ConfigurationPropertyReader.h

// -*- tab-width: 2; indent-tabs-mode: nil; coding: utf-8-with-signature -*-
//-----------------------------------------------------------------------------
// Copyright 2000-2026 CEA (www.cea.fr) IFPEN (www.ifpenergiesnouvelles.com)
// See the top-level COPYRIGHT file for details.
// SPDX-License-Identifier: Apache-2.0
//-----------------------------------------------------------------------------
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/* ConfigurationPropertyReader.h                               (C) 2000-2025 */
/*                                                                           */
/* Reading properties from an 'IConfiguration'.                              */
/*---------------------------------------------------------------------------*/
#ifndef ARCANE_CORE_INTERNAL_CONFIGURATIONPROPERTYREADER_H
#define ARCANE_CORE_INTERNAL_CONFIGURATIONPROPERTYREADER_H
/*---------------------------------------------------------------------------*/
/*---------------------------------------------------------------------------*/
 
/*
 * NOTE: The classes in this file are currently under development.
 * NOTE: The API may change at any time. Do not use outside of Arcane.
 */
 
#include "arcane/core/IConfiguration.h"
#include "arccore/common/internal/Property.h"
 
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/*---------------------------------------------------------------------------*/
 
namespace Arcane::properties
{
 
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template <typename T>
class ConfigurationPropertyReader
: public PropertyVisitor<T>
{
 public:
 
  ConfigurationPropertyReader(IConfigurationSection* cs, T& instance)
  : m_configuration_section(cs)
  , m_instance(instance)
  {}
 
 private:
 
  IConfigurationSection* m_configuration_section;
  T& m_instance;
 
 public:
 
  void visit(const PropertySettingBase<T>& s) override
  {
    const String& pname = s.setting()->name();
    String value = m_configuration_section->value(pname, String());
    if (value.null())
      return;
    s.setFromString(value, m_instance);
    s.print(std::cout, m_instance);
  }
};
 
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template <typename T> inline void
readFromConfiguration(IConfiguration* c, T& instance)
{
  if (!c)
    return;
  const char* instance_property_name = T ::propertyClassName();
  ScopedPtrT<IConfigurationSection> cs(c->createSection(instance_property_name));
  ConfigurationPropertyReader reader(cs.get(), instance);
  T ::applyPropertyVisitor(reader);
}
 
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} // End namespace Arcane::properties
 
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#endif