PropertyManagerProperty.cpp

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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidKernel/PropertyManagerProperty.h"
#include "MantidKernel/PropertyManager.h"
#include "MantidKernel/PropertyManagerDataService.h"
#include "MantidKernel/PropertyWithValue.hxx"
#include "MantidKernel/PropertyWithValueJSON.h"
 
#include <json/value.h>
 
#include <sstream>
 
namespace Mantid::Kernel {
 
// -----------------------------------------------------------------------------
// Public Methods
// -----------------------------------------------------------------------------
PropertyManagerProperty::PropertyManagerProperty(const std::string &name, unsigned int direction)
    : PropertyManagerProperty(name, ValueType(), direction) {}
 
PropertyManagerProperty::PropertyManagerProperty(const std::string &name, const ValueType &defaultValue,
                                                 unsigned int direction)
    : BaseClass(name, defaultValue, direction), m_dataServiceKey(), m_defaultAsStr() {
  if (name.empty()) {
    throw std::invalid_argument("PropertyManagerProperty() requires a name");
  }
  if (defaultValue)
    m_defaultAsStr = defaultValue->asString(true);
}
 
std::string PropertyManagerProperty::value() const {
  if (m_dataServiceKey.empty()) {
    auto mgr = (*this)();
    return (mgr ? mgr->asString(true) : "");
  } else
    return m_dataServiceKey;
}
 
Json::Value PropertyManagerProperty::valueAsJson() const { return (*this)()->asJson(true); }
 
std::string PropertyManagerProperty::getDefault() const { return m_defaultAsStr; }
 
std::string PropertyManagerProperty::setValue(const std::string &strValue) {
  auto &globalPropMgrs = PropertyManagerDataService::Instance();
  try {
    (*this) = globalPropMgrs.retrieve(strValue);
    m_dataServiceKey = strValue;
    return "";
  } catch (Exception::NotFoundError &) {
    // try the string as json
  }
 
  auto pmValue = (*this)();
  if (!pmValue) {
    pmValue = std::make_shared<PropertyManager>();
    (*this) = pmValue;
  }
  std::string strValueToSet = strValue.empty() ? "{}" : strValue;
  std::ostringstream msg;
  try {
    const std::unordered_set<std::string> ignored;
    bool createMissing{true};
    pmValue->resetProperties();
    pmValue->setProperties(strValueToSet, ignored, createMissing);
    m_dataServiceKey.clear();
  } catch (std::invalid_argument &exc) {
    msg << "Error setting value from string.\n"
           "String is expected to contain either the name of a global "
           "PropertyManager or a json-formatted object.\n"
           "Parser error: "
        << exc.what();
  } catch (std::exception &exc) {
    msg << "Error setting value from string.\n" << exc.what();
  }
  return msg.str();
}
 
std::string PropertyManagerProperty::setValueFromJson(const Json::Value &value) {
  if (value.type() == Json::objectValue) {
    try {
      *this = createPropertyManager(value);
      return "";
    } catch (std::exception &exc) {
      return std::string("Attempt to set Json value to property failed: ") + exc.what();
    }
  } else {
    return std::string("Attempt to set incorrect Json type to "
                       "PropertyManager. Expected objectValue, found " +
                       std::to_string(value.type()));
  }
}
 
// -----------------------------------------------------------------------------
// IPropertyManager::getValue instantiations
// -----------------------------------------------------------------------------
template <>
MANTID_KERNEL_DLL PropertyManager_sptr IPropertyManager::getValue<PropertyManager_sptr>(const std::string &name) const {
  auto *prop = dynamic_cast<PropertyWithValue<PropertyManager_sptr> *>(getPointerToProperty(name));
  if (prop) {
    return *prop;
  } else {
    throw std::runtime_error(std::string("Attempt to assign property ") + name +
                             " to incorrect type. Expected shared_ptr<PropertyManager>.");
  }
}
 
template <>
MANTID_KERNEL_DLL PropertyManager_const_sptr
IPropertyManager::getValue<PropertyManager_const_sptr>(const std::string &name) const {
  auto const *prop = dynamic_cast<PropertyWithValue<PropertyManager_sptr> *>(getPointerToProperty(name));
  if (prop) {
    return prop->operator()();
  } else {
    std::string message =
        "Attempt to assign property " + name + " to incorrect type. Expected const shared_ptr<PropertyManager>.";
    throw std::runtime_error(message);
  }
}
 
} // namespace Mantid::Kernel