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| 1 | +// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen |
| 2 | +// SPDX-License-Identifier: BSD-3-Clause |
| 3 | +#include "vtkInvoker.h" |
| 4 | +#include "vtkLogger.h" |
| 5 | +#include "vtkObjectFactory.h" |
| 6 | + |
| 7 | +#include "vtksys/SystemTools.hxx" |
| 8 | + |
| 9 | +// clang-format off |
| 10 | +#include "vtk_nlohmannjson.h" // for json |
| 11 | +#include VTK_NLOHMANN_JSON(json.hpp) // for json |
| 12 | +// clang-format on |
| 13 | + |
| 14 | +#include <unordered_map> |
| 15 | + |
| 16 | +VTK_ABI_NAMESPACE_BEGIN |
| 17 | + |
| 18 | +class vtkInvoker::vtkInternals |
| 19 | +{ |
| 20 | +public: |
| 21 | + std::unordered_map<std::size_t, vtkInvoker::HandlerType> Handlers; |
| 22 | +}; |
| 23 | + |
| 24 | +//------------------------------------------------------------------------------ |
| 25 | +vtkStandardNewMacro(vtkInvoker); |
| 26 | + |
| 27 | +//------------------------------------------------------------------------------ |
| 28 | +vtkInvoker::vtkInvoker() |
| 29 | + : Internals(new vtkInternals()) |
| 30 | +{ |
| 31 | +} |
| 32 | + |
| 33 | +//------------------------------------------------------------------------------ |
| 34 | +vtkInvoker::~vtkInvoker() = default; |
| 35 | + |
| 36 | +//------------------------------------------------------------------------------ |
| 37 | +void vtkInvoker::PrintSelf(ostream& os, vtkIndent indent) |
| 38 | +{ |
| 39 | + this->Superclass::PrintSelf(os, indent); |
| 40 | + const auto& internals = (*this->Internals); |
| 41 | + os << "No. of handlers: " << internals.Handlers.size() << '\n'; |
| 42 | + for (const auto& item : internals.Handlers) |
| 43 | + { |
| 44 | + os << item.first << ": function pointer (" << item.second.target_type().name() << ")\n"; |
| 45 | + } |
| 46 | +} |
| 47 | + |
| 48 | +//------------------------------------------------------------------------------ |
| 49 | +nlohmann::json vtkInvoker::Invoke( |
| 50 | + const vtkTypeUInt32& identifier, const std::string& methodName, const nlohmann::json& args) |
| 51 | +{ |
| 52 | + if (auto objectBase = this->Context->GetObjectAtId(identifier)) |
| 53 | + { |
| 54 | + auto* objectPtr = objectBase.GetPointer(); |
| 55 | + const auto& typeId = typeid(*objectPtr); |
| 56 | + if (const auto& f = this->GetHandler(typeId)) |
| 57 | + { |
| 58 | + vtkVLog(this->GetInvokerLogVerbosity(), << "Invoke method=\'" << methodName.c_str() |
| 59 | + << "\', args=\'" << args.dump().c_str() << "\'"); |
| 60 | + return f(this, objectPtr, methodName.c_str(), args); |
| 61 | + } |
| 62 | + else |
| 63 | + { |
| 64 | + vtkErrorMacro( |
| 65 | + << "Cannot invoke method on object with type " |
| 66 | + "{ .name=" |
| 67 | + << typeId.name() << " .hashCode=" << typeId.hash_code() |
| 68 | + << " }" |
| 69 | + " because a handler was not found. Check stack trace to see how we got here."); |
| 70 | + } |
| 71 | + } |
| 72 | + else |
| 73 | + { |
| 74 | + vtkWarningMacro(<< "Cannot invoke method \'" << methodName.c_str() |
| 75 | + << "\' on an object (id=" << identifier << ") that does not exist"); |
| 76 | + } |
| 77 | + return { { "success", false } }; |
| 78 | +} |
| 79 | + |
| 80 | +//------------------------------------------------------------------------------ |
| 81 | +void vtkInvoker::RegisterHandler(const std::type_info& type, HandlerType invoker) |
| 82 | +{ |
| 83 | + auto& internals = (*this->Internals); |
| 84 | + vtkVLog(this->GetInvokerLogVerbosity(), |
| 85 | + << "Register invoker at { .name=" << type.name() << " .hashCode=" << type.hash_code() << " }"); |
| 86 | + internals.Handlers[type.hash_code()] = invoker; |
| 87 | +} |
| 88 | + |
| 89 | +//------------------------------------------------------------------------------ |
| 90 | +vtkInvoker::HandlerType vtkInvoker::GetHandler(const std::type_info& type) const |
| 91 | +{ |
| 92 | + const auto& internals = (*this->Internals); |
| 93 | + auto iter = internals.Handlers.find(type.hash_code()); |
| 94 | + if (iter != internals.Handlers.end()) |
| 95 | + { |
| 96 | + return iter->second; |
| 97 | + } |
| 98 | + return nullptr; |
| 99 | +} |
| 100 | + |
| 101 | +//------------------------------------------------------------------------------ |
| 102 | +bool vtkInvoker::UnRegisterHandler(const std::type_info& type) |
| 103 | +{ |
| 104 | + return this->Internals->Handlers.erase(type.hash_code()) != 0; |
| 105 | +} |
| 106 | + |
| 107 | +//------------------------------------------------------------------------------ |
| 108 | +void vtkInvoker::SetInvokerLogVerbosity(vtkLogger::Verbosity verbosity) |
| 109 | +{ |
| 110 | + this->InvokerLogVerbosity = verbosity; |
| 111 | +} |
| 112 | + |
| 113 | +//------------------------------------------------------------------------------ |
| 114 | +vtkLogger::Verbosity vtkInvoker::GetInvokerLogVerbosity() |
| 115 | +{ |
| 116 | + // initialize the log verbosity if it is invalid. |
| 117 | + if (this->InvokerLogVerbosity == vtkLogger::VERBOSITY_INVALID) |
| 118 | + { |
| 119 | + this->InvokerLogVerbosity = vtkLogger::VERBOSITY_TRACE; |
| 120 | + // Find an environment variable that specifies logger verbosity |
| 121 | + const char* verbosityKey = "VTK_INVOKER_LOG_VERBOSITY"; |
| 122 | + if (vtksys::SystemTools::HasEnv(verbosityKey)) |
| 123 | + { |
| 124 | + const char* verbosityCStr = vtksys::SystemTools::GetEnv(verbosityKey); |
| 125 | + const auto verbosity = vtkLogger::ConvertToVerbosity(verbosityCStr); |
| 126 | + if (verbosity > vtkLogger::VERBOSITY_INVALID) |
| 127 | + { |
| 128 | + this->InvokerLogVerbosity = verbosity; |
| 129 | + } |
| 130 | + } |
| 131 | + } |
| 132 | + return this->InvokerLogVerbosity; |
| 133 | +} |
| 134 | +VTK_ABI_NAMESPACE_END |
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