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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtDBus module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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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 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #ifndef QDBUSPENDINGREPLY_H |
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43 #define QDBUSPENDINGREPLY_H |
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44 |
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45 #include <QtCore/qglobal.h> |
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46 #include <QtDBus/qdbusmacros.h> |
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47 #include <QtDBus/qdbusargument.h> |
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48 #include <QtDBus/qdbuspendingcall.h> |
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49 |
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50 QT_BEGIN_HEADER |
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51 |
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52 QT_BEGIN_NAMESPACE |
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53 |
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54 QT_MODULE(DBus) |
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55 |
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56 class QDBUS_EXPORT QDBusPendingReplyData: public QDBusPendingCall |
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57 { |
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58 protected: |
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59 QDBusPendingReplyData(); |
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60 ~QDBusPendingReplyData(); |
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61 void assign(const QDBusPendingCall &call); |
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62 void assign(const QDBusMessage &message); |
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63 |
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64 QVariant argumentAt(int index) const; |
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65 void setMetaTypes(int count, const int *metaTypes); |
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66 }; |
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67 |
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68 namespace QDBusPendingReplyTypes { |
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69 template<int Index, |
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70 typename T1, typename T2, typename T3, typename T4, |
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71 typename T5, typename T6, typename T7, typename T8> |
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72 struct Select |
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73 { |
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74 typedef Select<Index - 1, T2, T3, T4, T5, T6, T7, T8, void> Next; |
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75 typedef typename Next::Type Type; |
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76 }; |
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77 template<typename T1, typename T2, typename T3, typename T4, |
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78 typename T5, typename T6, typename T7, typename T8> |
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79 struct Select<0, T1, T2, T3, T4, T5, T6, T7, T8> |
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80 { |
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81 typedef T1 Type; |
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82 }; |
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83 |
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84 template<typename T1> inline int metaTypeFor(T1 * = 0) |
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85 { return qMetaTypeId<T1>(); } |
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86 // specialise for QVariant, allowing it to be used in place of QDBusVariant |
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87 template<> inline int metaTypeFor<QVariant>(QVariant *) |
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88 { return qMetaTypeId<QDBusVariant>(); } |
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89 |
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90 template<typename T1, typename T2, typename T3, typename T4, |
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91 typename T5, typename T6, typename T7, typename T8> |
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92 struct ForEach |
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93 { |
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94 typedef ForEach<T2, T3, T4, T5, T6, T7, T8, void> Next; |
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95 enum { Total = Next::Total + 1 }; |
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96 static inline void fillMetaTypes(int *p) |
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97 { |
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98 *p = metaTypeFor<T1>(0); |
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99 Next::fillMetaTypes(++p); |
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100 } |
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101 }; |
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102 template<> |
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103 struct ForEach<void, void, void, void, void, void, void, void> |
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104 { |
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105 enum { Total = 0 }; |
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106 static inline void fillMetaTypes(int *) |
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107 { } |
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108 }; |
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109 } // namespace QDBusPendingReplyTypes |
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110 |
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111 template<typename T1 = void, typename T2 = void, typename T3 = void, typename T4 = void, |
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112 typename T5 = void, typename T6 = void, typename T7 = void, typename T8 = void> |
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113 class QDBusPendingReply: |
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114 #ifdef Q_QDOC |
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115 public QDBusPendingCall |
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116 #else |
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117 public QDBusPendingReplyData |
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118 #endif |
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119 { |
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120 typedef QDBusPendingReplyTypes::ForEach<T1, T2, T3, T4, T5, T6, T7, T8> ForEach; |
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121 template<int Index> struct Select : |
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122 QDBusPendingReplyTypes::Select<Index, T1, T2, T3, T4, T5, T6, T7, T8> |
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123 { |
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124 }; |
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125 |
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126 public: |
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127 enum { Count = ForEach::Total }; |
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128 |
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129 inline QDBusPendingReply() |
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130 { } |
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131 inline QDBusPendingReply(const QDBusPendingReply &other) |
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132 : QDBusPendingReplyData(other) |
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133 { } |
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134 inline QDBusPendingReply(const QDBusPendingCall &call) |
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135 { *this = call; } |
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136 inline QDBusPendingReply(const QDBusMessage &message) |
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137 { *this = message; } |
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138 inline QDBusPendingReply &operator=(const QDBusPendingReply &other) |
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139 { assign(other); return *this; } |
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140 inline QDBusPendingReply &operator=(const QDBusPendingCall &call) |
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141 { assign(call); return *this; } |
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142 inline QDBusPendingReply &operator=(const QDBusMessage &message) |
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143 { assign(message); return *this; } |
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144 |
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145 inline int count() const { return Count; } |
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146 |
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147 #if defined(Q_QDOC) || defined(Q_NO_USING_KEYWORD) |
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148 inline QVariant argumentAt(int index) const |
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149 { return QDBusPendingReplyData::argumentAt(index); } |
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150 #else |
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151 using QDBusPendingReplyData::argumentAt; |
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152 #endif |
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153 |
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154 #if defined(Q_QDOC) |
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155 bool isFinished() const; |
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156 void waitForFinished(); |
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157 |
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158 bool isValid() const; |
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159 bool isError() const; |
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160 QDBusError error() const; |
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161 QDBusMessage reply() const; |
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162 |
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163 template<int Index> inline Type argumentAt() const; |
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164 inline T1 value() const; |
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165 inline operator T1() const; |
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166 #else |
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167 template<int Index> inline |
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168 const typename Select<Index>::Type argumentAt() const |
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169 { |
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170 // static assert? |
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171 Q_ASSERT_X(Index < count() && Index >= 0, "QDBusPendingReply::argumentAt", |
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172 "Index out of bounds"); |
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173 typedef typename Select<Index>::Type ResultType; |
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174 return qdbus_cast<ResultType>(argumentAt(Index), 0); |
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175 } |
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176 |
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177 inline typename Select<0>::Type value() const |
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178 { |
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179 return argumentAt<0>(); |
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180 } |
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181 |
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182 inline operator typename Select<0>::Type() const |
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183 { |
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184 return argumentAt<0>(); |
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185 } |
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186 #endif |
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187 |
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188 private: |
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189 inline void calculateMetaTypes() |
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190 { |
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191 int typeIds[Count > 0 ? Count : 1]; // use at least one since zero-sized arrays aren't valid |
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192 ForEach::fillMetaTypes(typeIds); |
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193 setMetaTypes(Count, typeIds); |
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194 } |
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195 |
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196 inline void assign(const QDBusPendingCall &call) |
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197 { |
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198 QDBusPendingReplyData::assign(call); |
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199 calculateMetaTypes(); |
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200 } |
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201 |
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202 inline void assign(const QDBusMessage &message) |
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203 { |
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204 QDBusPendingReplyData::assign(message); |
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205 calculateMetaTypes(); |
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206 } |
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207 }; |
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208 |
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209 QT_END_NAMESPACE |
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210 |
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211 QT_END_HEADER |
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212 |
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213 #endif |