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annotate OrthancStone/Sources/Messages/ICallable.h @ 1871:7053b8a0aaec

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:18:48 +0100
parents 3889ae96d2e9
children 07964689cb0b
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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) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #pragma once
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25
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26 #include "IMessage.h"
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27 #include "IObserver.h"
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28
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29 #include <Logging.h>
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30
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31 #include <boost/noncopyable.hpp>
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32 #include <boost/weak_ptr.hpp>
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33
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34 #include <string>
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35 #include <stdint.h>
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36
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37 namespace OrthancStone
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38 {
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39 // This is referencing an object and member function that can be notified
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40 // by an IObservable. The object must derive from IO
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41 // The member functions must be of type "void Method(const IMessage& message)" or reference a derived class of IMessage
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42 class ICallable : public boost::noncopyable
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43 {
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44 public:
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45 virtual ~ICallable()
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46 {
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47 }
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48
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49 virtual void Apply(const IMessage& message) = 0;
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50
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51 virtual const MessageIdentifier& GetMessageIdentifier() = 0;
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52
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53 // TODO - Is this needed?
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54 virtual boost::weak_ptr<IObserver> GetObserver() const = 0;
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55 };
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57
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58 template <typename TObserver,
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59 typename TMessage>
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60 class Callable : public ICallable
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61 {
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62 private:
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63 typedef void (TObserver::* MemberMethod) (const TMessage&);
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64
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65 boost::weak_ptr<IObserver> observer_;
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66 MemberMethod function_;
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68 public:
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69 Callable(boost::shared_ptr<TObserver> observer,
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70 MemberMethod function) :
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71 observer_(observer),
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72 function_(function)
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73 {
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74 }
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75
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76 virtual void Apply(const IMessage& message)
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77 {
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78 boost::shared_ptr<IObserver> lock(observer_);
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79 if (lock)
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80 {
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81 TObserver& observer = dynamic_cast<TObserver&>(*lock);
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82 const TMessage& typedMessage = dynamic_cast<const TMessage&>(message);
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83 (observer.*function_) (typedMessage);
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84 }
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85 }
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86
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87 virtual const MessageIdentifier& GetMessageIdentifier()
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88 {
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89 return TMessage::GetStaticIdentifier();
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90 }
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91
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92 virtual boost::weak_ptr<IObserver> GetObserver() const
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93 {
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94 return observer_;
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95 }
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96 };
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97 }