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annotate OrthancStone/Sources/Messages/ICallable.h @ 1598:8563ea5d8ae4

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relicensing some files, cf. osimis bm26 and chu agreement on 2020-05-20
author Sebastien Jodogne <s.jodogne@gmail.com>
date Mon, 26 Oct 2020 20:49:28 +0100
parents 244ad1e4e76a
children 9ac2a65d4172
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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) 2017-2020 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 Lesser 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 * Lesser 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 Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #pragma once
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24
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25 #include "IMessage.h"
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26 #include "IObserver.h"
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27
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28 #include <Logging.h>
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29
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30 #include <boost/noncopyable.hpp>
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31 #include <boost/weak_ptr.hpp>
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32
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33 #include <string>
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34 #include <stdint.h>
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35
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36 namespace OrthancStone
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37 {
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38 // This is referencing an object and member function that can be notified
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39 // by an IObservable. The object must derive from IO
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40 // The member functions must be of type "void Method(const IMessage& message)" or reference a derived class of IMessage
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41 class ICallable : public boost::noncopyable
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42 {
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43 public:
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44 virtual ~ICallable()
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45 {
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46 }
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47
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48 virtual void Apply(const IMessage& message) = 0;
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49
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50 virtual const MessageIdentifier& GetMessageIdentifier() = 0;
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51
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52 // TODO - Is this needed?
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53 virtual boost::weak_ptr<IObserver> GetObserver() const = 0;
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54 };
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56
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57 template <typename TObserver,
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58 typename TMessage>
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59 class Callable : public ICallable
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60 {
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61 private:
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62 typedef void (TObserver::* MemberMethod) (const TMessage&);
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63
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64 boost::weak_ptr<IObserver> observer_;
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65 MemberMethod function_;
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66
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67 public:
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68 Callable(boost::shared_ptr<TObserver> observer,
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69 MemberMethod function) :
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70 observer_(observer),
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71 function_(function)
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72 {
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73 }
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75 virtual void Apply(const IMessage& message)
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76 {
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77 boost::shared_ptr<IObserver> lock(observer_);
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78 if (lock)
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79 {
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80 TObserver& observer = dynamic_cast<TObserver&>(*lock);
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81 const TMessage& typedMessage = dynamic_cast<const TMessage&>(message);
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82 (observer.*function_) (typedMessage);
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83 }
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84 }
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85
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86 virtual const MessageIdentifier& GetMessageIdentifier()
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87 {
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88 return TMessage::GetStaticIdentifier();
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89 }
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90
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91 virtual boost::weak_ptr<IObserver> GetObserver() const
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92 {
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93 return observer_;
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94 }
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95 };
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96 }