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annotate Framework/Toolbox/ObserversRegistry.h @ 90:64e60018943f wasm

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fix and observer refactoring
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 29 May 2017 11:04:18 +0200
parents c2dc924f1a63
children 81f73efd81a1
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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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7207a407bcd8 shared copyright with osimis
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5 * Copyright (C) 2017 Osimis, 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 "../../Resources/Orthanc/Core/OrthancException.h"
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26 #include <boost/noncopyable.hpp>
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27 #include <set>
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28
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29 namespace OrthancStone
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30 {
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31 template <
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32 typename Source,
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33 typename Observer = typename Source::IChangeObserver
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34 >
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35 class ObserversRegistry : public boost::noncopyable
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36 {
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37 private:
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38 struct ChangeFunctor : public boost::noncopyable
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39 {
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40 void operator() (Observer& observer,
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41 const Source& source)
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42 {
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43 observer.NotifyChange(source);
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44 }
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45 };
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46
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47 typedef std::set<Observer*> Observers;
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49 Observers observers_;
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51 public:
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52 template <typename Functor>
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53 void Notify(const Source* source,
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54 Functor& functor)
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55 {
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56 if (source == NULL)
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57 {
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58 throw Orthanc::OrthancException(Orthanc::ErrorCode_ParameterOutOfRange);
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59 }
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61 for (typename Observers::const_iterator observer = observers_.begin();
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62 observer != observers_.end(); ++observer)
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63 {
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64 functor(**observer, *source);
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65 }
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66 }
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68 template <typename Functor>
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69 void Notify(const Source* source)
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70 {
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71 // Use the default functor
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72 Functor functor;
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73 Notify(source, functor);
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74 }
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75
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76 void NotifyChange(const Source* source)
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77 {
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78 Notify<ChangeFunctor>(source);
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79 }
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81 void Register(Observer& observer)
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82 {
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83 observers_.insert(&observer);
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84 }
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85
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86 void Unregister(Observer& observer)
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87 {
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88 observers_.erase(&observer);
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89 }
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90
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91 bool IsEmpty()
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92 {
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93 return observers_.empty();
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94 }
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95
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96 void Apply(const Source& source,
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97 void (Observer::*method) (const Source&))
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98 {
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99 for (typename Observers::const_iterator it = observers_.begin();
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100 it != observers_.end(); ++it)
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101 {
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102 ((*it)->*method) (source);
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103 }
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104 }
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105
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106 template <typename Argument0>
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107 void Apply(const Source& source,
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108 void (Observer::*method) (const Source&, const Argument0&),
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109 const Argument0& argument0)
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110 {
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111 for (typename Observers::const_iterator it = observers_.begin();
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112 it != observers_.end(); ++it)
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113 {
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114 ((*it)->*method) (source, argument0);
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115 }
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116 }
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117
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118 template <typename Argument0,
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119 typename Argument1>
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120 void Apply(const Source& source,
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121 void (Observer::*method) (const Source&, const Argument0&, const Argument1&),
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122 const Argument0& argument0,
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123 const Argument1& argument1)
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124 {
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125 for (typename Observers::const_iterator it = observers_.begin();
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126 it != observers_.end(); ++it)
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127 {
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128 ((*it)->*method) (source, argument0, argument1);
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129 }
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130 }
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131 };
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132 }