100 * @param aSize Thumbnail size. |
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101 * @param aFormat Thumbnail data format. |
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102 * @param aData Thumbnail binary data. |
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103 */ |
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104 void StoreThumbnailL( const TGlxtnThumbnailId& aThumbId, const TSize& aSize, |
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105 TGlxImageDataFormat aFormat, const TDesC8& aData ); |
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106 |
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107 /** |
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108 * Delete a record from the Ids table |
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109 * @param aMediaId MediaId of record to delete. |
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110 */ |
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111 void DeleteIdL( const TGlxMediaId& aMediaId ); |
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112 |
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113 /** |
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114 * Delete a record from the Thumbnails table |
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115 * @param aThumbId ThumbId of records to delete. |
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116 */ |
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117 void DeleteThumbnailsL( const TGlxtnThumbnailId& aThumbId ); |
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118 |
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119 /** |
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120 * Delete a record from the Items table |
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121 * @param aThumbId ThumbId of record to delete. |
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122 */ |
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123 void DeleteItemL( const TGlxtnThumbnailId& aThumbId ); |
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124 |
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125 /** |
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126 * Cleanup Database (remove entries that do not have corresponding file) |
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127 */ |
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128 void CleanupDatabaseL(); |
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129 |
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130 protected: // From CActive |
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131 void DoCancel(); |
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132 void RunL(); |
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133 TInt RunError(TInt aError); |
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134 |
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135 private: |
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136 /** |
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137 * Default constructor. |
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138 * @param aObserver Observer of database operations. |
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139 * @param aFs File server handle. |
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140 */ |
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141 CGlxtnVolumeDatabase(MGlxtnVolumeDatabaseObserver& aObserver, RFs& aFs); |
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142 /** |
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143 * 2nd phase constructor. |
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144 * @param aPath Full path to the database file to use. |
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145 */ |
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146 void ConstructL(const TDesC& aPath); |
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147 |
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148 /** |
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149 * Open an existing database. |
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150 * @param aFs File server handle. |
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151 * @param aPath Full path to the database file to use. |
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152 */ |
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153 void OpenDbL(RFs& aFs, const TDesC& aFilename); |
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154 |
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155 /** |
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156 * Create a new database. |
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157 * @param aFs File server handle. |
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158 * @param aPath Full path to the database file to use. |
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159 */ |
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160 void CreateDbL(RFs& aFs, const TDesC& aFilename); |
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161 |
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162 /** |
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163 * Add record to Items table |
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164 * @return Thumbnail ID of new record. |
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165 */ |
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166 TGlxtnThumbnailId DoAddItemL(); |
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167 |
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168 /** |
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169 * Evaluate a view based on a SQL query. |
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170 * @param aQuery The SQL select statement. |
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171 */ |
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172 void EvaluateQueryL( const TDbQuery &aQuery ); |
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173 |
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174 /** |
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175 * Execute a SQL data update statement. |
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176 * @param aSql The SQL statement. |
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177 */ |
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178 void UpdateDataL( const TDesC& aSql ); |
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179 |
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180 /** |
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181 * Test and cleanup a row in Items table |
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182 */ |
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183 void CleanupRowL(); |
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184 |
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185 /** |
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186 * Modify SQL string to handle quotes correctly |
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187 * @param aText String to be modified |
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188 * @return New HBufC containing modified string |
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189 */ |
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190 HBufC* QuoteSqlStringLC(const TDesC& aText); |
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191 |
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192 private: |
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193 enum TDatabaseState |
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194 { |
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195 EStateIdle, |
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196 EStateGettingIdFromMediaId, |
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197 EStateGettingIdFromFilename, |
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198 EStateGettingThumbnail, |
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199 EStateDeletingId, |
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200 EStateDeletingThumbnails, |
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201 EStateDeletingItem, |
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202 EStateCheckingAvailability, |
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203 EStateCleaning, |
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204 EStateCleaningDeletingThumbnails |
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205 }; |
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206 |
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207 /** Observer of this database */ |
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208 MGlxtnVolumeDatabaseObserver& iObserver; |
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209 /** File server session */ |
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210 RFs& iFs; |
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211 /** Drive name of the volume */ |
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212 TDriveName iDrive; |
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213 /** Handle to the database */ |
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214 RDbStoreDatabase iDatabase; |
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215 /** Store used by the database */ |
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216 CFileStore* iStore; |
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217 /** ID for next stored thumbnail */ |
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218 TUint iNextThumbId; |
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219 /** File info for media item current query relates to (not owned) */ |
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220 const CGlxtnFileInfo* iInfo; |
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221 /** Current state */ |
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222 TDatabaseState iState; |
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223 /** View used for current query */ |
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224 RDbView iView; |
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225 /** Updater to update a table */ |
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226 RDbUpdate iDbUpdater; |
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227 /** Table used for query/deletion of rows in table */ |
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228 RDbTable iTable; |
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229 }; |
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230 |
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231 #endif // GLXTNVOLUMEDATABASE_H |
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