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annotate Framework/Messages/IMessage.h @ 643:f0008c55e5f7

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getting rid of MessageType enumeration
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 10 May 2019 17:34:48 +0200
parents 9cd19b28f011
children e713f1a99861 2d8ab34c8c91
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21
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22 #pragma once
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23
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24 #include <boost/noncopyable.hpp>
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25
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26 #include <string.h>
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27
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28 namespace OrthancStone
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29 {
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30 class MessageIdentifier
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31 {
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32 private:
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33 const char* file_;
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34 int line_;
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35
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36 public:
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37 MessageIdentifier(const char* file,
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38 int line) :
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39 file_(file),
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40 line_(line)
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41 {
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42 }
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43
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44 MessageIdentifier() :
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45 file_(NULL),
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46 line_(0)
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47 {
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48 }
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49
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50 bool operator< (const MessageIdentifier& other) const
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51 {
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52 if (file_ == NULL)
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53 {
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54 return false;
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55 }
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56 else if (line_ != other.line_)
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57 {
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58 return line_ < other.line_;
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59 }
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60 else
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61 {
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62 return strcmp(file_, other.file_) < 0;
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63 }
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64 }
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65 };
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68 /**
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69 * Base messages that are exchanged between IObservable and
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70 * IObserver. Messages are distinguished by the "__FILE__" and
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71 * "__LINE__" macro, as in "Orthanc::SQLite::StatementId".
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72 **/
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73 class IMessage : public boost::noncopyable
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74 {
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75 public:
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76 virtual ~IMessage()
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77 {
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78 }
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79
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80 virtual const MessageIdentifier& GetIdentifier() const = 0;
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81 };
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82
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83
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84 /**
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85 * Simple message implementation when no payload is needed but the
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86 * origin is required. Sample usage:
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87 * typedef OriginMessage<OrthancSlicesLoader> SliceGeometryErrorMessage;
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88 **/
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89 template <typename TOrigin>
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90 class OriginMessage : public IMessage
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91 {
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92 private:
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93 const TOrigin& origin_;
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94
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95 public:
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96 OriginMessage(const TOrigin& origin) :
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97 origin_(origin)
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98 {
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99 }
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100
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101 const TOrigin& GetOrigin() const
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102 {
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103 return origin_;
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104 }
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105 };
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106 }
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107
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108
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109 #define ORTHANC_STONE_MESSAGE(FILE, LINE) \
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110 public: \
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111 static const ::OrthancStone::MessageIdentifier& GetStaticIdentifier() \
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112 { \
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113 static const ::OrthancStone::MessageIdentifier id(FILE, LINE); \
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114 return id; \
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115 } \
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116 \
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117 virtual const ::OrthancStone::MessageIdentifier& GetIdentifier() const \
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118 { \
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119 return GetStaticIdentifier(); \
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120 }
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121
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122
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123 #define ORTHANC_STONE_DEFINE_ORIGIN_MESSAGE(FILE, LINE, NAME, ORIGIN) \
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124 class NAME : public ::OrthancStone::OriginMessage<ORIGIN> \
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125 { \
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126 ORTHANC_STONE_MESSAGE(FILE, LINE); \
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127 \
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128 NAME(const ORIGIN& origin) : \
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129 OriginMessage(origin) \
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130 { \
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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 #define ORTHANC_STONE_DEFINE_EMPTY_MESSAGE(FILE, LINE, NAME) \
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136 class NAME : public ::OrthancStone::IMessage \
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137 { \
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138 ORTHANC_STONE_MESSAGE(FILE, LINE); \
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139 };