JSONPropertyReader.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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/* JSONPropertyReader.h                                        (C) 2000-2026 */
/*                                                                           */
/* Reading properties in JSON format.                                        */
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#ifndef ARCANE_UTILS_INTERNAL_JSONPROPERTYREADER_H
#define ARCANE_UTILS_INTERNAL_JSONPROPERTYREADER_H
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/*
 * NOTE: The classes in this file are under development.
 * NOTE: The API may change at any time. Do not use outside of Arcane.
 */
 
#include "arccore/common/JSONReader.h"
#include "arccore/common/internal/Property.h"
 
#include <iostream>
 
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namespace Arcane::properties
{
 
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template <typename T>
class JSONPropertyReader
: public PropertyVisitor<T>
{
 public:
 
  JSONPropertyReader(JSONValue jv, T& instance)
  : m_jv(jv)
  , m_instance(instance)
  {}
 
 private:
 
  JSONValue m_jv;
  T& m_instance;
 
 public:
 
  void visit(const PropertySettingBase<T>& s) override
  {
    JSONValue child_value = m_jv.child(s.setting()->name());
    if (child_value.null())
      return;
    s.setFromJSON(child_value, m_instance);
    s.print(std::cout, m_instance);
  }
};
 
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template <typename T, typename PropertyType = T> inline void
readFromJSON(JSONValue jv, T& instance)
{
  const char* instance_property_name = PropertyType ::propertyClassName();
  JSONValue child_value = jv.child(instance_property_name);
  if (child_value.null())
    return;
  JSONPropertyReader reader(child_value, instance);
  PropertyType ::applyPropertyVisitor(reader);
}
 
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} // End namespace Arcane::properties
 
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#endif