1 /* |
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2 * Copyright (c) 2007-2008 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: |
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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 #include "hnxmlmodelcache.h" |
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20 #include "hnglobals.h" |
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21 |
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22 // --------------------------------------------------------------------------- |
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23 // |
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24 // --------------------------------------------------------------------------- |
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25 // |
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26 TUint32 HBufCHashCache( HBufC* const & aBuf ) |
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27 { |
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28 return DefaultHash::Des16(*aBuf); |
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29 } |
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30 |
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31 // --------------------------------------------------------------------------- |
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32 // |
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33 // --------------------------------------------------------------------------- |
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34 // |
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35 TBool HBufCIdentCache( HBufC* const & aL, HBufC* const & aR ) |
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36 { |
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37 return DefaultIdentity::Des16(*aL, *aR); |
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38 } |
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39 |
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40 |
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41 // --------------------------------------------------------------------------- |
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42 // |
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43 // --------------------------------------------------------------------------- |
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44 // |
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45 CHnXmlModelCache::CHnXmlModelCache() : iDocuments( &HBufCHashCache, |
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46 &HBufCIdentCache ) |
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47 { |
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48 |
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49 } |
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50 |
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51 // --------------------------------------------------------------------------- |
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52 // |
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53 // --------------------------------------------------------------------------- |
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54 // |
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55 void CHnXmlModelCache::ConstructL() |
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56 { |
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57 |
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58 } |
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59 |
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60 // --------------------------------------------------------------------------- |
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61 // |
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62 // --------------------------------------------------------------------------- |
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63 // |
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64 void CHnXmlModelCache::RemoveUnused() |
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65 { |
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66 // remove unnecessary (oldest and unused) xml cached documents |
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67 if(iDocuments.Count() > KXmlModelCacheMaxLength) |
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68 { |
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69 HBufC *suiteToRemove = iOrder[0]; |
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70 RXmlEngDocument* document = iDocuments.Find( suiteToRemove ); |
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71 document->Close(); |
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72 iDocuments.Remove(suiteToRemove); |
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73 iOrder.Remove(0); |
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74 delete suiteToRemove; |
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75 } |
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76 } |
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77 |
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78 // --------------------------------------------------------------------------- |
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79 // |
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80 // --------------------------------------------------------------------------- |
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81 // |
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82 TInt CHnXmlModelCache::AddL( const TDesC& aSuiteName, RXmlEngDocument& aDocument ) |
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83 { |
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84 HBufC* key = aSuiteName.AllocLC(); |
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85 iDocuments.InsertL( key, aDocument ); |
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86 CleanupStack::Pop( key ); |
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87 iOrder.AppendL( key ); |
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88 RemoveUnused(); |
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89 return KErrNone; |
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90 } |
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91 |
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92 // --------------------------------------------------------------------------- |
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93 // |
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94 // --------------------------------------------------------------------------- |
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95 // |
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96 TBool CHnXmlModelCache::IsCachedL( const TDesC& aSuiteName ) |
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97 { |
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98 HBufC* buf = aSuiteName.AllocLC(); |
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99 const RXmlEngDocument* res = iDocuments.Find( buf ); |
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100 CleanupStack::PopAndDestroy( buf ); |
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101 |
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102 if ( res ) |
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103 return ETrue; |
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104 else |
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105 return EFalse; |
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106 } |
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107 |
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108 // --------------------------------------------------------------------------- |
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109 // |
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110 // --------------------------------------------------------------------------- |
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111 // |
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112 void CHnXmlModelCache::MoveToTopL( const TDesC & aSuiteName ) |
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113 { |
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114 TInt pos( KErrNotFound ); |
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115 |
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116 for ( TInt i(0); i < iOrder.Count(); i++ ) |
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117 { |
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118 if ( !iOrder[i]->Compare( aSuiteName ) ) |
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119 { |
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120 pos = i; |
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121 break; |
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122 } |
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123 } |
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124 |
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125 // if document was found and is not the latest in the array |
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126 if ( pos != KErrNotFound && ( pos != iOrder.Count() - 1 ) ) |
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127 { |
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128 HBufC *tmp = iOrder[ pos ]; |
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129 iOrder.Remove( pos ); |
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130 iOrder.AppendL( tmp ); |
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131 } |
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132 } |
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133 |
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134 // --------------------------------------------------------------------------- |
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135 // |
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136 // --------------------------------------------------------------------------- |
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137 // |
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138 void CHnXmlModelCache::GetL( const TDesC& aSuiteName, |
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139 RXmlEngDocument& aDocument ) |
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140 { |
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141 HBufC* buf = aSuiteName.AllocLC(); |
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142 const RXmlEngDocument* res = iDocuments.Find( buf ); |
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143 |
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144 MoveToTopL( aSuiteName ); |
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145 |
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146 if ( res ) |
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147 { |
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148 aDocument = *res; |
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149 } |
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150 |
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151 CleanupStack::PopAndDestroy( buf ); |
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152 } |
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153 |
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154 // --------------------------------------------------------------------------- |
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155 // |
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156 // --------------------------------------------------------------------------- |
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157 // |
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158 CHnXmlModelCache* CHnXmlModelCache::NewLC() |
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159 { |
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160 CHnXmlModelCache* self = new (ELeave) CHnXmlModelCache(); |
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161 CleanupStack::PushL( self ); |
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162 self->ConstructL(); |
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163 return self; |
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164 } |
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165 |
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166 // --------------------------------------------------------------------------- |
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167 // |
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168 // --------------------------------------------------------------------------- |
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169 // |
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170 CHnXmlModelCache* CHnXmlModelCache::NewL() |
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171 { |
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172 CHnXmlModelCache* self = CHnXmlModelCache::NewLC(); |
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173 CleanupStack::Pop( self ); |
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174 return self; |
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175 } |
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176 |
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177 // --------------------------------------------------------------------------- |
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178 // |
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179 // --------------------------------------------------------------------------- |
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180 // |
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181 void CHnXmlModelCache::Reset() |
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182 { |
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183 THashMapIter<HBufC*, RXmlEngDocument> iter( iDocuments ); |
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184 while ( HBufC* const * ptr = iter.NextKey() ) |
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185 { |
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186 RXmlEngDocument* currentDocument = iter.CurrentValue(); |
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187 currentDocument->Close(); |
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188 delete *ptr; |
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189 } |
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190 iDocuments.Close(); |
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191 // Names have already been destroyed when destroying iDocuments so |
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192 // it is not necessay to destroy elements of the iOrder array. |
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193 iOrder.Close(); |
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194 } |
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195 |
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196 |
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197 // --------------------------------------------------------------------------- |
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198 // |
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199 // --------------------------------------------------------------------------- |
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200 // |
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201 CHnXmlModelCache::~CHnXmlModelCache() |
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202 { |
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203 Reset(); |
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204 } |
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