Matthew Barth | efe0158 | 2019-09-09 15:22:37 -0500 | [diff] [blame] | 1 | #pragma once |
| 2 | |
| 3 | #include "data_types.hpp" |
| 4 | |
| 5 | #include <algorithm> |
| 6 | #include <functional> |
| 7 | |
| 8 | namespace phosphor |
| 9 | { |
| 10 | namespace dbus |
| 11 | { |
| 12 | namespace monitoring |
| 13 | { |
| 14 | |
| 15 | /** @class Filters |
| 16 | * @brief Filter interface |
| 17 | * |
| 18 | * Filters of any type can be applied to property value changes. |
| 19 | */ |
| 20 | class Filters |
| 21 | { |
| 22 | public: |
| 23 | Filters() = default; |
| 24 | Filters(const Filters&) = delete; |
| 25 | Filters(Filters&&) = default; |
| 26 | Filters& operator=(const Filters&) = delete; |
| 27 | Filters& operator=(Filters&&) = default; |
| 28 | virtual ~Filters() = default; |
| 29 | |
| 30 | /** @brief Apply filter operations to a property value. */ |
| 31 | virtual bool operator()(const any_ns::any& value) = 0; |
| 32 | }; |
| 33 | |
| 34 | /** @class OperandFilters |
| 35 | * @brief Filter property values utilzing operand based functions. |
| 36 | * |
| 37 | * When configured, an operand filter is applied to a property value each |
| 38 | * time it changes to determine if that property value should be filtered |
| 39 | * from being stored or used within a given callback function. |
| 40 | */ |
| 41 | template <typename T> |
| 42 | class OperandFilters : public Filters |
| 43 | { |
| 44 | public: |
| 45 | OperandFilters() = delete; |
| 46 | OperandFilters(const OperandFilters&) = delete; |
| 47 | OperandFilters(OperandFilters&&) = default; |
| 48 | OperandFilters& operator=(const OperandFilters&) = delete; |
| 49 | OperandFilters& operator=(OperandFilters&&) = default; |
| 50 | virtual ~OperandFilters() = default; |
| 51 | explicit OperandFilters(const std::vector<std::function<bool(T)>>& _ops) : |
| 52 | Filters(), ops(std::move(_ops)) |
| 53 | { |
| 54 | } |
| 55 | |
| 56 | bool operator()(const any_ns::any& value) override |
| 57 | { |
| 58 | for (const auto& filterOps : ops) |
| 59 | { |
| 60 | try |
| 61 | { |
| 62 | // Apply filter operand to property value |
| 63 | if (!filterOps(any_ns::any_cast<T>(value))) |
| 64 | { |
| 65 | // Property value should be filtered |
| 66 | return true; |
| 67 | } |
| 68 | } |
| 69 | catch (const any_ns::bad_any_cast& bac) |
| 70 | { |
| 71 | // Unable to cast property value to filter value type |
| 72 | // to check filter, continue to next filter op |
| 73 | continue; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | // Property value should not be filtered |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | private: |
| 82 | /** @brief List of operand based filter functions. */ |
| 83 | const std::vector<std::function<bool(T)>> ops; |
| 84 | }; |
| 85 | |
| 86 | } // namespace monitoring |
| 87 | } // namespace dbus |
| 88 | } // namespace phosphor |