annotate OrthancStone/Sources/Loaders/BasicFetchingStrategy.h @ 1628:555870323ebc

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Sat, 07 Nov 2020 00:08:45 +0100
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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 "IFetchingItemsSorter.h"
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26 #include "IFetchingStrategy.h"
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27
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28 #include <Compatibility.h>
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29
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30 #include <memory>
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31
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32 namespace OrthancStone
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33 {
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34 class BasicFetchingStrategy : public IFetchingStrategy
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35 {
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36 private:
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37 class ContentItem
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38 {
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39 private:
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40 unsigned int item_;
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41 unsigned int quality_;
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42
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43 public:
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44 ContentItem(unsigned int item,
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45 unsigned int quality) :
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46 item_(item),
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47 quality_(quality)
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48 {
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49 }
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50
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51 unsigned int GetItem() const
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52 {
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53 return item_;
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54 }
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56 unsigned int GetQuality() const
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57 {
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58 return quality_;
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59 }
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60 };
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61
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62 std::unique_ptr<IFetchingItemsSorter> sorter_;
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63 std::vector<unsigned int> nextQuality_;
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64 unsigned int maxQuality_;
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65 std::vector<ContentItem> content_;
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66 size_t position_;
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67 unsigned int blockSize_;
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68
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69 void Schedule(unsigned int item,
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70 unsigned int quality);
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71
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72 public:
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73 BasicFetchingStrategy(IFetchingItemsSorter* sorter, // Takes ownership
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74 unsigned int maxQuality);
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75
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76 virtual unsigned int GetItemsCount() const ORTHANC_OVERRIDE
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77 {
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78 return sorter_->GetItemsCount();
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79 }
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80
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81 virtual unsigned int GetMaxQuality() const ORTHANC_OVERRIDE
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82 {
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83 return maxQuality_;
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84 }
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85
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86 // WARNING - This parameters is only considered during the next
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87 // call to SetCurrent().
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88 void SetBlockSize(unsigned int size);
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89
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90 virtual bool GetNext(unsigned int& item,
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91 unsigned int& quality) ORTHANC_OVERRIDE;
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92
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93 virtual void SetCurrent(unsigned int item) ORTHANC_OVERRIDE;
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94
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95 virtual void RecycleFurthest(unsigned int& item) ORTHANC_OVERRIDE;
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96 };
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97 }