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1 // Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // ss_rmetaextensioncontainer.cpp |
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15 // |
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16 |
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17 |
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18 #include "ss_rmetaextensioncontainer.h" |
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19 #include "ss_cmetaextensioncontainer.h" |
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20 |
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21 using namespace ESock; |
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22 |
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23 _LIT(KMecPanic, "mecpanic"); |
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24 |
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25 void PanicMec(TMecPanic aCode) |
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26 { |
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27 User::Panic(KMecPanic, aCode); |
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28 } |
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29 |
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30 // =========================================================== |
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31 // RMetaExtensionContainerC |
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32 // =========================================================== |
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33 |
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34 EXPORT_C RMetaExtensionContainerC::RMetaExtensionContainerC() |
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35 : iContainerImpl(NULL) |
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36 { |
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37 } |
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38 |
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39 EXPORT_C RMetaExtensionContainerC::~RMetaExtensionContainerC() |
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40 { |
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41 } |
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42 |
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43 EXPORT_C void RMetaExtensionContainerC::Open() |
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44 { |
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45 __ASSERT_ALWAYS(iContainerImpl, PanicMec(ENoImplementation)); |
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46 iContainerImpl->Open(); |
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47 } |
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48 |
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49 EXPORT_C void RMetaExtensionContainerC::Open(const RMetaExtensionContainerC& aSource) |
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50 { |
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51 __ASSERT_ALWAYS(&aSource != this, PanicMec(EInvalidSelfReference)); |
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52 __ASSERT_ALWAYS(aSource.Container(), PanicMec(ENoImplementation)); |
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53 __ASSERT_ALWAYS(!iContainerImpl, PanicMec(EAlreadyOpen)); |
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54 |
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55 aSource.Container()->Open(); |
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56 iContainerImpl = aSource.Container(); |
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57 } |
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58 |
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59 EXPORT_C void RMetaExtensionContainerC::Close() |
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60 { |
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61 if (iContainerImpl) |
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62 { |
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63 iContainerImpl->Close(); |
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64 iContainerImpl = NULL; |
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65 } |
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66 } |
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67 |
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68 EXPORT_C const Meta::SMetaData* RMetaExtensionContainerC::FindExtension(const Meta::STypeId& aTypeId) const |
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69 { |
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70 __ASSERT_ALWAYS(iContainerImpl, PanicMec(ENoImplementation)); |
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71 return iContainerImpl->FindExtension(aTypeId); |
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72 } |
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73 |
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74 |
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75 EXPORT_C const Meta::SMetaData& RMetaExtensionContainerC::FindExtensionL(const Meta::STypeId& aTypeId) const |
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76 { |
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77 __ASSERT_ALWAYS(iContainerImpl, PanicMec(ENoImplementation)); |
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78 return iContainerImpl->FindExtensionL(aTypeId); |
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79 } |
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80 |
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81 |
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82 // =========================================================== |
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83 // RMetaExtensionContainer |
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84 // =========================================================== |
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85 |
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86 EXPORT_C RMetaExtensionContainer::RMetaExtensionContainer() |
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87 : iIsLazyCreationDone(EFalse), iIsOpen(EFalse), iCurrentExtensionContainer(NULL) |
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88 { |
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89 } |
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90 |
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91 |
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92 EXPORT_C void RMetaExtensionContainer::Open() |
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93 { |
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94 __ASSERT_ALWAYS(!iIsOpen, PanicMec(EAlreadyOpen)); |
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95 |
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96 // Using lazy creation of the implementation so that Open() is infallible |
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97 // This boolean ensures that Open() is still called before use of the container |
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98 iIsOpen = ETrue; |
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99 } |
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100 |
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101 |
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102 EXPORT_C void RMetaExtensionContainer::Open(const RMetaExtensionContainerC& aBaseContainer) |
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103 { |
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104 __ASSERT_ALWAYS(!iIsOpen, PanicMec(EAlreadyOpen)); |
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105 RMetaExtensionContainerC::Open(aBaseContainer); |
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106 iIsOpen = ETrue; |
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107 } |
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108 |
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109 |
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110 EXPORT_C void RMetaExtensionContainer::Close() |
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111 { |
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112 if (iIsOpen) |
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113 { |
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114 if (AppendableExtensionContainer()) |
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115 { |
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116 AppendableExtensionContainer()->Compact(); |
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117 } |
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118 iIsOpen = EFalse; |
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119 } |
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120 |
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121 RMetaExtensionContainerC::Close(); |
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122 } |
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123 |
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124 |
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125 void RMetaExtensionContainer::CreateExtensionContainerL() |
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126 { |
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127 // Don't call it unless it should be created |
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128 __ASSERT_DEBUG(!AppendableExtensionContainer(), PanicMec(EIllegalState)); |
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129 |
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130 CMetaExtensionContainerImplBase* pendingBaseContainerImpl = NULL; |
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131 if (!iIsLazyCreationDone) |
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132 { |
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133 // Retrieve the pending base container implementation if there is one |
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134 pendingBaseContainerImpl = Container(); |
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135 } |
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136 |
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137 CMetaExtensionContainer* mecImpl = CMetaExtensionContainer::NewLC(pendingBaseContainerImpl); |
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138 if (!iIsLazyCreationDone) |
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139 { |
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140 // If there is no proper container implementation this normal extension container |
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141 // will become it. |
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142 // Base class takes ownership of the new container implementation reference |
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143 SetContainer(mecImpl); |
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144 |
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145 if (pendingBaseContainerImpl) |
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146 { |
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147 // Remove the holding reference - the new container implementation has its own |
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148 pendingBaseContainerImpl->Close(); |
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149 } |
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150 |
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151 iIsLazyCreationDone = ETrue; |
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152 } |
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153 else |
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154 { |
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155 // There is an existing container implementation. Given the fact that the |
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156 // CreateExtensionContainerL method has been called it must be of the |
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157 // container array type. This will own (the reference on) our new extension |
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158 // container. |
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159 __ASSERT_DEBUG(Container()->Type() == CMetaExtensionContainerImplBase::EMetaExtensionContainerArray, PanicMec(EIllegalState)); |
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160 __ASSERT_DEBUG(!pendingBaseContainerImpl, PanicMec(EIllegalState)); |
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161 User::LeaveIfError(AppendableContainerArray()->AppendContainer(*mecImpl)); |
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162 } |
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163 |
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164 __ASSERT_DEBUG(!iCurrentExtensionContainer, PanicMec(EIllegalState)); |
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165 iCurrentExtensionContainer = mecImpl; |
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166 CleanupStack::Pop(mecImpl); |
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167 } |
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168 |
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169 |
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170 void RMetaExtensionContainer::CreateContainerArrayL() |
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171 { |
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172 ASSERT(!AppendableContainerArray()); // Don't call it unless it should be created |
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173 |
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174 CMetaExtensionContainerImplBase* pendingBaseContainerImpl = NULL; |
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175 if (!iIsLazyCreationDone) |
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176 { |
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177 // Retrieve the pending base container implementation if there is one |
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178 pendingBaseContainerImpl = Container(); |
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179 } |
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180 |
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181 CMetaExtensionContainerArray* mecImpl = CMetaExtensionContainerArray::NewLC(pendingBaseContainerImpl); |
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182 if (!iIsLazyCreationDone) |
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183 { |
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184 // If there is no proper container implementation this container array implementation |
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185 // will become it. |
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186 // Base class takes ownership of the new container implementation reference |
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187 SetContainer(mecImpl); |
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188 |
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189 if (pendingBaseContainerImpl) |
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190 { |
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191 // Remove the holding reference - the new container implementation has its own |
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192 pendingBaseContainerImpl->Close(); |
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193 } |
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194 |
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195 iIsLazyCreationDone = ETrue; |
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196 } |
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197 else |
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198 { |
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199 // There is an existing container implementation. Given the fact that the |
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200 // CreateContainerArrayL method has been called it must be of the |
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201 // normal extension container type. This will be replaced with a container |
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202 // array implementation which will own (the reference on) the existing |
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203 // container. |
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204 __ASSERT_DEBUG(Container()->Type() == CMetaExtensionContainerImplBase::EMetaExtensionContainer, PanicMec(EIllegalState)); |
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205 __ASSERT_DEBUG(!pendingBaseContainerImpl, PanicMec(EIllegalState)); |
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206 __ASSERT_DEBUG(iCurrentExtensionContainer, PanicMec(EIllegalState)); |
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207 User::LeaveIfError(mecImpl->AppendContainer(*iCurrentExtensionContainer)); |
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208 |
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209 // Close our reference on the extension container, the container array will open its own |
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210 iCurrentExtensionContainer->Close(); |
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211 iCurrentExtensionContainer = NULL; |
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212 SetContainer(mecImpl); |
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213 } |
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214 |
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215 CleanupStack::Pop(mecImpl); |
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216 } |
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217 |
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218 |
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219 EXPORT_C const Meta::SMetaData* RMetaExtensionContainer::FindExtension(const Meta::STypeId& aTypeId) const |
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220 { |
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221 __ASSERT_ALWAYS(iIsOpen, PanicMec(ENoImplementation)); |
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222 if (Container()) |
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223 { |
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224 return Container()->FindExtension(aTypeId); |
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225 } |
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226 return NULL; |
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227 } |
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228 |
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229 |
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230 EXPORT_C const Meta::SMetaData& RMetaExtensionContainer::FindExtensionL(const Meta::STypeId& aTypeId) const |
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231 { |
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232 __ASSERT_ALWAYS(iIsOpen, PanicMec(ENoImplementation)); |
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233 if (!Container()) |
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234 { |
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235 User::Leave(KErrNotFound); |
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236 } |
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237 return Container()->FindExtensionL(aTypeId); |
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238 } |
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239 |
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240 |
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241 EXPORT_C TInt RMetaExtensionContainer::AppendExtension(const Meta::SMetaData* aExtension) |
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242 { |
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243 __ASSERT_ALWAYS(iIsOpen, PanicMec(ENoImplementation)); |
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244 |
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245 if (!aExtension) |
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246 { |
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247 return KErrArgument; |
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248 } |
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249 |
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250 CMetaExtensionContainer* mecImpl = AppendableExtensionContainer(); |
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251 if (!mecImpl) |
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252 { |
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253 // Do lazy creation |
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254 TRAPD(err, CreateExtensionContainerL()); |
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255 if (err != KErrNone) |
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256 { |
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257 return err; |
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258 } |
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259 mecImpl = AppendableExtensionContainer(); |
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260 } |
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261 |
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262 return mecImpl->AppendExtension(aExtension); |
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263 } |
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264 |
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265 |
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266 EXPORT_C void RMetaExtensionContainer::AppendExtensionL(const Meta::SMetaData* aExtension) |
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267 { |
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268 __ASSERT_ALWAYS(iIsOpen, PanicMec(ENoImplementation)); |
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269 |
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270 if (!aExtension) |
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271 { |
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272 User::Leave(KErrArgument); |
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273 } |
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274 |
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275 CMetaExtensionContainer* mecImpl = AppendableExtensionContainer(); |
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276 if (!mecImpl) |
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277 { |
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278 // Do lazy creation |
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279 CreateExtensionContainerL(); |
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280 mecImpl = AppendableExtensionContainer(); |
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281 } |
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282 |
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283 mecImpl->AppendExtensionL(aExtension); |
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284 } |
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285 |
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286 |
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287 EXPORT_C void RMetaExtensionContainer::AppendContainerL(const RMetaExtensionContainerC& aContainer) |
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288 { |
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289 __ASSERT_ALWAYS(&aContainer != this, PanicMec(EInvalidSelfReference)); |
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290 __ASSERT_ALWAYS(iIsOpen, PanicMec(ENoImplementation)); |
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291 |
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292 CMetaExtensionContainerImplBase* containerImpl = static_cast<const RMetaExtensionContainer&>(aContainer).Container(); |
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293 __ASSERT_ALWAYS(containerImpl, PanicMec(ENoImplementation)); |
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294 __ASSERT_ALWAYS(containerImpl != Container(), PanicMec(EInvalidSelfReference)); |
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295 |
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296 CMetaExtensionContainerArray* mecImpl = AppendableContainerArray(); |
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297 if (!mecImpl) |
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298 { |
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299 // Do lazy creation |
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300 CreateContainerArrayL(); |
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301 mecImpl = AppendableContainerArray(); |
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302 } |
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303 |
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304 const RMetaExtensionContainer& containerIfc = static_cast<const RMetaExtensionContainer&>(aContainer); |
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305 User::LeaveIfError(mecImpl->AppendContainer(*containerIfc.Container())); |
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306 |
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307 // Null the current extension container pointer forcing a new extension container to be |
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308 // created and appended to the array after the one that has been added |
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309 iCurrentExtensionContainer = NULL; |
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310 } |
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311 |
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312 |
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313 CMetaExtensionContainer* RMetaExtensionContainer::AppendableExtensionContainer() const |
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314 { |
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315 return iIsLazyCreationDone ? iCurrentExtensionContainer : NULL; |
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316 } |
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317 |
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318 |
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319 CMetaExtensionContainerArray* RMetaExtensionContainer::AppendableContainerArray() const |
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320 { |
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321 if (iIsLazyCreationDone) |
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322 { |
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323 const CMetaExtensionContainerImplBase* mecImpl = Container(); |
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324 if (mecImpl && mecImpl->Type() == CMetaExtensionContainerImplBase::EMetaExtensionContainerArray) |
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325 { |
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326 return const_cast<CMetaExtensionContainerArray*>(static_cast<const CMetaExtensionContainerArray*>(mecImpl)); |
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327 } |
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328 } |
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329 return NULL; |
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330 } |
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331 |
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332 |